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    Ingestion of rubber tips of artificial turf fields by goldfish

    StatementsWe report our study in accordance with ARRIVE guidelines.Structure of artificial turf of ICUA schematic illustration of a ground plan of the artificial turf sports field of the ICU is shown in Fig. 1. This artificial turf was installed in 2013 by Japanese company B. The field is surrounded by ditches, and there are three drains that connect to sewer pipes. The artificial turf field of TGU was installed in 2011 by Japanese company C.Characterization of rubber tips of artificial turf field of ICU and TGURT were collected from the artificial fields of ICU and TGU. RT for the artificial turf field of ICU were made of residual part of rubber for making tires, window frames and windshields of automobiles. RT of ICU consists of a mixture of EPDM (ethylene-propylene-diene) and SBR (styrene-butadiene rubber) (personal communication from a Japanese company B). The RT of TGU was made of rubber of the residual part of rubber for making tires, window frames, etc. (personal communication from a Japanese company C). Information on raw material of the RT was not manifested.RT collected from the fields (ICU and TGU) was sieved to estimate the particle sizes. The RT of the ICU varied from 0.053 to 3.35 mm, and that of TGU varied from 0.212 to 3.35 mm. The specific gravity of the RT was obtained as follows: A certain amount of RT was weighed and poured into a 10 ml graduated cylinder containing some water. The total volume of the RT was obtained by measuring the rise in the meniscus of the water. The specific gravities of the tested RT were 1.28 (ICU) and 1.28 (TGU). Elemental analyses of RT (ICU and TGU) were conducted using micro-PIXE line analysis47, and calcium, sulfur, zinc, and iron were detected, but lead was under the detection limit from the RT of both ICU and TGU.Sampling of sediments in the ditches of the fieldTo examine the migration of RT from the field to the ditches, approximately 200 g of sediments in the ditches was sampled at four different sites, D1–D4 (Fig. 1), in the ICU. The ditch surrounding the field is made by connecting U-shaped concrete blocks and concrete lids. The inner width, length, and depth of the block are 24, 60, and 24 cm, respectively. The size of the lid is 33 × 60 × 4.5 cm with 1.5 × 9.0 cm snicks at short sides, which make an opening of the ditch of 3.0 × 9.0 cm size between two lids.Each sample was weighed (wet weight) and washed with water using a fine sieve to remove the soil. After the removal of the soil, the sediment was dried, and RT was collected manually. The collected RT was weighed, and the percentages of RT in the sediments were calculated (weight/weight).Goldfish and crucian carpA common variety of goldfish C. auratus of different sizes were obtained from a fish merchant in Saitama Prefecture and from a pet shop in Tokyo and then kept in the ICU. Approximately 200 fish of four different sizes (large, body weight (BW) ~ 100 g; medium, BW, ~ 30 g; small-medium, BW, ~ 15 g; small, BW ~ 4.0 g) were kept in three 800-L stock tanks maintained at 20 °C under a 16-h light/8-h dark (16 L/8 D) photoperiod (lights on at 06:00). Small body size fish were kept in a floating cage in one of the stock tanks. The fish were fed commercial floating goldfish feed (Itosui) once a day ad libitum. The fish stock tanks had circulation filtration systems equipped with sand filters. The filter was cleaned every week to maintain the water quality. The health condition of the fish was judged by their appetite. All the experimental fish (mixed sex) in the present study were kept in stock tanks for over two weeks before they were used for experiments. A total of 127 goldfish were used for the present study. The sample size of each experiment was determined by the results of preliminary experiments. Our preliminary survey confirmed that the fish feed we used did not contain RT-like substances. Therefore, the sample sizes of the control groups (goldfish) were smaller than those of the experimental groups to sacrifice fewer fish. All goldfish and crucian carp experiments were conducted in the ICU.Approximately 30 wild juvenile crucian carp C. auratus subsp. 2 weighing 1.4–4.6 g were obtained from a fish merchant in Saitama Prefecture and kept in an 800-L stock tank in the same conditions as that for goldfish. A total of 16 crucian carp were used for the present study.For the experiments, fish were transferred from the stock tanks to experimental 60-L glass aquaria, which were maintained at 20 °C under a 16-h light/8-h dark (16 L/8 D) photoperiod (lights on at 06:00). The experimental aquaria had a running water system, and dechlorinated tap water was added at 20 ml/min. Plastic box filters were also set to each experimental aquarium to maintain water quality. When stock fish were transferred to experimental aquaria, fish were randomly allocated to the aquaria. All the methods for using goldfish and crucian carp were performed in accordance with the guidelines of the Animal Experimentation Committee of International Christian University. The conduct of the present study was approved by the Animal Experimentation Committee of International Christian University.Co-ingestion of feed and RT by goldfish of three different body sizesWe examined whether RT are ingested by goldfish with feed and whether the body size of fish affects the ingestion of RT using three different body sizes of fish, large, medium, and small. First, we conducted an experiment using large body size fish (N = 24; BW, 91.9 ± 21.6 g, mean and SD). Three goldfish of large body size were transferred from the stock tank to the experimental 60-L glass aquarium and kept for three days for acclimation of the environment and sinking fish feed. Fish were fed 3.0 g of large-size feed (Japan Pet Design Co. Ltd.) once a day. On the fourth day, fish were fed a mixture of RT collected from the field (ICU, 300 mg) and large feed (3.0 g). Control fish were fed only fish feed. At 90 min after feeding, the fish were transferred to a pail containing 0.05% 2-phenoxyethanol solution and deeply anesthetized. After body weight measurement, fish were dissected. We observed the intestine to determine whether RT was ingested. When RT was observed in the intestine, we collected the tips and counted the number of tips in each fish. The experimental tests were repeated eight times, and the data were combined.Second, we conducted an experiment using medium body size fish (N = 24; BW, 30.4 ± 12.4 g). Three goldfish of medium body size were transferred from the stock tank to the experimental 60-L glass aquarium and kept for three days for acclimation. Fish were fed 1.0 g of medium-size feed (Kyorin) once a day. On the fourth day, fish were fed a mixture of RT (ICU, 300 mg) and medium feed (1.0 g). Control fish were fed only fish feed. At 90 min after feeding, fish were anesthetized and dissected, and then the intestine was observed as described above. The experimental tests were repeated eight times, and the data were combined.Third, we conducted an experiment using small body size fish (N = 40; BW, 4.4 ± 1.5 g). Four goldfish of small body size were transferred from the stock tank to the experimental 60-L glass aquarium and kept for three days for acclimation. Fish were fed 0.5 g of small-size feed (Kyorin) once a day. On the fourth day, fish were fed a mixture of RT (ICU, 300 mg) and small feed (0.5 g). Because of the small size of fish, RT of small size particles (212–500 µm) were collected with sieves and used for the tests. Control fish were fed only fish feed. At 90 min after feeding, fish were anesthetized and dissected, and then the intestine was observed as described above. The experimental tests were repeated ten times, and the data were combined.In the first three experiments, all three control groups showed no ingestion of RT. From the results of the three experiments, it was clear that our experimental system was not contaminated with RT. Therefore, we omitted making control groups for further experiments to decrease the number of fish sacrificed from the standpoint of fish welfare.Fourth, we examined whether RT collected from TGU was ingested by goldfish. We conducted an experiment using large body size fish (N = 12; BW, 140.3 ± 27.0 g). Three goldfish of large body size were transferred from the stock tank to the experimental 60-L glass aquarium and kept for three days for acclimation. Fish were fed 3.0 g of large-size feed once a day. On the fourth day, fish were fed a mixture of RT (TGU, 300 mg) and large feed (3.0 g). At 90 min after feeding, fish were anesthetized and dissected, and then the intestine was observed as described above. The experimental tests were repeated four times, and the data were combined.We conducted an additional experiment with a similar design to those of the four experiments to take photographs of the fish and RT using fish of small-medium body size (N = 9; BW, 12.8 ± 2.7 g). Three fish were transferred from the stock tank to the experimental 60-L glass aquarium and kept for two days for acclimation. Fish were given 0.5 g of medium-size feed once a day. On the third day, fish were given a mixture of RT of ICU (30 pieces; size 0.5–1.0 mm) and medium feed (0.5 g). At 60 min after feeding, fish were anesthetized and dissected, and photographs of RT in the intestine were taken. The experimental tests were repeated three times, and the data were combined.Active ingestion of RT by goldfishWe examined whether goldfish actively ingest RT when RT are given without fish feed using large body size fish (N = 9; BW, 122.4 ± 20.8 g). Three fish were transferred from the stock tank to the experimental 60-L glass aquarium and kept for three days for acclimation. Fish were fed 3.0 g of large-size feed once a day. On the fourth day, fish were given 300 mg of RT (ICU) on the bottom of the aquarium. At 90 min after the placement of RT, fish were anesthetized and dissected, and then the intestine was observed as described above. The experimental tests were repeated three times, and the data were combined.Retention and elimination of ingested RT in the intestine of goldfishWe examined how long RT was retained in the intestine using large body size goldfish (N = 9; BW, 101.6 ± 11.4 g). Three goldfish were transferred from the stock tank to the experimental 60-L glass aquarium and kept for three days for acclimation. Fish were fed 3.0 g of large-size feed once a day. On Day 4, fish were given 1.0 g of RT (ICU). At 90 min after the placement of RT, each fish was individually transferred to three experimental 60-L glass aquaria. Then, each fish was fed 1.0 g of the feed. At 24 and 48 h (Day 5 and Day 6) after the transfer, we collected feces from fish and some water from the bottom of the aquaria. We observed whether RT was eliminated from the fish into the aquaria. When RT was observed in the feces and the bottom of the aquarium, we collected the RT and counted the number of RT. On Day 5, after the RT observation, each fish was fed 1.0 g of the feed. On Day 6, after RT observation in feces and water, the fish were anesthetized and dissected. We observed whether the intestine retained RT. The experimental tests were repeated three times, and the data were combined.Ingestion of RT by wild crucian carpWe examined whether wild Japanese crucian carp ingest RT. The experiment was conducted using juvenile crucian carp (N = 16, BW, 2.8 ± 0.9 g). Sixteen fish were transferred from the stock tank to three experimental 60-L glass aquaria (5 or 6 fish per aquarium) and kept for six days for acclimation. Fish were fed with 0.2 g of small-size feed once a day. On the seventh day, fish were fed a mixture of RT (ICU, 30 mg) and the small feed (0.2 g) or RT alone (30 mg). Because of the small size of fish, RT of small size particles (212–500 µm) were collected with sieves and used for the test. Control fish were fed only fish feed (0.2 g). At 6 h after feeding, fish were anesthetized and dissected, and then the intestine was observed as described above. More

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    Socioeconomic factors predict population changes of large carnivores better than climate change or habitat loss

