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Yield definitionsYield potential (Yp; megagrams per harvested hectare) is defined as the yield of a cultivar in an environment to which it is adapted, when grown with sufficient water and nutrients in the absence of abiotic and biotic stress40. In irrigated fields, Yp is determined by solar radiation, temperature, atmospheric CO2 concentration and management practices that influence crop cycle duration and light interception, such as sowing date, cultivar maturity and plant density. In rainfed systems where water supply from stored soil water at sowing and in-season precipitation is not enough to meet crop water requirements, water-limited Yp (Yw) is determined by water supply amount and its distribution during the growing season, as well as by soil properties influencing the crop–water balance, such as the rootable soil depth, texture and terrain slope. Actual yield is defined as the average grain yield (megagrams per harvested hectare) obtained by farmers for a given crop with a given water regime. The difference between Yp (or Yw) and farmer actual yield is known as the yield gap11. In the case of irrigated crops, Yp is the proper benchmark to estimate yield gaps, while Yw is the meaningful benchmark for rainfed crops. With good, cost-effective crop management, reaching 70–80% of Yp (or Yw) is a reasonable target for farmers with good access to markets, inputs and extension services, which is usually referred to as ‘attainable yield’41,42. Beyond this yield level, the small return to extra input requirement and labour does not justify the associated financial and environmental costs and level of sophistication in crop and soil management practices.Sources of Yp data derived from top-down and bottom-up approachesWe retrieved data generated from two initiatives following a top-down approach: (1) the GAEZ (http://www.fao.org/nr/gaez/en/; refs. 18,19) and (2) the AgMIP (https://agmip.org/data-and-tools-updated/; refs. 20,21). As the bottom-up approach, we used results from the GYGA (www.yieldgap.org; refs. 11,31,43). The main features of these databases are summarized elsewhere (Supplementary Table 1 and Supplementary Section 1). In the process of selecting the specific dataset, we explicitly attempted to reduce biases in the comparisons to the extent this was possible. For example, in all cases, we used simulations that meet the yield definitions provided in the previous section. We also tried to be consistent in terms of the time period for which Yp (or Yw) was simulated; however, this was not always possible, because while GAEZ and AgMIP use weather datasets that cover the time period between 1961 and 1990 and between 1980 and 2010, respectively, GYGA uses more recent weather data (Supplementary Table 1). Similarly, comparisons between databases were limited to those regions for which there were estimates of Yp (or Yw) for each of the top-down and bottom-up approaches. More detailed information about the three approaches can be found in Supplementary Section 1. We acknowledge that, when assessing different approaches, it is conceivable that there would be an inherent bias depending on who performs it and his/her preference. Although the authors of this current study have all contributed to the development of GYGA, we have maintained neutrality when conducting the analysis and made inferences solely based on the results shown here, avoiding any inherent bias. Additionally, methods and data sources are fully documented and publicly accessible for other researchers who may be interested in replicating our comparison.Comparison of bottom-up and top-down approaches at different spatial levelsComparison of the three databases needs to account for the different spatial resolution at which the data are reported (grid in GAEZ and AgMIP versus buffer in GYGA). In the present study, we compared Yp (or Yw) among the three databases at three spatial levels: local (also referred to as buffer), climate zone (CZ) and country (or subcontinent). An example of the three spatial levels evaluated in this study as well as the Yw estimated by each of the three databases for rainfed maize is shown in Extended Data Fig. 4. We note that buffer is the lowest spatial level at which Yp and Yw are reported in GYGA. For a country such as the United States, where maize production is concentrated on flat geographic areas, the average size of buffers and CZs selected by GYGA is 17,000 and 60,000 km2, respectively; the size is smaller for countries with greater terrain and climate heterogeneity, such as Ethiopia, where the average size of buffers and CZs selected for maize by GYGA is a respective 4,000 and 21,000 km2, or for smaller countries, such as in Europe.The GYGA already provides estimates of Yp (or Yw) and yield gaps at those three spatial levels. Following a bottom-up approach, GYGA estimates the Yp (or Yw) at the buffer level based on the Yp (or Yw) simulated for each crop cycle and soil type (within a given buffer) and their associated harvested area (within that same buffer) using a weighted average. Subsequently, Yp (or Yw) at buffer levels are upscaled to CZ, national or subcontinental levels using a weighted average based on harvested area retrieved from the Spatial Production Allocation Model (SPAM) 201044. Details on the GYGA upscaling