    Our study is focussed on population trends of large carnivores; a culturally important group32, essential for regulating ecosystem function33. Large carnivores represent an important study group as their population status is unclear, with reports of devastating declines33 contrasted with remarkable recoveries23. Further, as a well-studied taxa with abundant trend and trait datasets, large carnivores present a good system to evaluate important drivers of trends without being impacted by poor inference from missing data34. Finally, as large carnivores are considered indicator species of the overall status of biodiversity within an area35, our inference may provide insight beyond our focal taxa.Population trendsWe sourced population (defined by the authors of the original studies, who reported on population trends for one or more studied groups of individuals) trend information for species in the families Canidae, Felidae, Hyaenidae, and Ursidae of the order Carnivora from two large trend datasets: CaPTrends12 and the Living Planet Database13. The CaPTrends database is the product of a semi-systematic literature search for population trends of large carnivore species (from the families listed above); the dataset possesses trend information for 50 species from locations around the world, and trends are reported in a variety of ways. The Living Planet Database contains population abundance time-series for vertebrates from thousands of sites around the world and is one of the larger population trend datasets. Combined, these datasets produce a cumulative 1123 trends (after removing duplicates and records we deemed unreliable or unsuitable), derived from >10,000 individual population estimates. In the Living Planet Database, and for most records in CaPTrends, trends are reported as a time-series of abundance (or density) estimates. We modelled these time-series with log-linear regressions, where abundance (the response) was loge transformed, and year of abundance estimates was selected as the predictor. We included a continuous Ornstein-Uhlenbeck (OU) autoregressive process to control for temporal autocorrelation in these models. The OU process estimates covariance between abundance values, under the assumption that abundances in time point 1 will be more similar to abundances in time point 2, than time-point 3, 4, 5, etc. Accounting for covariance resolves non-independence within time-series. We extracted the slope coefficient which represents the annual instantaneous rate of change, sometimes called the population growth rate (rt). Alongside the abundance time-series, CaPTrends also has three other quantitative datatypes, all of which we converted into an annual instantaneous rate of change (rt): (1) a mean finite rate of change; (2) estimates of percentage abundance change between two points in time; and (3) time-series’ of population change estimates (e.g. in year 1 the population doubled and in year 2 it halved). We converted all annual instantaneous rates of change into an annual rate of change percentage to improve interpretability. These annual rates of change ranged from −75 to 68%, but the majority of values fell within −10 to 10% (Supplementary Fig. 1a).Alongside the quantitative records, 138 populations in the CaPTrends dataset were only described qualitatively with categories: Increase, Stable, and Decrease. These qualitative records were more common for populations located in traditionally poorer-sampled countries (e.g. with lower human development), so whilst they are less informative (only describing the direction and not the magnitude), we deem them important to reduce bias (Fig. 1). As a result, we used a combination of percentage annual rates of change (N = 985) and qualitative categories (N = 138) as our response in our model (see below), representing 50 large carnivore species.CovariatesFor each population, we extracted sixteen covariates (each z-transformed) that fell into four categories: land-use, climate, governance, and traits. Our covariates were designed to cover a diverse array of factors that could influence population trends in large carnivores (Supplementary Table 1). Each covariate is described briefly in Fig. 2 with full descriptions of how variables were derived in the Supplementary material: Covariates.One of the challenges in identifying how covariates—which can vary in space and time—impact population trends is matching the spatial and temporal scale of the covariate with the population i.e. how much of the population is affected by the covariate at a given point in time. To tackle the spatial element of this problem, we used data on the area of extent of each population (e.g. how large is the spatial extent of the population or monitoring zone) to generate a circular distribution zone around the population’s coordinate centroid. We refer to this as the ‘population area’ hereafter. We then sampled covariate values within each population area, with more sampling points in larger areas (range: 13–295 sampling points, Supplementary Fig. 2b). For covariates which varied over time, we extracted the covariates across the ‘population monitoring period’, which refers to the period (from start to end year) the population was monitored for. However, as evidence suggests there can be a lag period between impact or change and any detectable changes in population abundance3, we tested how 0-, 5-, and 10-year lags in covariates changed model fits and effect sizes. We implemented these lags by extending the start of the population monitoring period backwards for each given lag e.g. for a 10-year lag, a normal population monitoring period of 1990–2000, would then capture covariates between 1980–2000. Sensitivity analysis showed a 10-year lag had the greatest balance of improved model fit, with high taxonomic and spatial coverage (see Supplementary: Sensitivity analysis).ModellingAt its core, our model is a linear mixed effects model, regressing annual rates of change against a combined 23 covariates and interactions, using random intercepts to account for phylogenetic and spatial nesting. The model was written in BUGS language and implemented in JAGS 4.3.036 via R 4.0.337. The model structure is summarised below, with a full description in Supplementary: Modelling.ResponseWe modelled our annual rate of change response with a normal error prior. However, to allow the two different types of population trend data (quantitative rates of change and qualitative descriptions of change) to be included in the same model, we treated the qualitative records as partially known. Specifically, we censored the qualitative records to indicate that the true value is unknown, but it occurs within a specified range, with annual rate changes ranging from −50 to 0%, −5 to 5%, and 0 to 50% within the decrease, stable and increase categories, respectively. The overlapping nature of these thresholds is by design, as we wanted to acknowledge that there is likely a grey area between the different categories. For instance, in one study, a 2% trend could be called stable, whilst a different study would consider this as increasing, our overlapping thresholds address this grey area. Admittedly, our category thresholds were arbitrarily selected—this is as a consequence of there being no strict rules on what population change is needed to be assigned a given category. However, despite being arbitrary, they were still carefully selected. For instance, our censoring range thresholds are similar to the range of the observed change (−75 to 68%). Further, whilst we don’t have a clear definition for what an increasing or decreasing population looks like (is it 1% or 10%), we can be confident that increasing and decreasing populations will fall above and below 0%, respectively. The stable category is most vulnerable to subjectivity, and so without clear definitions, we set a large range e.g. the maximum and minimum value we considered could be plausibly called stable was 5% and −5%, respectively.Many of the qualitative and short-term (brief monitoring period) quantitative records address known data biases as they occur in less-well represented regions, species, and time-periods (Fig. 1). However, these lower quality records can be more prone to error. As a result, we developed a weighting term within the model to inflate uncertainty around trends derived over a short timeframe, with few abundance observations, and less robust methods—see Supplementary: Modelling—Weighted error.CovariatesPrior to modelling, we identified missing values in some covariates (e.g. some species were missing Maximum longevity values), which can be problematic for inference if ignored34. We used imputation approaches38,39 to predict these missing values and recorded the associated imputation uncertainty alongside these predictions. Within our model, we accounted for uncertainty in the imputed estimates by treating imputed values of the covariates as distributions instead of point estimates. Specifically, for each imputed value we assigned a normal distribution defined by the mean and standard deviation of the imputed estimates. This approach allowed us to capture imputation uncertainty and improve inference robustness.With 16 covariates and a further seven interactive effects (23 effects in total), we were conscious of overparameterizing the model. As a result, we split these parameters into three groups: (1) core parameters—which included main effects that were considered likely drivers of population change; (2) optional parameters—which included main effects we considered interesting but with little evidence to-date of any influence on trends; and (3) interaction parameters—which includes the seven proposed interaction terms. We included our core parameters (Change in human density, Primary land loss, Population area, Body mass, Change in extreme heat, Governance, and Protected area coverage) in every model, but used Kuo and Mallick variable selection40 to identify parameters from the optional and interaction groups that improve model fit whilst balancing the risk of overfitting.Random interceptsWe used a hierarchical model structure to account for phylogenetic and spatial non-independence in the data, including species as a random intercept nested with genus, and country as a random intercept nested within sub-regions, as defined by the United Nations (https://www.un.org/about-us/member-states).Model runningWe ran the full model through three chains, each with 150,000 iterations. The first 50,000 iterations in each chain were discarded, and we only stored every 10th iteration along the chain (thinning factor of 10). We opted for a large chain and burn-in due to the model complexity, and to allow a broad selection of parameter combinations to be tested under variable selection. We assessed convergence of the full model on all parameters monitored in the sensitivity analysis, as well as the model intercept, and all 23 main and interactive effect slope coefficients. We checked the standard assumptions of a mixed effect linear model (normal residuals and heterogeneity of variance), and tested the residuals to ensure there was no spatial (Moran’s test) or phylogenetic (Pagel’s lambda) autocorrelation. We also conducted posterior predictive checks to ensure independently simulated values were broadly reminiscent of model predicted values.We report the median slope coefficient and associated credible intervals for each of the main and interactive effects, and produce marginal effect plots for a selection of important parameters. These marginal effects hold all other covariates at zero (which is the equivalent of the mean, as covariates were z-transformed).LimitationsDeveloping macro-scale models of population change is challenging as response data are biased41 and hard to summarise42, and response-covariate relationships are likely complex and numerous2. Within our workflow, we attempted to address these challenges, and overall, this allowed us to achieve a moderate model fit (conditional R2 ~ 0.4). We minimised biases in the trend data by integrating qualitative trends with quantitative estimates, which allowed us to increase the taxonomic and spatial scale of the work. However, biases are likely still present to some extent. For instance, whilst we have population trend data covering the full parameter space of our most influential variable (change in human development), we have more population trends in high human development countries (Supplementary Fig. 20)—given these biases, caution should be used when interpreting results. While we could not avoid some biases, we found inference was similar across different fragments of the data and model structures (Supplementary results: Sensitivity analysis). We also attempted to capture complexity by covering a more comprehensive array of covariates than many previous analyses, but we still lack data on likely important aspects that are cryptic and difficult to measure (e.g. poaching, persecution, culling, and the conservation benefits of being flagship species). Further, there are temporal lags between disturbance-events and observable changes in the population10 and we tested several to incorporate the lag that maximised model fit. However, it is possible that responses to different types of disturbance (e.g. habitat loss and climate change) have different lags, although this has not been quantified. Long lags (the maximum lag we explored was 10-years) may also occur and be associated with slow recoveries, but an absence of longer temporal extents in the response and covariate data largely prohibits this analysis at global scales (long temporal extent data is less available outside of the global north).Counterfactual scenariosTo explore how observed changes in land-use, climate and human development have influenced population trends, we developed three counterfactual scenarios, where we compared observed population change to predicted population change if habitat, climate, and human development remained static. For instance, in the climate change counterfactual scenario, we predicted each population trend using the global model (all covariate parameters) with available covariate data (e.g. land-use, governance and trait covariates), as well as taxa and location data (to provide sensitivity to the models varying random intercepts), but set the climate change covariate data to zero (in this case, change in extreme heat and change in drought). We then subtracted these counterfactual predictions from the observed trends to define ‘Difference in annual rate of change (%)’, whereby a positive value indicates carnivore populations would be in better shape (fewer declines) under the counterfactual scenario, and vice-versa. We summarise counterfactual scenarios by reporting the median Difference in annual rate of change and 95% quantiles across the observed 1123 populations.Socioeconomic development and non-linearity in carnivore trendsGiven the large effect of human development change on carnivore population trends within our counterfactual scenarios, we further explore the potential impacts of human development change (i.e. changes in the socioeconomic standards of society) on the dynamics of potential carnivore abundance change. Specifically, we test how changing the rate of human development growth of a hypothetical low human development country could impact carnivore abundances. We test this by simulating time series of human development change between the years 1960 and 2020 along three common development pathways for low human development countries, each given: (1) a mean rate of change in human development (%) defined as Slow (1.25%), Moderate (1.5%) and Fast (1.75%); (2) a shared deceleration rate set to −0.02% per year—a key feature of the human development data is that as human development grows, its growth rate decreases; and (3) a shared initial human development value which we set as 0.2 (a hypothetical low human development country) at year 1960 (Fig. 4a). All our selected parameter values are representative of the human development data (Supplementary Fig. 2), with the Moderate pathway being largely typical for a country with an initial human development value of 0.2, while Slow and Fast represent plausible extremes.We then used our fitted model (Fig. 2) to evaluate how the three pathways of Change in Human development would affect annual abundance of a hypothetical carnivore. This involved predicting the annual rate of change in abundance using the Change in human development pathways and the marginal effect of the Change in human development parameter from the fitted model—setting all other covariates in the model to zero, which in our z-transformed variables represents the mean. We then used the predicted annual rates of change in abundance to project carnivore abundance up to the year 2020, from an arbitrary baseline abundance of 100 in the year 1960 (Fig. 4c). These projections capture the 95% credible intervals around the human development change model coefficient, and assume constant and average values for all other effects (e.g. primary habitat loss or climate change).Reporting summaryFurther information on research design is available in the Nature Portfolio Reporting Summary linked to this article. More

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    Spatial memory predicts home range size and predation risk in pheasants

    Börger, L., Dalziel, B. D. & Fryxell, J. M. Are there general mechanisms of animal home range behaviour? A review and prospects for future research. Ecol. Lett. 11, 637–650 (2008).Article 

    Google Scholar 
    Burt, W. H. Territoriality and home range concepts as applied to mammals. J. Mammal. 24, 346 (1943).Article 

    Google Scholar 
    Darwin, C. On the Origin of Species by Means of Natural Selection (D. Appleton Co., 1859).Merkle, J., Fortin, D. & Morales, J. M. A memory‐based foraging tactic reveals an adaptive mechanism for restricted space use. Ecol. Lett. 17, 924–931 (2014).Article 
    CAS 

    Google Scholar 
    Bordes, F., Morand, S., Kelt, D. A. & Van Vuren, D. H. Home range and parasite diversity in mammals. Am. Nat. 173, 467–474 (2009).Article 

    Google Scholar 
    Morales, J. M. et al. Building the bridge between animal movement and population dynamics. Philos. Trans. R. Soc. B: Biol. Sci. 365, 2289–2301 (2010).Article 

    Google Scholar 
    Lewis, M. A. & Murray, J. D. Modelling territoriality and wolf-deer interactions. Nature 366, 738–740 (1993).Article 

    Google Scholar 
    Kelt, D. A. & Van Vuren, D. H. The ecology and macroecology of mammalian home range area. Am. Nat. 157, 637–645 (2001).Article 
    CAS 

    Google Scholar 
    Wang, M. & Grimm, V. Home range dynamics and population regulation: an individual-based model of the common shrew Sorex araneus. Ecol. Modell. 205, 397–409 (2007).Article 

    Google Scholar 
    Moorcroft, P. R., Lewis, M. A. & Crabtree, R. L. Mechanistic home range models capture spatial patterns and dynamics of coyote territories in Yellowstone. Proc. R. Soc. B: Biol. Sci. 273, 1651–1659 (2006).Article 

    Google Scholar 
    Powell, R. A. in Research Techniques in Animal Ecology Vol. 65 (eds. Boitani, L. & Fuller, T. K.) 599 (Columbia Univ. Press, 2000).Spencer, W. D. Home ranges and the value of spatial information. J. Mammal. 93, 929–947 (2012).Article 

    Google Scholar 
    Bracis, C., Gurarie, E., Van Moorter, B. & Goodwin, R. A. Memory effects on movement behavior in animal foraging. PLoS ONE 10, e0136057 (2015).Article 

    Google Scholar 
    Fagan, W. F. et al. Spatial memory and animal movement. Ecol. Lett. 16, 1316–1329 (2013).Article 

    Google Scholar 
    Powell, R. A. & Mitchell, M. S. What is a home range? J. Mammal. 93, 948–958 (2012).Article 

    Google Scholar 
    Stamps, J. Motor learning and the value of familiar space. Am. Nat. 146, 41–58 (1995).Article 

    Google Scholar 
    Gautestad, A. O. & Mysterud, I. Spatial memory, habitat auto-facilitation and the emergence of fractal home range patterns. Ecol. Modell. 221, 2741–2750 (2010).Article 

    Google Scholar 
    Gautestad, A. O. & Mysterud, I. Intrinsic scaling complexity in animal dispersion and abundance. Am. Nat. 165, 44–55 (2005).Article 

    Google Scholar 
    Merkle, J. A., Potts, J. R. & Fortin, D. Energy benefits and emergent space use patterns of an empirically parameterized model of memory‐based patch selection. Oikos 126, 185–196 (2017).Schlägel, U. E. & Lewis, M. A. Detecting effects of spatial memory and dynamic information on animal movement decisions. Methods Ecol. Evolution 5, 1236–1246 (2014).Article 

    Google Scholar 
    Van Moorter, B. et al. Memory keeps you at home: a mechanistic model for home range emergence. Oikos 118, 641–652 (2009).Article 

    Google Scholar 
    Riotte-Lambert, L., Benhamou, S. & Chamaillé-Jammes, S. How memory-based movement leads to nonterritorial spatial segregation. Am. Naturalist 185, E103–E116 (2015).Article 

    Google Scholar 
    Marchand, P. et al. Combining familiarity and landscape features helps break down the barriers between movements and home ranges in a non‐territorial large herbivore. J. Anim. Ecol. 86, 371–383 (2017).Article 

    Google Scholar 
    Gautestad, A. O., Loe, L. E. & Mysterud, A. Inferring spatial memory and spatiotemporal scaling from GPS data: comparing red deer Cervus elaphus movements with simulation models. J. Anim. Ecol. 82, 572–586 (2013).Article 

    Google Scholar 
    Ranc, N., Cagnacci, F. & Moorcroft, P. R. Memory drives the formation of animal home ranges: evidence from a reintroduction. Ecol. Lett. 25, 716–728 (2022).Article 

    Google Scholar 
    Ranc, N., Moorcroft, P. R., Ossi, F. & Cagnacci, F. Experimental evidence of memory-based foraging decisions in a large wild mammal. Proc. Natl Acad. Sci. USA 118, e2014856118 (2021).Article 
    CAS 

    Google Scholar 
    Potts, J. R. & Lewis, M. A. A mathematical approach to territorial pattern formation. Am. Math. Monthly 121, 754–770 (2014).Article 

    Google Scholar 
    Shettleworth, S. J. Cognition, Evolution, and Behavior (Oxford Univ. Press, 2009).van Asselen, M. et al. Brain areas involved in spatial working memory. Neuropsychologia 44, 1185–1194 (2006).Article 

    Google Scholar 
    Paul, C., Magda, G. & Abel, S. Spatial memory: theoretical basis and comparative review on experimental methods in rodents. Behav. Brain Res. 203, 151–164 (2009).Article 

    Google Scholar 
    Boratyński, Z. Energetic constraints on mammalian home-range size. Funct. Ecol. 34, 468–474 (2020).Article 

    Google Scholar 
    Tamburello, N., Côté, I. M. & Dulvy, N. K. Energy and the scaling of animal space use. Am. Naturalist 186, 196–211 (2015).Article 

    Google Scholar 
    McNab, B. K. Bioenergetics and the determination of home range size. Am. Naturalist 97, 133–140 (1963).Article 

    Google Scholar 
    McNab, B. K. Food habits, energetics, and the population biology of mammals. Am. Naturalist 116, 106–124 (1980).Article 

    Google Scholar 
    Fokidis, H. B., Risch, T. S. & Glenn, T. C. Reproductive and resource benefits to large female body size in a mammal with female-biased sexual size dimorphism. Anim. Behav. 73, 479–488 (2007).Article 

    Google Scholar 
    Saïd, S. et al. What shapes intra-specific variation in home range size? A case study of female roe deer. Oikos 118, 1299–1306 (2009).Article 

    Google Scholar 
    Schradin, C. et al. Female home range size is regulated by resource distribution and intraspecific competition: a long-term field study. Anim. Behav. 79, 195–203 (2010).Article 

    Google Scholar 
    Dröge, E., Creel, S., Becker, M. S. & M’soka, J. Risky times and risky places interact to affect prey behaviour. Nat. Ecol. Evolution 1, 1123–1128 (2017).Article 

    Google Scholar 
    Croston, R., Branch, C., Kozlovsky, D., Dukas, R. & Pravosudov, V. Heritability and the evolution of cognitive traits. Behav. Ecol. 26, 1447–1459 (2015).Article 

    Google Scholar 
    Ashton, B. J., Ridley, A. R., Edwards, E. K. & Thornton, A. Cognitive performance is linked to group size and affects fitness in Australian magpies. Nature 554, 364–367 (2018).Article 
    CAS 

    Google Scholar 
    Madden, J. R., Langley, E. J. G., Whiteside, M. A., Beardsworth, C. E. & Van Horik, J. O. The quick are the dead: pheasants that are slow to reverse a learned association survive for longer in the wild. Philos. Trans. R. Soc. B. Biol. Sci. https://doi.org/10.1098/rstb.2017.0297 (2018).Sonnenberg, B. R., Branch, C. L., Pitera, A. M., Bridge, E. & Pravosudov, V. V. Natural selection and spatial cognition in wild food-caching mountain chickadees. Curr. Biol. 29, 670–676 (2019).Article 
    CAS 

    Google Scholar 
    Shaw, R. C., MacKinlay, R. D., Clayton, N. S. & Burns, K. C. Memory performance influences male reproductive success in a wild bird. Curr. Biol. 29, 1498–1502.e3 (2019).Article 
    CAS 

    Google Scholar 
    Gehr, B. et al. Stay home, stay safe—site familiarity reduces predation risk in a large herbivore in two contrasting study sites. J. Anim. Ecol. 89, 1329–1339 (2020).Article 

    Google Scholar 
    Palmer, M. S., Fieberg, J., Swanson, A., Kosmala, M. & Packer, C. A ‘dynamic’ landscape of fear: prey responses to spatiotemporal variations in predation risk across the lunar cycle. Ecol. Lett. 20, 1364–1373 (2017).Article 
    CAS 

    Google Scholar 
    Willems, E. P. & Hill, R. A. Predator-specific landscapes of fear and resource distribution: effects on spatial range use. Ecology 90, 546–555 (2009).Article 

    Google Scholar 
    Gaynor, K. M., Brown, J. S., Middleton, A. D., Power, M. E. & Brashares, J. S. Landscapes of fear: spatial patterns of risk perception and response. Trends Ecol. Evolution 34, 355–368 (2019).Article 

    Google Scholar 
    Bose, S. et al. Implications of fidelity and philopatry for the population structure of female black-tailed deer. Behav. Ecol. 28, 983–990 (2017).Article 

    Google Scholar 
    Forrester, T. D., Casady, D. S. & Wittmer, H. U. Home sweet home: fitness consequences of site familiarity in female black-tailed deer. Behav. Ecol. Sociobiol. 69, 603–612 (2015).Article 

    Google Scholar 
    Magrath, R. D., Haff, T. M., Fallow, P. M. & Radford, A. N. Eavesdropping on heterospecific alarm calls: from mechanisms to consequences. Biol. Rev. 90, 560–586 (2015).Article 

    Google Scholar 
    Skelhorn, J. & Rowe, C. Cognition and the evolution of camouflage. Proc. R. Soc. B: Biol. Sci. 283, 20152890 (2016).Article 

    Google Scholar 
    Dickinson, A. Associative learning and animal cognition. Philos. Trans. R. Soc. B: Biol. Sci. 367, 2733–2742 (2012).Article 