method can be found in van Bussel et al.13 In the case of top-down approaches, for comparison purposes, it was necessary to aggregate Yp (or Yw) reported for each individual grid into buffers, CZs and countries in order to make them comparable to those reported by GYGA. To do so, Yp (or Yw) from GAEZ and AgMIP was scaled up to buffer, climate zone and country (or subnational levels) considering the crop-specific area within each pixel, as reported by SPAM 201044. For example, for a given buffer, the average Yp (or Yw) was estimated using a weighted average, in which the value of Yp (or Yw) reported for each of the GAEZ or AgMIP grids located within the GYGA buffer was ‘weighted’ according to the SPAM crop-specific area within that grid. The same approach was used to estimate average Yp (or Yw) at the CZ and country (or subcontinental) levels for GAEZ and AgMIP.For a given buffer, CZ or country (or subcontinent), the yield gap was calculated as the difference between Yp (or Yw) and the average farmer yield (actual yield, Ya). The Yp and Yw were taken as the appropriate benchmarks to estimate yield gaps for irrigated and rainfed crops, respectively. To avoid biases due to the source of average actual yield in the estimation of yield gap, we used the average actual yield dataset from GYGA, because it provides estimates of average actual yield disaggregated by water regime for the most recent time period. Actual yield data from GYGA were retrieved from official statistics available at subnational administrative units such as municipalities, counties, departments and subdistrict. The exact number of years of data to calculate average yield is determined by GYGA on a case-by-case basis, following the principle of including as many recent years of data as possible to account for weather variability while avoiding the bias due to a technological time trend and long-term climate change31. Using the GYGA database on average actual yield for estimation of yield gaps does not bias the results from our study, as GYGA favours the use of official sources of average yields at the finer available spatial resolution, which is the same source of actual yield data used by other databases such as FAO and SPAM22,44. In this study, we opted not to use actual yield data from GAEZ, because they derived from FAOSTAT statistics of the years 2000 and 2005, and thus, they could lead to an overestimation of the yield gap in those regions where actual yields have increased over the past two decades19. Finally, extra production potential was calculated based on the yield gap estimated by each approach and the SPAM crop-specific harvested area reported for each buffer, CZ and country (or subcontinent). The top-down and bottom-up approaches were compared in a total of 67 countries, which together account for 74%, 67% and 43% of global maize, rice and wheat harvested areas, respectively (Extended Data Fig. 2). Overall, our comparison included a total of 1,362 buffers located within 870 CZs, with 422 buffers (within 249 CZs) for rainfed maize, 160 buffers (116 CZs) for irrigated maize, 93 buffers (66 CZs) for rainfed rice, 209 buffers (114 CZs) for irrigated rice, 400 buffers (274 CZs) for rainfed wheat and 78 buffers (49 CZs) for irrigated wheat. In all cases, Yp (or Yw), yield gaps and extra production potential were expressed at standard commercial moisture content (that is, 15.5% for maize, 14% for rice and 13.5% for wheat).We assessed the agreement in Yp (or Yw), yield gap, and extra production potential between GYGA and the two databases that follow a top-down approach (GAEZ and AgMIP) separately for each of the spatial levels (buffer, CZ, country or subcontinent) by calculating root-mean-square error (RMSE) and absolute mean error (ME):$${mathrm{RMSE}} = sqrt {frac{{{sum} {(Y_{{mathrm{TD}}} – Y_{{mathrm{BU}}})^2} }}{n}}$$
(1)
$${mathrm{ME}} = frac{{{sum} {left( {Y_{{mathrm{TD}}} – Y_{{mathrm{BU}}}} right)} }}{n}$$
(2)
where YTD and YBU are the estimated Yp (or Yw), yield gap, or extra production potential for database i following a top-down approach and for GYGA, respectively, and n is the number of paired YTD versus YBU comparisons at a given spatial scale for a given crop in a given country. Separate comparisons were performed for irrigated and rainfed crops.Impact of Yp estimates on food self-sufficiency analysisWe assessed the impact of discrepancies in Yp (or Yw) between top-down and bottom-up approaches on the SSR, which is an important indicator for food security. To do so, we focused on cereal crops in sub-Saharan Africa, and we calculated the SSR for the five main cereal crops in this region (that is, maize, millet, rice, sorghum and wheat) following van Ittersum et al.23. Millet and sorghum were included in the analysis of SSR in sub-Saharan Africa, because together they account for ca. 25% of the total cereal production and ca. 40% of the total cereal harvested area in this region (average over the 2015–2019 period)22. Briefly, we computed current national demand (assumed equal to the 2015 consumption) and the 2015 production of the five cereals to estimate the baseline SSR (that is, in 2015) in ten countries for which Yw (or Yp) data were available in GYGA. Current total cereal demand per country were calculated as the product of current population size derived from United Nations population