    Google Scholar 
    Baddeley, A. D. & Lieberman, K. in Exploring Working Memory 206–223 (Routledge, 2017).Olton, D. S. & Samuelson, R. J. Remembrance of places passed: spatial memory in rats. J. Exp. Psychol. Anim. Behav. Process. 2, 97–116 (1976).Article 

    Google Scholar 
    Lashley, K. S. Brain Mechanisms and Intelligence: A Quantitative Study of Injuries to the Brain (Univ. Chicago Press, 1929).O’keefe, J. & Nadel, L. The Hippocampus as a Cognitive Map (Oxford Univ. Press, 1978).Beardsworth, C. E. et al. Is habitat selection in the wild shaped by individual-level cognitive biases in orientation strategy? Ecol. Lett. 24, 751–760 (2021).Article 

    Google Scholar 
    Rowe, C. & Healy, S. D. Measuring variation in cognition. Behav. Ecol. 25, 1287–1292 (2014).Article 

    Google Scholar 
    Warner, R. E. Use of cover by pheasant broods in east-central Illinois. J. Wildl. Manag. 43, 334 (1979).Article 

    Google Scholar 
    Toledo, S. et al. Cognitive map-based navigation in wild bats revealed by a new high-throughput tracking system. Science 369, 188–193 (2020).Article 
    CAS 

    Google Scholar 
    Weiser, A. W. et al. Characterizing the accuracy of a self-synchronized reverse-GPS wildlife localization system. In Proc. 2016 15th ACM/IEEE International Conference on Information Processing in Sensor Networks, IPSN 2016 1–12 (IEEE, 2016).Nathan, R. et al. Big-data approaches lead to an increased understanding of the ecology of animal movement. Science 375, eabg1780 (2022).Article 
    CAS 

    Google Scholar 
    Beardsworth, C. E. et al. Validating ATLAS: a regional-scale high-throughput tracking system. Methods Ecol. Evolution 13, 1990–2004 (2022).Article 

    Google Scholar 
    Calabrese, J. M., Fleming, C. H. & Gurarie, E. ctmm: an r package for analyzing animal relocation data as a continuous-time stochastic process. Methods Ecol. Evolution 7, 1124–1132 (2016).Article 

    Google Scholar 
    Clutton‐Brock, T. H. & Harvey, P. H. Primates, brains and ecology. J. Zool. 190, 309–323 (1980).Article 

    Google Scholar 
    Avgar, T. et al. Space-use behaviour of woodland caribou based on a cognitive movement model. J. Anim. Ecol. 84, 1059–1070 (2015).Article 

    Google Scholar 
    Laundré, J. W., Hernández, L. & Ripple, W. J. The landscape of fear: ecological implications of being afraid. Open Ecol. J. 3, 1–7 (2010).Article 

    Google Scholar 
    Stephens, D. W. & Krebs, J. R. Foraging Theory (Princeton Univ. Press, 2019).Beauchamp, G. Animal Vigilance: Monitoring Predators and Competitors. Animal Vigilance: Monitoring Predators and Competitors (Elsevier, 2015).Langley, E. J. G. et al. Heritability and correlations among learning and inhibitory control traits. Behav. Ecol. 31, 798–806 (2020).Article 

    Google Scholar 
    Chen, J., Zou, Y., Sun, Y.-H. & Ten Cate, C. Problem-solving males become more attractive to female budgerigars. Science 363, 166–167 (2019).Article 
    CAS 

    Google Scholar 
    Vale, R., Evans, D. A. & Branco, T. Rapid spatial learning controls instinctive defensive behavior in mice. Curr. Biol. 27, 1342–1349 (2017).Article 
    CAS 

    Google Scholar 
    Burt de Perera, T. & Guilford, T. Rapid learning of shelter position in an intertidal fish, the shanny Lipophrys pholis L. J. Fish. Biol. 72, 1386–1392 (2008).Article 

    Google Scholar 
    Font, E. Rapid learning of a spatial memory task in a lacertid lizard (Podarcis liolepis). Behav. Procs. 169, 103963 (2019).Article 

    Google Scholar 
    Senar, J. & Pascual, J. Keel and tarsus length may provide a good predictor of avian body size. Ard.-Wageningen 85, 269–274 (1997).
    Google Scholar 
    Lavielle, M. Detection of multiple changes in a sequence of dependent variables. Stoch. Process. Appl. 83, 79–102 (1999).Article 

    Google Scholar 
    Calenge, C. The package ‘adehabitat’ for the R software: a tool for the analysis of space and habitat use by animals. Ecol. Modell. 197, 516–519 (2006).Article 

    Google Scholar 
    Millspaugh, J. J. A Manual for Wildlife Radio Tagging Robert E. Kenward. The Auk 118 (Academic Press, 2001).Gupte, P. R. et al. A guide to pre-processing high-throughput animal tracking data. J. Anim. Ecol. 91, 287–307 (2022).Article 

    Google Scholar 
    R Development Core Team. R: A Language and Environment for Statistical Computing (R Foundation for Statistical Computing, 2018).Grahn, M., Göransson, G. & Von Schantz, T. Territory acquisition and mating success in pheasants, Phasianus colchicus: an experiment. Anim. Behav. 46, 721–730 (1993).Article 

    Google Scholar 
    Ridley, M. W. & Hill, D. A. Social organization in the pheasant (Phasianus colchicus): harem formation, mate selection and the role of mate guarding. J. Zool. 211, 619–630 (1987).Article 

    Google Scholar 
    Gompper, M. E. & Gittleman, J. L. Home range scaling: intraspecific and comparative trends. Oecologia 87, 343–348 (1991).Article 

    Google Scholar 
    Fisher, R. A. in Breakthroughs in Statistics (eds Kotz, S. & Johnson, N. L.) 66–70 (Springer, 1992).Barton, K. MuMIn: Multi-Model Inference (cran.r-project.org, 2022).Nakagawa, S. A farewell to Bonferroni: the problems of low statistical power and publication bias. Behav. Ecol. 15, 1044–1045 (2004).Article 

    Google Scholar 
    Heathcote, R. Data for ‘Spatial memory predicts home range size and predation risk in pheasants’ nature ecology and evolution. Mendeley Data https://doi.org/10.17632/m89226xg6p.1 (2022). More

  • in

    Increasing body-size variation in many downsizing North American mammals and birds

    Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.This is a summary of: Zheng, S., Hu, J., Ma, Z., Lindenmayer, D. & Liu, J. Increases in intraspecific body size variation are common amongst North American mammals and birds between 1880 and 2020. Nat. Ecol. Evol., https://doi.org/10.1038/s41559-022-01967-w (2023). More

  • in

    Memory pays off

    Burt, W. H. J. Mamm. 24, 346–352 (1943).Article 

    Google Scholar 
    Heathcote, R. J. P. et al. Nature Ecol. Evol. https://doi.org/10.1038/s41559-022-01950-5 (2023).Article 

    Google Scholar 
    Moorcroft, P. R., Lewis, M. A. & Crabtree, R. L. Proc. R. Soc. Lond. B 273, 1651–1659 (2006).
    Google Scholar 
    Moorcroft, P. R. & Barnett, A. Ecology 89, 1112–1119 (2008).Article 

    Google Scholar 
    Hattori, A. & Takuro, S. J. Mar. Biol. Assoc. U.K. 93, 2265–2272 (2013).Article 

    Google Scholar 
    Van Moorter, B. et al. Oikos 118, 641–652 (2009).Article 

    Google Scholar 
    Merkle, J. A., Potts, J. R. & Fortin, D. Oikos 126, https://doi.org/10.1111/oik.03356 (2017).Bracis, C., Gurarie, E., Van Moorter, B. & Goodwin, R. A. PLoS ONE 10, e0136057 (2015).Article 

    Google Scholar 
    Ranc, N., Cagnacci, F. & Moorcroft, P. R. Ecol. Lett. 25, 716–728 (2022).Article 

    Google Scholar 
    Schlägel, U. E. & Lewis, M. A. Methods Ecol. Evol. 5, 1236–1246 (2014).Article 

    Google Scholar 
    Ranc, N., Moorcroft, P. R., Ossi, F. & Cagnacci, F. Proc. Natl Acad. Sci. USA 118, e2014856118 (2021).Article 
    CAS 

    Google Scholar 
    Ranc, N. et al. Sci. Rep. 10, 11946 (2020).Merkle, J. A., Fortin, D. & Morales, J. M. Ecol. Lett. 17, 924–931 (2014).Article 
    CAS 

    Google Scholar 
    Gaynor, K. M., Brown, J. S., Middleton, A. D., Power, M. E. & Brashares, J. S. Trends Ecol. Evol. 34, 355–368 (2019).Article 

    Google Scholar 
    Rigoudy, N. L. A. et al. Behav. Ecol. 33, 789–797 (2022).Article 

    Google Scholar 
    Forrester, T. D., Casady, D. S. & Wittmer, H. U. Behav. Ecol. Sociobiol. 69, 603–612 (2015).Article 

    Google Scholar 
    Jesmer, B. R. et al. Science 361, 1023–1025 (2018).Article 
    CAS 

    Google Scholar  More

  • in

    Increases in intraspecific body size variation are common among North American mammals and birds between 1880 and 2020

    Bradshaw, W. E. & Holzapfel, C. M. Evolutionary response to rapid climate change. Science 312, 1477–1478 (2006).Article 
    CAS 

    Google Scholar 
    Sheridan, J. A. & Bickford, D. Shrinking body size as an ecological response to climate change. Nat. Clim. Change 1, 401–406 (2011).Article 

    Google Scholar 
    Audzijonyte, A. et al. Fish body sizes change with temperature but not all species shrink with warming. Nat. Ecol. Evol. 4, 809–814 (2020).Article 

    Google Scholar 
    Gardner, J. L., Heinsohn, R. & Joseph, L. Shifting latitudinal clines in avian body size correlate with global warming in Australian passerines. Proc. R. Soc. B 276, 3845–3852 (2009).Article 

    Google Scholar 
    Bergmann C. Über die Verhältnisse der Wärmeökonomie der Thiere zu ihrer Grösse (Göttinger Studien, 1847).Gardner, J. L., Peters, A., Kearney, M. R., Joseph, L. & Heinsohn, R. Declining body size: a third universal response to warming? Trends Ecol. Evol. 26, 285–291 (2011).Article 

    Google Scholar 
    Darimont, C. T. et al. Human predators outpace other agents of trait change in the wild. Proc. Natl Acad. Sci. USA 106, 952–954 (2009).Article 
    CAS 

    Google Scholar 
    van Gils, J. A. et al. Body shrinkage due to Arctic warming reduces red knot fitness in tropical wintering range. Science 352, 819–821 (2016).Article 

    Google Scholar 
    Ryding, S., Klaassen, M., Tattersall, G. J., Gardner, J. L. & Symonds, M. R. E. Shape-shifting: changing animal morphologies as a response to climatic warming. Trends Ecol. Evol. 36, 1036–1048 (2021).Article 

    Google Scholar 
    Des Roches, S. et al. The ecological importance of intraspecific variation. Nat. Ecol. Evol. 2, 57–64 (2018).Article 

    Google Scholar 
    Enquist, B. J. et al. Scaling from traits to ecosystems: developing a general trait driver theory via integrating trait-based and metabolic scaling theories. Adv. Ecol. Res 52, 249–318 (2015).Article 

    Google Scholar 
    González-Suárez, M. & Revilla, E. Variability in life-history and ecological traits is a buffer against extinction in mammals. Ecol. Lett. 16, 242–251 (2013).Article 

    Google Scholar 
    Ducatez, S., Sol, D., Sayol, F. & Lefebvre, L. Behavioural plasticity is associated with reduced extinction risk in birds. Nat. Ecol. Evol. 4, 788–793 (2020).Article 

    Google Scholar 
    Brady, S. P. et al. Causes of maladaptation. Evol. Appl. 12, 1229–1242 (2019).Article 

    Google Scholar 
    Scheele, B. C., Foster, C. N., Banks, S. C. & Lindenmayer, D. B. Niche contractions in declining species: mechanisms and consequences. Trends Ecol. Evol. 32, 346–355 (2017).Article 

    Google Scholar 
    Campbell-Staton, S. C. et al. Ivory poaching and the rapid evolution of tusklessness in African elephants. Science 374, 483–487 (2021).Article 
    CAS 

    Google Scholar 
    Thompson M. J., Capilla-Lasheras P., Dominoni D. M., Réale D. & Charmantier A. Phenotypic variation in urban environments: mechanisms and implications. Trends Ecol. Evol. 37, 171–182 (2022).Starrfelt, J. & Kokko, H. Bet-hedging—a triple trade-off between means, variances and correlations. Biol. Rev. 87, 742–755 (2012).Article 

    Google Scholar 
    Heino, M., Díaz Pauli, B. & Dieckmann, U. Fisheries-induced evolution. Annu. Rev. Ecol. Evol. Syst. 46, 461–480 (2015).Article 

    Google Scholar 
    Kindsvater, H. K. & Palkovacs, E. P. Predicting eco-evolutionary impacts of fishing on body size and trophic role of Atlantic cod. Copeia 105, 475–482 (2017).Article 

    Google Scholar 
    Hantak, M. M., McLean, B. S., Li, D. & Guralnick, R. P. Mammalian body size is determined by interactions between climate, urbanization, and ecological traits. Commun. Biol. 4, 972 (2021).Article 

    Google Scholar 
    Freckleton, R. P., Harvey, P. H. & Pagel, M. Bergmann’s rule and body size in mammals. Am. Nat. 161, 821–825 (2003).Article 

    Google Scholar 
    Riddell, E. A., Odom, J. P., Damm, J. D. & Sears, M. W. Plasticity reveals hidden resistance to extinction under climate change in the global hotspot of salamander diversity. Sci. Adv. 4, eaar5471 (2018).Article 

    Google Scholar 
    Cooke, R. S. C., Eigenbrod, F. & Bates, A. E. Projected losses of global mammal and bird ecological strategies. Nat. Commun. 10, 2279 (2019).Article 

    Google Scholar 
    Yang, J. et al. Large underestimation of intraspecific trait variation and its improvements. Front. Plant Sci. 11, 53 (2020).Article 

    Google Scholar 
    Olsen, E. M. et al. Maturation trends indicative of rapid evolution preceded the collapse of northern cod. Nature 428, 932–935 (2004).Article 
    CAS 

    Google Scholar 
    Antonson, N. D., Rubenstein, D. R., Hauber, M. E. & Botero, C. A. Ecological uncertainty favours the diversification of host use in avian brood parasites. Nat. Commun. 11, 4185 (2020).Article 

    Google Scholar 
    Rode, K. D., Amstrup, S. C. & Regehr, E. V. Reduced body size and cub recruitment in polar bears associated with sea ice decline. Ecol. Appl. 20, 768–782 (2010).Article 

    Google Scholar 
    Edeline, E. et al. Harvest-induced disruptive selection increases variance in fitness-related traits. Proc. R. Soc. B 276, 4163–4171 (2009).Article 

    Google Scholar 
    Hays, G. C. et al. Changes in mean body size in an expanding population of a threatened species. Proc. R Soc. B https://doi.org/10.1098/rspb.2022.0696 (2022).Halfwerk, W. et al. Adaptive changes in sexual signalling in response to urbanization. Nat. Ecol. Evol. 3, 374–380 (2019).Article 

    Google Scholar 
    Fernández-Chacón, A. et al. Protected areas buffer against harvest selection and rebuild phenotypic complexity. Ecol. Appl. 30, e02108 (2020).Article 

    Google Scholar 
    Sánchez-Tójar, A., Moran, N. P., O’Dea, R. E., Reinhold, K. & Nakagawa, S. Illustrating the importance of meta-analysing variances alongside means in ecology and evolution. J. Evol. Biol. 33, 1216–1223 (2020).Article 

    Google Scholar 
    Reed, T. E., Waples, R. S., Schindler, D. E., Hard, J. J. & Kinnison, M. T. Phenotypic plasticity and population viability: the importance of environmental predictability. Proc. R. Soc. B 277, 3391–3400 (2010).Article 

    Google Scholar 
    Klump, B. C. et al. Innovation and geographic spread of a complex foraging culture in an urban parrot. Science 373, 456–460 (2021).Article 
    CAS 

    Google Scholar 
    Bosse, M. et al. Recent natural selection causes adaptive evolution of an avian polygenic trait. Science 358, 365–368 (2017).Article 
    CAS 

    Google Scholar 
    Singer, M. C. & Parmesan, C. Lethal trap created by adaptive evolutionary response to an exotic resource. Nature 557, 238–241 (2018).Article 
    CAS 

    Google Scholar 
    Usui, R., Sheeran, L. K., Asbury, A. M. & Blackson, M. Impacts of the COVID-19 pandemic on mammals at tourism destinations: a systematic review. Mamm. Rev. 51, 492–507 (2021).Article 

    Google Scholar 
    Meineke, E. K. & Daru, B. H. Bias assessments to expand research harnessing biological collections. Trends Ecol. Evol. 36, 1071–1082 (2021).Article 

    Google Scholar 
    The IUCN Red List of Threatened Species. Version 2021-2 (IUCN, accessed November 2021); https://www.iucnredlist.orgBoyd, R. J. et al. ROBITT: a tool for assessing the risk-of-bias in studies of temporal trends in ecology. Methods Ecol. Evol. 13, 1497–1507 (2022).Article 

    Google Scholar 
    Thornton, P. K., Ericksen, P. J., Herrero, M. & Challinor, A. J. Climate variability and vulnerability to climate change: a review. Glob. Change Biol. 20, 3313–3328 (2014).Article 

    Google Scholar 
    Botero, C. A., Weissing, F. J., Wright, J. & Rubenstein, D. R. Evolutionary tipping points in the capacity to adapt to environmental change. Proc. Natl Acad. Sci. USA 112, 184–189 (2015).Article 
    CAS 

    Google Scholar 
    Niklas, K. J. The scaling of plant and animal body mass, length, and diameter. Evolution 48, 44–54 (1994).Article 
    CAS 

    Google Scholar 
    Van Valen, L. Morphological variation and width of ecological niche. Am. Nat. 99, 377–390 (1965).Article 

    Google Scholar 
    Gaillard, J. M. et al. Generation time: a reliable metric to measure life-history variation among mammalian populations. Am. Nat. 166, 119–123 (2005).Article 

    Google Scholar 
    Postma, E. in Quantitative Genetics in the Wild (eds Charmantier, A. et al.) 16–33 (Oxford Univ. Press, 2014).Jones, K. E. et al. PanTHERIA: a species‐level database of life history, ecology, and geography of extant and recently extinct mammals. Ecology 90, 2648–2648 (2009).Article 

    Google Scholar 
    R Core Team. R: A Language and Environment for Statistical Computing (R Foundation for Statistical Computing, 2022).Bates D., Mächler M., Bolker B. & Walker S. Fitting linear mixed-effects models using lme4. J. Stat. Softw. 67, 1–48 (2015).Ives, A. R., Dinnage, R., Nell, L. A., Helmus, M. & Li, D. phyr: Model based phylogenetic analysis. R package version 1.1.0 https://CRAN.R-project.org/package=phyr (2020).Upham, N. S., Esselstyn, J. A. & Jetz, W. Inferring the mammal tree: species-level sets of phylogenies for questions in ecology, evolution, and conservation. PLoS Biol. 17, e3000494 (2019).Article 
    CAS 

    Google Scholar 
    Jetz, W., Thomas, G. H., Joy, J. B., Hartmann, K. & Mooers, A. O. The global diversity of birds in space and time. Nature 491, 444–448 (2012).Article 
    CAS 

    Google Scholar 
    Suchard, M. A. et al. Bayesian phylogenetic and phylodynamic data integration using BEAST 1.10. Virus Evol. 4, vey016 (2018).Article 

    Google Scholar 
    Hurlbert, S. H. & Lombardi, C. M. Final collapse of the Neyman–Pearson decision theoretic framework and rise of the neoFisherian. Ann. Zool. Fenn. 46, 311–349 (2009).Article 

    Google Scholar  More

  • in

    Climate change threatens unique evolutionary diversity in Australian kelp refugia

    Krumhansl, K. A. et al. Global patterns of kelp forest change over the past half-century. Proc. Natl. Acad. Sci. 113(48), 13785–13790. https://doi.org/10.1073/pnas.1606102113 (2016).Article 
    ADS 
    CAS 

    Google Scholar 
    Wernberg, T. et al. Biology and ecology of the globally significant kelp Ecklonia radiata. Oceanogr. Mar. Biol. https://doi.org/10.1201/9780429026379-6 (2019).Article 

    Google Scholar 
    Bennett, S. et al. The ‘Great Southern Reef’: Social, ecological and economic value of Australia’s neglected kelp forests. Mar. Freshw. Res. 67(1), 47–56. https://doi.org/10.1071/MF15232 (2015).Article 

    Google Scholar 
    Eger, A. et al. The economic value of fisheries, blue carbon, and nutrient cycling in global marine forests. EcoEvoRxiv. https://doi.org/10.32942/osf.io/n7kjs (2021).Article 

    Google Scholar 
    Smith, K. E. et al. Socioeconomic impacts of marine heatwaves: Global issues and opportunities. Science 374, 6566. https://doi.org/10.1126/science.abj3593 (2021).Article 
    CAS 

    Google Scholar 
    Coleman, M. et al. Loss of a globally unique kelp forest and genetic diversity from the northern hemisphere. Sci. Rep. 12, 5020. https://doi.org/10.1038/s41598-022-08264-3 (2022).Article 
    ADS 
    CAS 

    Google Scholar 
    Vergés, A. et al. Long-term empirical evidence of ocean warming leading to tropicalization of fish communities, increased herbivory, and loss of kelp. Proc. Natl. Acad. Sci. 113(48), 13791–13796. https://doi.org/10.1073/pnas.1610725113 (2016).Article 
    ADS 
    CAS 

    Google Scholar 
    Wernberg, T. et al. Climate-driven regime shift of a temperate marine ecosystem. Science 353(6295), 169–172. https://doi.org/10.1126/science.aad8745 (2016).Article 
    ADS 
    CAS 

    Google Scholar 
    Wood, G. et al. Genomic vulnerability of a dominant seaweed points to future-proofing pathways for Australia’s underwater forests. Glob. Change Biol. 27(10), 2200–2212. https://doi.org/10.1111/gcb.15534 (2021).Article 
    ADS 
    CAS 

    Google Scholar 
    Vranken, S. et al. Genotype-environment mismatch of kelp forests under climate change. Mol. Ecol. 30(15), 3730. https://doi.org/10.1111/mec.15993 (2021).Article 