prospects and cereal demand per capita based on the International Model for Policy Analysis of Agricultural Commodities and Trade (IMPACT)35,45. The annual per-capita demand for the five cereals was expressed in maize yield equivalents by using the crop-specific grain caloric contents, with caloric contents based on FAO food balances46. Current domestic grain production per cereal crop per country (approximately 2015) was calculated as mean actual crop yield (2003–2012) as estimated in GYGA times the 2015 harvested area per crop by FAO22. Total future annual cereal demand per capita (2050), for each of the five cereals and each country, was retrieved from IMPACT modelling results35 using the shared socioeconomic pathway (SSP2, no climate change) from the Intergovernmental Panel on Climate Change fifth assessment47. Total cereal demand per country in 2050 was calculated based on projected 2050 population (medium-fertility variant of United Nations population prospects; https://population.un.org/wpp/) multiplied by the per-capita cereal demand in 2050 from the SSP2 scenario. In our study, we assumed an attainable yield of 80% of Yw for rainfed crops, which is consistent with the original approach followed by van Ittersum et al.23, but, in our study, we also used 80% of Yp for irrigated crops as an estimate of the attainable yield, instead of 85% as in van Ittersum et al.23, to be slightly more conservative. Because the goal was to understand the level of SSR on existing cropland, we assumed no expansion of rainfed or irrigated cropland and no change in net planted area for each of the cereal crops. Our calculations for sub-Saharan Africa may be too pessimistic if genetic progress to increase Yp is achieved. Historically, genetic progress in Yp has contributed to progress in farm yields, although the magnitude of Yp increase is debatable. Progress in elevating Yp of the major cereals would imply, however, that even larger yield gaps need to be overcome than the already large gaps reported herein. Hence, we did not account for changes in genetic Yp in our calculation of SSR by 2050, also because climate change is likely to have a negative effect on Yp and Yw in sub-Saharan Africa.Reporting SummaryFurther information on research design is available in the Nature Research Reporting Summary linked to this article. More

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Targeted amplicon sequencing (TAS) or targeted analysis sequencing is a method which addresses the sequencing of specific amplicons and genes. The approach is technologically rooted in next-generation sequencing (NGS), also called high-throughput sequencing (HTS) or massively parallel sequencing and offers the possibility to read millions of sequences in one sequencing run. The rapid evolution of NGS technology with constant increases in sample numbers, data output per sequencing run and associated decreases in costs, has led to this approach becoming widely used in various areas of research. With epigenome, genome and transcriptome sequencing, NGS extends over a wide field, regardless of the different biological disciplines (e.g., botany, ecology, evolutionary biology, genetics, medical sciences, microbiology, zoology, etc.)1,2,3,4,5,6,7,8. In addition to the use of NGS runs in studies to research gene regulation and expression, the characterization of mRNA during transcriptome analyses, the development of molecular markers and genome assembly, another possible application in the context of TAS is the investigation of genetic variation. There is a large range of possible TAS applications including variant detection and tumour profiling in cancer research, the detection of somatic mutations or those associated with susceptibility to disease, new findings in the field of phylogeny and taxonomy studies or the discovery of useful genes for applications in molecular breeding2,3,9,10. In the field of environmental sciences, TAS is becoming increasingly important, as it facilitates the assessment of the taxonomic composition of environmental samples with the help of metabarcoding approaches such as environmental DNA (eDNA) based biomonitoring or food web studies11,12,13.Although NGS-based TAS is a powerful approach, different errors and biases can be introduced in such data sets. Sequencing errors have already been documented in medical studies, wherein factors such as sample handling, polymerase errors and PCR enrichment steps were identified as potential biases14,15. Similarly, other factors such as the variation in sequencing depth between individual samples, sequencing errors rates and index hopping can also play an important role within the analysis of NGS data. The difficulty is that there are currently no general standards requiring detailed reports and explanations to correct such potential errors, and very few studies have addressed this issue. Moreover, there is ever increasing access to NGS platforms, provided by sequencing companies, core facilities and research institutes16,17. NGS services often only provide the sequencing data while general information on the particular NGS run, demultiplexing-efficiency of individual samples and other relevant parameters are usually not passed on. The lack of such information and of a precise description of bioinformatic data processing makes it difficult to