    Google Scholar 
    Assis, J. et al. Deep reefs are climatic refugia for genetic diversity of marine forests. J. Biogeogr. 43(4), 833–844. https://doi.org/10.1111/jbi.12677 (2016).Article 

    Google Scholar 
    Lourenço, C. R. et al. Upwelling areas as climate change refugia for the distribution and genetic diversity of a marine macroalga. J. Biogeogr. 43(8), 1595–1607. https://doi.org/10.1111/jbi.12744 (2016).Article 

    Google Scholar 
    Graham, M. H., Kinlan, B. P., Druehl, L. D., Garske, L. E. & Banks, S. Deep-water kelp refugia as potential hotspots of tropical marine diversity and productivity. Proc. Natl. Acad. Sci. 104(42), 16576–16580. https://doi.org/10.1073/pnas.0704778104 (2007).Article 
    ADS 

    Google Scholar 
    Marzinelli, E. M. et al. Large-scale geographic variation in distribution and abundance of Australian deep-water kelp forests. PLoS ONE 10, e0118390. https://doi.org/10.1371/journal.pone.0118390 (2015).Article 
    CAS 

    Google Scholar 
    Coleman, M. A. et al. Variation in the strength of continental boundary currents determines continent-wide connectivity in kelp. J. Ecol. 99(4), 1026–1032. https://doi.org/10.1111/j.1365-2745.2011.01822.x (2011).Article 

    Google Scholar 
    Hampe, A. & Petit, R. J. Conserving biodiversity under climate change: The rear edge matters. Ecol. Lett. 8(5), 461–467. https://doi.org/10.1111/j.1461-0248.2005.00739.x (2005).Article 

    Google Scholar 
    Maggs, C. A. et al. Evaluating signatures of glacial refugia for North Atlantic benthic marine taxa. Ecology 89(sp11), S108–S122. https://doi.org/10.1890/08-0257.1 (2008).Article 

    Google Scholar 
    Grant, W. S., Lydon, A. & Bringloe, T. T. Phylogeography of split kelp Hedophyllum nigripes: Northern ice-age refugia and trans-Arctic dispersal. Polar Biol. 43, 1829–1841. https://doi.org/10.1007/s00300-020-02748-6 (2020).Article 

    Google Scholar 
    Hoarau, G., Coyer, J. A., Veldsink, J. H., Stam, W. T. & Olsen, J. L. Glacial refugia and recolonization pathways in the brown seaweed Fucus serratus. Mol. Ecol. 16(17), 3606–3616. https://doi.org/10.1111/j.1365-294X.2007.03408.x (2007).Article 
    CAS 

    Google Scholar 
    Fraser, C. I., Nikula, R., Spencer, H. G. & Waters, J. M. Kelp genes reveal effects of subantarctic sea ice during the Last Glacial Maximum. Proc. Natl. Acad. Sci. 106(9), 3249–3253. https://doi.org/10.1073/pnas.0810635106 (2009).Article 
    ADS 

    Google Scholar 
    Assis, J. et al. Past climate changes and strong oceanographic barriers structured low-latitude genetic relics for the golden kelp Laminaria ochroleuca. J. Biogeogr. 45(10), 2326–2336. https://doi.org/10.1111/jbi.13425 (2018).Article 

    Google Scholar 
    Gersonde, R., Crosta, X., Abelmann, A. & Armand, L. Sea-surface temperature and sea ice distribution of the Southern Ocean at the EPILOG last glacial maximum—A circum-Antarctic view based on siliceous microfossil records. Quat. Sci. Rev. 24(7–9), 869–896. https://doi.org/10.1016/j.quascirev.2004.07.015 (2005).Article 
    ADS 

    Google Scholar 
    Bostock, H. C., Opdyke, B. N., Gagan, M. K., Kiss, A. E. & Fifield, L. K. Glacial/interglacial changes in the East Australian current. Clim. Dyn. 26, 645–659. https://doi.org/10.1007/s00382-005-0103-7 (2006).Article 

    Google Scholar 
    Brooke, B. P., Nichol, S. L., Huang, Z. & Beaman, R. J. Palaeoshorelines on the Australian continental shelf: Morphology, sea-level relationship and applications to environmental management and archaeology. Cont. Shelf Res. 134, 26–38. https://doi.org/10.1016/j.csr.2016.12.012 (2017).Article 
    ADS 

    Google Scholar 
    Williams, A. N., Ulm, S., Sapienza, T., Lewis, S. & Turney, C. S. M. Sea-level change and demography during the last glacial termination and early Holocene across the Australian continent. Quat. Sci. Rev. 182, 144–154. https://doi.org/10.1016/j.quascirev.2017.11.030 (2018).Article 
    ADS 

    Google Scholar 
    Durrant, H. M. S., Barrett, N. S., Edgar, G. J., Coleman, M. A. & Burridge, C. P. Shallow phylogeographic histories of key species in a biodiversity hotspot. Phycologia 54(6), 556–565. https://doi.org/10.2216/15-24.1 (2015).Article 

    Google Scholar 
    O’Hara, T. D. & Poore, G. C. B. Patterns of distribution for southern Australian marine echinoderms and decapods. J. Biogeogr. 27(6), 1321–1335. https://doi.org/10.1046/j.1365-2699.2000.00499.x (2000).Article 

    Google Scholar 
    Waters, J. M. Marine biogeographical disjunction in temperate Australia: Historical landbridge, contemporary currents, or both? Divers. Distrib. 14(4), 692–700. https://doi.org/10.1111/j.1472-4642.2008.00481.x (2008).Article 

    Google Scholar 
    Davis, T. R., Champion, C. & Coleman, M. A. Climate refugia for kelp within an ocean warming hotspot revealed by stacked species distribution modelling. Mar. Environ. Res. 166, 105267. https://doi.org/10.1016/j.marenvres.2021.105267 (2021).Article 
    CAS 

    Google Scholar 
    Barrows, T. T. & Juggins, S. Sea-surface temperatures around the Australian margin and Indian Ocean during the last glacial maximum. Quat. Sci. Rev. 24(7–9), 1017–1047. https://doi.org/10.1016/j.quascirev.2004.07.020 (2005).Article 
    ADS 

    Google Scholar 
    Richmond, S. & Stevens, T. Classifying benthic biotopes on sub-tropical continental shelf reefs: How useful are abiotic surrogates? Estuar. Coast. Shelf Sci. 138, 79–89. https://doi.org/10.1016/j.ecss.2013.12.012 (2014).Article 
    ADS 

    Google Scholar 
    Jordan, A. et al. Seabed Habitat Mapping of the Continental Shelf of NSW (New South Wales Department of Environment, Climate Change and Water, 2010).
    Google Scholar 
    Lewis, S. E., Sloss, C. R., Murray-Wallace, C. V., Woodroffe, C. D. & Smithers, S. G. Post-glacial sea-level changes around the Australian margin: A review. Quat. Sci. Rev. 74, 115–138. https://doi.org/10.1016/j.quascirev.2012.09.006 (2013).Article 
    ADS 

    Google Scholar 
    Millar, A. J. K. Marine benthic algae of Norfolk island, South Pacific. Aust. Syst. Bot. 12(4), 479–547. https://doi.org/10.1071/SB98004 (1999).Article 

    Google Scholar 
    Ridgway, K. R. & Dunn, J. R. Mesoscale structure of the mean East Australian current system and its relationship with topography. Prog. Oceanogr. 56, 189–222. https://doi.org/10.1016/S0079-6611(03)00004-1 (2003).Article 
    ADS 

    Google Scholar 
    Lough, J. M. & Hobday, A. J. Observed climate change in Australian marine and freshwater environments. Mar. Freshw. Res. 62(9), 984–999. https://doi.org/10.1071/MF10272 (2011).Article 

    Google Scholar 
    Sunday, J. M. et al. Species traits and climate velocity explain geographic range shifts in an ocean-warming hotspot. Ecol. Lett. 18(9), 944–953. https://doi.org/10.1111/ele.12474 (2015).Article 

    Google Scholar 
    Coleman, M. A. et al. Variation in the strength of continental boundary currents determines patterns of large-scale connectivity in kelp. J. Ecol. 99, 1026–1032 (2011).Article 

    Google Scholar 
    Maeda, T., Kawai, T., Nakaoka, M. & Yotsukura, N. Effective DNA extraction method for fragment analysis using capillary sequencer of the kelp, Saccharina. J. Appl. Phycol. 25, 337–347. https://doi.org/10.1007/s10811-012-9868-3 (2013).Article 
    CAS 

    Google Scholar 
    Lane, C. E., Lindstrom, S. C. & Saunders, G. W. A molecular assessment of northeast Pacific Alaria species (Laminariales, Phaeophyceae) with reference to the utility of DNA barcoding. Mol. Phylogenet. Evol. 44(2), 634–648. https://doi.org/10.1016/j.ympev.2007.03.016 (2007).Article 
    CAS 

    Google Scholar 
    Saunders, G. W. & McDevit, D. C. Acquiring DNA sequence data from dried archival red algae (Florideophyceae) for the purpose of applying available names to contemporary genetic species: A critical assessment. Botany 90, 191–203 (2012).Article 
    CAS 

    Google Scholar 
    Kearse, M. et al. Geneious basic: An integrated and extendable desktop software platform for the organization and analysis of sequence data. Bioinformatics 28(12), 1647–1649. https://doi.org/10.1093/bioinformatics/bts199 (2012).Article 

    Google Scholar 
    Edgar, R. C. MUSCLE: multiple sequence alignment with high accuracy and high throughput. Nucleic Acids Res. 32(5), 1792–1797. https://doi.org/10.1093/nar/gkh340 (2004).Article 
    CAS 

    Google Scholar 
    Altschul, S. F., Gish, W., Miller, W., Myers, E. W. & Lipman, D. J. Basic local alignment search tool. J. Mol. Biol. 215(3), 403–410. https://doi.org/10.1016/S0022-2836(05)80360-2 (1990).Article 
    CAS 

    Google Scholar 
    Rozas, J. et al. DnaSP 6: DNA sequence polymorphism analysis of large data sets. Mol. Biol. Evol. 34(12), 3299–3302. https://doi.org/10.1093/molbev/msx248 (2017).Article 
    CAS 

    Google Scholar 
    Clement, M., Posada, D. & Crandall, K. A. TCS: A computer program to estimate gene genealogies. Mol. Ecol. 9(10), 1657–1659. https://doi.org/10.1046/j.1365-294x.2000.01020.x (2000).Article 
    CAS 

    Google Scholar 
    Leigh, J. & Bryant, D. PopART: Full-feature software for haplotype network construction. Methods Ecol. Evol. 6(9), 1110–1116. https://doi.org/10.1111/2041-210X.12410 (2015).Article 

    Google Scholar 
    Inkscape Project. Inkscape Project. https://inkscape.org/ (2020).Coleman, M. A. et al. Connectivity within and among a network of temperate marine reserves. PLoS ONE 6(5), e20168. https://doi.org/10.1371/journal.pone.0020168 (2011).Article 
    ADS 
    CAS 

    Google Scholar 
    Davis, T. R., Cadiou, G., Champion, C. & Coleman, M. A. Environmental drivers and indicators of change in habitat and fish assemblages within a climate change hotspot. Reg. Mar. Stud. https://doi.org/10.1016/j.rsma.2020.101295 (2020).Article 

    Google Scholar 
    Mix, A. C., Bard, E. & Schneider, R. Environmental processes of the ice age: Land, oceans, glaciers (EPILOG). Quat. Sci. Rev. 20(4), 627–657. https://doi.org/10.1016/S0277-3791(00)00145-1 (2001).Article 
    ADS 

    Google Scholar 
    Waters, J. M. Competitive exclusion: Phylogeography’s ‘elephant in the room’? Mol. Ecol. 20(21), 4388–4394. https://doi.org/10.1111/j.1365-294X.2011.05286.x (2011).Article 

    Google Scholar 
    Cresswell, G. R., Peterson, J. L. & Pender, L. F. The East Australian current, upwellings and downwellings off eastern-most Australia in summer. Mar. Freshw. Res. 68(7), 1208–1223. https://doi.org/10.1071/MF16051 (2016).Article 

    Google Scholar 
    Hewitt, G. Some genetic consequences of ice ages, and their role in divergence and speciation. Biol. J. Linn. Soc. 58(3), 247–276. https://doi.org/10.1006/bijl.1996.0035 (1995).Article 

    Google Scholar 
    Waters, J. M., Fraser, C. I. & Hewitt, G. M. Founder takes all: Density-dependent processes structure biodiversity. Trends Ecol. Evol. 28(2), 78–85. https://doi.org/10.1016/j.tree.2012.08.024 (2013).Article 

    Google Scholar 
    Wernberg, T. et al. Genetic diversity and kelp forest vulnerability to climatic stress. Sci. Rep. 8(1851), 1–8. https://doi.org/10.1038/s41598-018-20009-9 (2018).Article 
    CAS 

    Google Scholar 
    Coleman, M. A. & Kelaher, B. P. Connectivity among fragmented populations of a habitat-forming alga, Phyllospora comosa (Phaeophyceae, Fucales) on an urbanised coast. Mar. Ecol. Prog. Ser. 381, 63–70 (2009).Article 
    ADS 

    Google Scholar 
    Drábková, L. Z. DNA extraction from herbarium specimens. In Molecular Plant Taxonomy. Methods in Molecular Biology Vol. 1115 (ed. Besse, P.) (Humana Press, 2014).
    Google Scholar 
    Goff, L. J. & Moon, D. A. PCR amplification of nuclear and plastid genes from algal herbarium specimens and algal spores 1. J. Phycol. 29, 381 (1993).Article 
    CAS 

    Google Scholar 
    Nahor, O., Luzzatto-Knaan, T. & Israel, A. A new genetic lineage of Asparagopsis taxiformis (Rhodophyta) in the Mediterranean Sea: As the DNA barcoding indicates a recent Lessepsian introduction. Front. Mar. Sci. https://doi.org/10.3389/fmars.2022.873817 (2022).Article 

    Google Scholar 
    Coleman, M. A. & Brawley, S. H. Variability in temperature and historical patterns in reproduction in the Fucus distichus complex (Heterokontophyta; Phaeophyceae): Implications for speciation and collection of herbarium specimens. J. Phycol. 41, 1110–1119 (2005).Article 

    Google Scholar 
    Martins, N. et al. Hybrid vigour for thermal tolerance in hybrids between the allopatric kelps Laminaria digitata and L. pallida (Laminariales, Phaeophyceae) with contrasting thermal affinities. Eur. J. Phys. 54(4), 548–561 (2019).CAS 

    Google Scholar  More

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    Metamorphic aerial robot capable of mid-air shape morphing for rapid perching

    Akçakaya, H. R. et al. Quantifying species recovery and conservation success to develop an IUCN Green List of Species. Conserv. Biol. 32, 1128–1138. https://doi.org/10.1111/cobi.13112 (2018).Article 

    Google Scholar 
    IUCN. The IUCN Red List of Threatened Species. Version 2021-3 (2022).Zellweger, F., De Frenne, P., Lenoir, J., Rocchini, D. & Coomes, D. Advances in microclimate ecology arising from remote sensing. Trends Ecol. Evol. 34, 327–341. https://doi.org/10.1016/j.tree.2018.12.012 (2019).Article 

    Google Scholar 
    Mohan, M. et al. Individual tree detection from unmanned aerial vehicle (UAV) derived canopy height model in an open canopy mixed conifer forest. Forestshttps://doi.org/10.3390/f8090340 (2017).Article 

    Google Scholar 
    Dronova, I., Kislik, C., Dinh, Z. & Kelly, M. A review of unoccupied aerial vehicle use in wetland applications: Emerging opportunities in approach, technology, and data. Droneshttps://doi.org/10.3390/drones5020045 (2021).Article 

    Google Scholar 
    Farinha, A. & Lima, P. U. A novel underactuated hand suitable for human-oriented domestic environments. In: Proceedings – 2016 International Conference on Autonomous Robot Systems and Competitions, ICARSC 2016 106–111, https://doi.org/10.1109/ICARSC.2016.21 (2016).Hamaza, S., Georgilas, I., Heredia, G., Ollero, A. & Richardson, T. Design, modeling, and control of an aerial manipulator for placement and retrieval of sensors in the environment. J. Field Robotics 37, 1224–1245. https://doi.org/10.1002/rob.21963 (2020).Article 

    Google Scholar 
    Nakamura, A. et al. Forests and their canopies: Achievements and horizons in canopy science. Trends Ecol. Evol. 32, 438–451. https://doi.org/10.1016/j.tree.2017.02.020 (2017).Article 

    Google Scholar 
    Hang, K. et al. Perching and resting – A paradigm for UAV maneuvering with modularized landing gears. Sci. Roboticshttps://doi.org/10.1126/scirobotics.aau6637 (2019).Article 

    Google Scholar 
    Danko, T. W., Kellas, A. & Oh, P. Y. Robotic rotorcraft and perch-and-stare: Sensing landing zones and handling obscurants. In ICAR ’05. Proceedings., 12th International Conference on Advanced Robotics, 2005 296–302, https://doi.org/10.1109/ICAR.2005.1507427 (2005).Pauli, J. N., Zachariah Peery, M., Fountain, E. D. & Karasov, W. H. Arboreal folivores limit their energetic output, all the way to slothfulness. Am. Nat. 188, 196–204, https://doi.org/10.1086/687032 (2016).Olson, R. A., Glenn, Z. D., Cliffe, R. N. & Butcher, M. T. Architectural properties of sloth forelimb muscles (Pilosa: Bradypodidae). J. Mamm. Evol. 25, 573–588. https://doi.org/10.1007/s10914-017-9411-z (2018).Article 

    Google Scholar 
    Kovač, M., Germann, J., Hürzeler, C., Siegwart, R. Y. & Floreano, D. A perching mechanism for micro aerial vehicles. J. Micro-Nano Mechatron. 5, 77–91. https://doi.org/10.1007/s12213-010-0026-1 (2009).Article 

    Google Scholar 
    Toon, J. ’SlothBot in the Garden’ Demonstrates Hyper-Efficient Conservation Robot.Thomas, J. et al. Aggressive flight with quadrotors for perching on inclined surfaces. J. Mech. Robot. 8, 51007. https://doi.org/10.1115/1.4032250 (2016).Article 

    Google Scholar 
    Daler, L., Klaptocz, A., Briod, A., Sitti, M. & Floreano, D. A perching mechanism for flying robots using a fibre-based adhesive. In 2013 IEEE International Conference on Robotics and Automation, 4433–4438 (IEEE, 2013).Kovač, M., Germann, J., Hürzeler, C., Siegwart, R. Y. & Floreano, D. A perching mechanism for micro aerial vehicles. J. Micro-Nano Mechatron. 5, 77–91 (2009).Article 

    Google Scholar 
    Pope, M. T. et al. A multimodal robot for perching and climbing on vertical outdoor surfaces. IEEE Trans. Rob. 33, 38–48. https://doi.org/10.1109/TRO.2016.2623346 (2017).Article 

    Google Scholar 
    Lussier Desbiens, A., Asbeck, A. T. & Cutkosky, M. R. Landing, perching and taking off from vertical surfaces. Int. J. Robotics Res. 30, 355–370 (2011).Article 

    Google Scholar 
    Nguyen, H.-N., Siddall, R., Stephens, B., Navarro-Rubio, A. & Kovač, M. A Passively adaptive microspine grapple for robust, controllable perching. In 2019 2nd IEEE International Conference on Soft Robotics (RoboSoft), 80–87 (IEEE, 2019).Braithwaite, A., Al Hinai, T., Haas-Heger, M., McFarlane, E. & Kovač, M. Tensile web construction and perching with nano aerial vehicles. In Robotics Research (eds Bicchi, A. & Burgard, W.) (Springer, Cham, 2018).
    Google Scholar 
    Zhang, K., Chermprayong, P., Alhinai, T. M., Siddall, R. & Kovac, M. SpiderMAV: Perching and stabilizing micro aerial vehicles with bio-inspired tensile anchoring systems. In International Conference on Intelligent Robots and Systems (2017).Roderick, W. R. T., Jiang, H., Wang, S., Lentink, D. & Cutkosky, M. R. Bioinspired grippers for natural curved surface perching. In Conference on Biomimetic and Biohybrid Systems, 604–610 (Springer, 2017).Thomas, J., Loianno, G., Daniilidis, K. & Kumar, V. Visual servoing of quadrotors for perching by hanging from cylindrical objects. IEEE Robotics Automation Lett.https://doi.org/10.1109/LRA.2015.2506001 (2016).Article 

    Google Scholar 
    McLaren, A., Fitzgerald, Z., Gao, G. & Liarokapis, M. A passive closing, tendon driven, adaptive robot hand for ultra-fast, aerial grasping and perching. In IEEE International Conference on Intelligent Robots and Systems 5602–5607, https://doi.org/10.1109/IROS40897.2019.8968076 (2019).Zhang, Z., Xie, P. & Ma, O. Bio-inspired trajectory generation for UAV perching. In 2013 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, 997–1002 (IEEE, 2013).Doyle, C. E. et al. An avian-inspired passive mechanism for quadrotor perching. IEEE/ASME Trans. Mechatron. 18, 506–517. https://doi.org/10.1109/TMECH.2012.2211081 (2013).Article 

    Google Scholar 
    Erbil, M. A., Prior, S. D. & Keane, A. J. Design optimisation of a reconfigurable perching element for vertical take-off and landing unmanned aerial vehicles. Int. J. Micro Air Veh. 5, 207–228 (2013).Article 

    Google Scholar 
    Chi, W., Low, K. H., Hoon, K. H. & Tang, J. An optimized perching mechanism for autonomous perching with a quadrotor. In IEEE International Conference on Robotics and Automation, 3109–3115, (2014). https://doi.org/10.1109/ICRA.2014.6907306Roderick, W. R. T., Cutkosky, M. R. & Lentink, D. Bird-inspired dynamic grasping and perching in arboreal environments. Sci. Roboticshttps://doi.org/10.1126/scirobotics.abj7562 (2021).Article 

    Google Scholar 
    Garcia-Rubiales, F. J., Ramon-Soria, P., Arrue, B. C., Ollero, A. Magnetic & detaching system for Modular UAVs with perching capabilities in industrial environments.,. International Workshop on Research. Education and Development on Unmanned Aerial Systems, RED-UAS2019(172–176), 2019. https://doi.org/10.1109/REDUAS47371.2019.8999704 (2019).Bai, L. et al. Design and experiment of a deformable bird-inspired UAV perching mechanism. J. Bionic Eng. 18, 1304–1316. https://doi.org/10.1007/s42235-021-00098-5 (2021).Article 