assess how the respective NGS run and the subsequent data processing went, which in turn complicates the comparison of results from different studies. Here, we show that specific aspects of library and data preparation have a critical influence on the assignment of sequencing results and how these problems can be addressed using a carabid beetle trophic data set as a case study system.Currently, a widely used approach to study large sample numbers is the analysis of pooled samples, by combining DNA from multiple individuals into one sample of the NGS library, thereby excluding the opportunity of backtracking specific sequences to an individual sample (no individual tagging)18,19,20. In ecological studies (e.g., in biodiversity research and functional ecology), the analysis of such pooled samples may then lead to a decreased estimate of the diversity of the identified species compared to an individual-based analysis21. Aside from the potential loss of information, pooled samples make it impossible to assign a given sample to its specific collection site and thus, the ability to refer to habitat related differences. For individual-level analyses, the ‘nested metabarcoding approach’22 offers a promising solution to problems of complexity and cost. It is both a cost-efficient NGS protocol and one that is scalable to hundreds of individual samples, making it ideal for any study that relies on high sample numbers or that analyses samples which need to be tagged individually, such as in the medical field for patient samples. Using the nested metabarcoding approach, each sample is tagged with four indexes defining a sample. The presence of sequencing errors within the index region can complicate the demultiplexing process and thus the identification of the sample affiliation of individual reads. For a precise assignment of reads to each sample using the index combinations, sequencing errors must be considered in the analysis in order to be able to assign a maximum number of reads.Besides sequencing errors within the different index regions that renders the read assignment difficult, a well-known, but at the same time often ignored problem is ‘index hopping’. This phenomenon, also called index switching/swapping, describes the index mis-assignment between multiplexed libraries and its rate rises as more free adapters or primers are present in the prepared NGS library23,24. Illumina therefore differentiates between combinatorial dual indexing and unique dual indexing. Special kits are offered with unique dual index sequences (set of 96 primer pairs) to counter the problem of index hopping and pitfalls of demultiplexing. This is an option for low sample numbers, as these can still be combined with unique dual indexes (UDIs). If several hundred samples are to be individually tagged in one run, it can be difficult to implement unique dual indexing due to the high number of samples and for cost reasons. Here, the nested metabarcoding approach offers a convenient solution for analysing a large number of individual samples at comparatively low costs. However, it is important to be careful regarding index hopping since more indexes are used in the nested metabarcoding approach than for pooling approaches. For instance, in silico cross-contamination between samples from different studies and altered or falsified results can occur if a flow cell lane is shared and the reads were incorrectly assigned. Even where samples are run exclusively on a single flow cell, index hopping may result in barcode switching events between samples that lead to mis-assignment of reads.For library preparations of Illumina NGS runs, two indexes are usually used to tag the individual samples (dual indexing)25. Illumina offers the option to do the demultiplexing and convert the sequenced data into FASTQ file formats using the supplied ‘bcl2fastq’ or ‘bcl2fastq2’ conversion software tool26. This demultiplexing is a crucial step, as it is here that the generated DNA sequences are assigned to the samples. In most cases, the data is already provided demultiplexed after the NGS run by the sequencing facility, especially if runs were shared between different studies/sample sets. Researchers starting the bioinformatic analysis with demultiplexed data assume that the assignment of the sequences to samples was correct. Verifying this is extremely difficult because the provided data sets lack all the information on the demultiplexing settings and, above all, on the extent of sequencing errors within indexes and index hopping. As a consequence, sequences can be incorrectly assigned to samples and, in case of a shared flow cell, even across sample sets. These steps of bioinformatic analysis are very often outsourced to companies and details on demultiplexing are seldom reported, showing that the problem of read mis-assignment has received little attention so far. However, it is known that demultiplexing errors occur and depend on various factors such as the Illumina sequencing platform, the library type used and index combinations23,24,25,27,28,29,30. The few existing studies investigating index hopping in more detail give rates of 0.2–10%24,31,32,33,34. This indicates the importance of being able to estimate the extent of index hopping for a specific library. The problem of sequencing errors within indexes and index hopping can