    Google Scholar 
    Joachimczak, M., Suzuki, R. & Arita, T. Artificial metamorphosis: Evolutionary design of transforming, soft-bodied robots. Artif. Life 22(271–298), 2016. https://doi.org/10.1162/artl_a_00207 (2016).Article 

    Google Scholar 
    Sims, K. Evolving Virtual Creatures. In Proceedings of the 21st Annual Conference on Computer Graphics and Interactive Techniques, SIGGRAPH ’94, 15-22, https://doi.org/10.1145/192161.192167 (Association for Computing Machinery, 1994).Bongard, J. Morphological change in machines accelerates the evolution of robust behavior. Proc. Natl. Acad. Sci. 108, 1234–1239. https://doi.org/10.1073/pnas.1015390108 (2011).Article 
    ADS 

    Google Scholar 
    Truman, J. W. & Riddiford, L. M. The origins of insect metamorphosis. Nature 401, 447–452. https://doi.org/10.1038/46737 (1999).Article 
    ADS 
    CAS 

    Google Scholar 
    Campbell, N. A. et al. Biology: A Global Approach (Pearson New Your, NY, 2018).
    Google Scholar 
    Dai, J. S. & Rees Jones, J. Mobility in metamorphic mechanisms of foldable/erectable kinds. J. Mech. Des. 121, 375. https://doi.org/10.1115/1.2829470 (1999).Article 

    Google Scholar 
    Mintchev, S. & Floreano, D. Adaptive morphology: A design principle for multimodal and multifunctional robots. IEEE Robot. Autom. Mag. 23, 42–54 (2016).Article 

    Google Scholar 
    Shah, D. et al. Shape changing robots: Bioinspiration, simulation, and physical realization. Adv. Mater. 33, 2002882 (2021).Article 
    CAS 

    Google Scholar 
    Sareh, S., Siddall, R., Alhinai, T. & Kovac, M. Bio-inspired soft aerial robots: Adaptive morphology for high-performance flight. In Soft Robotics: Trends, Applications and Challenges, 65–74 (Springer, 2017).Derrouaoui, S. H., Bouzid, Y., Guiatni, M. & Dib, I. A comprehensive review on reconfigurable drones: classification characteristics design and control technologies. Unmanned Syst. 10(01), 3–29. https://doi.org/10.1142/S2301385022300013 (2022).Floreano, D. & Wood, R. J. Science, technology and the future of small autonomous drones. Nature 521, 460–466 (2015).Article 
    ADS 
    CAS 

    Google Scholar 
    Hwang, D., Barron, E. J., Haque, A. B. & Bartlett, M. D. Shape morphing mechanical metamaterials through reversible plasticity. Sci. Robotics 7, eabg2171. https://doi.org/10.1126/scirobotics.abg2171 (2022).Article 

    Google Scholar 
    Siddall, R., Ortega Ancel, A. & Kovač, M. Wind and water tunnel testing of a morphing aquatic micro air vehicle. Interface focus 7, 20160085. https://doi.org/10.1098/rsfs.2016.0085 (2017).Article 

    Google Scholar 
    Chen, Y. et al. A biologically inspired, flapping-wing, hybrid aerial-aquatic microrobot. Sci. Roboticshttps://doi.org/10.1126/scirobotics.aao5619 (2017).Article 

    Google Scholar 
    Daler, L., Mintchev, S., Stefanini, C. & Floreano, D. A bioinspired multi-modal flying and walking robot. Bioinspiration Biomim.https://doi.org/10.1088/1748-3190/10/1/016005 (2015).Article 

    Google Scholar 
    Kovač, M., Wassim-Hraiz, Fauria, O., Zufferey, J. C. & Floreano, D. The EPFL jumpglider: A hybrid jumping and gliding robot with rigid or folding wings. In 2011 IEEE International Conference on Robotics and Biomimetics, ROBIO 2011 1503–1508, https://doi.org/10.1109/ROBIO.2011.6181502 (2011).Riviere, V., Manecy, A. & Viollet, S. Agile robotic fliers: A morphing-based approach. Soft Roboticshttps://doi.org/10.1089/soro.2017.0120 (2018).Article 

    Google Scholar 
    Bucki, N. & Mueller, M. W. Design and control of a passively morphing quadcopter. In IEEE International Conference on Robotics and Automation, vol. 2019-May, 9116–9122, https://doi.org/10.1109/ICRA.2019.8794373 (2019).Mintchev, S., Daler, L., Eplattenier, G. L., Floreano, D. & Member, S. Foldable and self – deployable pocket sized quadrotor. In Proc. of the IEEE Conference on Robotics and Automation 2190–2195 (2015).Mintchev, S., Shintake, J. & Floreano, D. Bioinspired dual-stiffness origami. Sci. Robotics 0275, 1–8. https://doi.org/10.1126/scirobotics.aau0275 (2018).Article 

    Google Scholar 
    Zhao, M., Kawasaki, K., Anzai, T., Chen, X. & Noda, S. Transformable multirotor with two-dimensional multilinks : Modeling, control, and whole-body aerial manipulation. Int. J. Robot. Res.https://doi.org/10.1177/0278364918801639 (2018).Article 

    Google Scholar 
    Bucki, N., Tang, J. & Mueller, M. W. Design and control of a midair-reconfigurable quadcopter using unactuated hinges. IEEE Trans. Rob.https://doi.org/10.1109/TRO.2022.3193792 (2022).Article 

    Google Scholar 
    Shimoyama, I., Miura, H., Suzuki, K. & Ezura, Y. Insect-like microrobots with external skeletons. IEEE Control Syst. Mag. 13, 37–41. https://doi.org/10.1109/37.184791 (1993).Article 

    Google Scholar 
    Noh, M., Kim, S.-W., An, S., Koh, J.-S. & Cho, K.-J. Flea-inspired catapult mechanism for miniature jumping robots. IEEE Trans. Rob. 28, 1007–1018. https://doi.org/10.1109/tro.2012.2198510 (2012).Article 
    ADS 

    Google Scholar 
    Miyashita, S., Guitron, S., Ludersdorfer, M., Sung, C. R. & Rus, D. An untethered miniature origami robot that self-folds, walks, swims, and degrades. In Proceedings – IEEE International Conference on Robotics and Automation 2015-June, 1490–1496, https://doi.org/10.1109/ICRA.2015.7139386 (2015).Morgan, J., Magleby, S. P. & Howell, L. L. An approach to designing origami-adapted aerospace mechanisms. J. Mech. Des.https://doi.org/10.1115/1.4032973 (2016).Article 

    Google Scholar 
    Liang, X. et al. The AmphiHex: A novel amphibious robot with transformable leg-flipper composite propulsion mechanism. In IEEE International Conference on Intelligent Robots and Systems 3667–3672, https://doi.org/10.1109/IROS.2012.6386238 (2012).Polygerinos, P. et al. Soft robotics: Review of fluid-driven intrinsically soft devices; manufacturing, sensing, control, and applications in human-robot interaction. Adv. Eng. Mater.https://doi.org/10.1002/adem.201700016 (2017).Article 

    Google Scholar 
    Coyle, S., Majidi, C., LeDuc, P. & Hsia, K. J. Bio-inspired soft robotics: Material selection, actuation, and design. Extreme Mech. Lett. 22, 51–59. https://doi.org/10.1016/j.eml.2018.05.003 (2018).Article 

    Google Scholar 
    Rus, D. & Tolley, M. T. Design, fabrication and control of soft robots. Nature 521, 467–475. https://doi.org/10.1038/nature14543 (2015).Article 
    ADS 
    CAS 

    Google Scholar 
    Laschi, C., Mazzolai, B. & Cianchetti, M. Soft robotics: Technologies and systems pushing the boundaries of robot abilities. Sci. Robotics 1, eaah3690. https://doi.org/10.1126/scirobotics.aah3690 (2016).Article 

    Google Scholar 
    Boyraz, P., Runge, G. & Raatz, A. An overview of novel actuators for soft robotics. High Throughput 7, 1–21. https://doi.org/10.3390/act7030048 (2018).Article 

    Google Scholar 
    Miriyev, A., Stack, K. & Lipson, H. Soft material for soft actuators. Nat. Commun. 8, 1–8. https://doi.org/10.1038/s41467-017-00685-3 (2017).Article 
    CAS 

    Google Scholar 
    Nguyen, P. H. & Kovač, M. Adopting physical artificial intelligence in soft aerial robots. IOP Conf. Ser.: Mater. Sci. Eng. 1261, 012006. https://doi.org/10.1088/1757-899X/1261/1/012006 (2022).Article 

    Google Scholar 
    Kim, S.-J., Lee, D.-Y., Jung, G.-P. & Cho, K.-J. An origami-inspired, self-locking robotic arm that can be folded flat. Sci. Robotics 3, eaar2915. https://doi.org/10.1126/scirobotics.aar2915 (2018).Article 

    Google Scholar 
    Ruiz, F., Arrue, B. C. & Ollero, A. SOPHIE: Soft and flexible aerial vehicle for physical interaction with the environment. IEEE Robotics Automation Lett. 7, 11086–11093. https://doi.org/10.1109/LRA.2022.3196768 (2022).Article 

    Google Scholar 
    Doshi, N. et al. Model driven design for flexure-based microrobots. In IEEE International Conference on Intelligent Robots and Systems 2015-Decem, 4119–4126, https://doi.org/10.1109/IROS.2015.7353959 (2015).Koh, J.-S., Doshi, N., Wood, R. J., Temel, F. Z. & McClintock, H. The milliDelta: A high-bandwidth, high-precision, millimeter-scale Delta robot. Sci. Robotics 3, eaar3018. https://doi.org/10.1126/scirobotics.aar3018 (2018).Article 

    Google Scholar 
    Backus, S. B., Sustaita, D., Odhner, L. U. & Dollar, A. M. Mechanical analysis of avian feet: Multiarticular muscles in grasping and perching. R. Soc. Open Sci.https://doi.org/10.1098/rsos.140350 (2015).Article 

    Google Scholar 
    Paine, C. E. T. et al. Functional explanations for variation in bark thickness in tropical rain forest trees. Funct. Ecol. 24, 1202–1210. https://doi.org/10.1111/j.1365-2435.2010.01736.x (2010).Article 

    Google Scholar 
    Miriyev, A. & Kovač, M. Skills for physical artificial intelligence. Nat. Mach. Intell. 2, 658–660. https://doi.org/10.1038/s42256-020-00258-y (2020).Article 

    Google Scholar 
    Felton, S., Tolley, M., Demaine, E., Rus, D. & Wood, R. A method for building self-folding machines. Science 345, 644–646. https://doi.org/10.1126/science.1252610 (2014).Article 
    ADS 
    CAS 

    Google Scholar 
    Siddall, R., Byrnes, G., Full, R. J. & Jusufi, A. Tails stabilize landing of gliding geckos crashing head-first into tree trunks. Commun. Biol. 4, 1–12. https://doi.org/10.1038/s42003-021-02378-6 (2021).Article 
    CAS 

    Google Scholar 
    Feduccia, A. Evidence from claw geometry indicating arboreal habits of Archaeopteryx. Science 259, 790–793. https://doi.org/10.1126/science.259.5096.790 (1993).Article 
    ADS 
    CAS 

    Google Scholar  More