become particularly significant if, due to the large number of individual samples, libraries were constructed with two instead of one index pair, such as it is the case in the nested metabarcoding approach35. Then, one is inevitably confronted with the effect of sequencing errors and index hopping on demultiplexing and subsequently on the data output.After each NGS run, the combination of computational power and background knowledge in bioinformatics are needed to ensure time-efficient and successful data analysis36. But even for natural scientists with considerable bioinformatic experience, there is a lack of know-how or even rules-of-thumb in this still nascent field. It is well known that specific decisions have a marked impact on the outcome of a study, with both the sequencing platform and software tools significantly affecting the results and thereby the interpretation of the sequencing information37. Knowledge of the individual data processing steps, such as for the demultiplexing, is also often missing or poorly described. Information on how to minimize data loss within the individual steps for data preparation of the NGS data is also mostly not explained. Given this lack of detail, it is a challenge to understand what was done during sample processing and data analysis, and impossible to compare the outcomes of different studies. To date, published NGS studies, such as TAS or DNA metabarcoding studies, are difficult to compare or evaluate because of the lack of this essential information on data processing. This is particularly important as NGS is increasingly being done by external service providers. As a consequence, there is a pressing need for comprehensive protocols that detail the aspects that need to be considered during analysis.Using a case study on the dietary choice of carabid beetles (Coleoptera: Carabidae) in arable land, we detail a comprehensive protocol that describes an entire workflow targeting ITS2 fragments, using an Illumina HiSeq 2500 system and applying the nested metabarcoding approach22 to identify those species of weed seeds consumed by carabid individuals. We demonstrate a concept that employs bioinformatic tools for targeted amplicon sequencing in a defined order. By analysing the effects of sequencing errors and index hopping on demultiplexing and data trimming, we show the importance of describing the software and pipeline used and its version, as well as specifying software configurations and thresholds settings for each TAS data set to receive a realistic data output per sample. Without this information, there is the possibility of incorrectly assigning samples or not receiving the maximum or at least a sufficient number of sequences which in turn would hamper the results.The concept described below can be used to analyse a large number of samples, here to identify food items on species-specific level, and to address the possible problems that may arise in NGS data processing. We identify problems to overcome and potential solutions by examining: (i) the variation in sequencing depth of individually tagged samples and the effect of library preparation on the data output; (ii) the influence of sequencing errors within index regions and its consequences for demultiplexing; and, (iii) the effect of index hopping. By doing this, we highlight the benefits of a detailed protocol for bioinformatic analysis of a given data set, and the importance of the reporting of bioinformatic parameters, especially for the demultiplexing, and thresholds to be used for meaningful data interpretation. More

Indigenous territories, long a bulwark against deforestation in the Amazon, are under increasing threat in Brazil, according to an analysis of 36 years’ worth of satellite imagery. The data show that illicit mining operations on Indigenous lands and in other areas formally protected by law have hit a record high in the past few years, under the administration of President Jair Bolsonaro, underscoring fears that his policies and rhetoric are undermining both human rights and environmental protection across the world’s largest rainforest. These operations strip the land of vegetation and pollute waterways with mercury.
When will the Amazon hit a tipping point?
The analysis, released in late August, comes as scientists and environmentalists warn of a deteriorating situation in Brazil; Indigenous groups have frequently found themselves in violent clashes with miners since Bolsonaro took office in 2019 — and they are demanding more protection for their land. Although Indigenous territories are legally protected, Bolsonaro has openly called for mining and other development in them.“This is definitely the worst it’s been for Indigenous peoples since the constitution was signed in 1988,” says Glenn Shepard, an anthropologist with the Emílio Goeldi Museum in Belém. Before this, Brazil was ruled by a military dictatorship.Researchers at MapBiomas, a consortium of academic, business and non-governmental organizations that has been conducting geospatial studies across Brazil, developed algorithms that they used in conjunction with Google Earth Engine to conduct the analysis. After training the algorithms on images of mining operations — desolate landscapes where forests have been converted into a collection of sand dunes pockmarked by mining ponds — the team ran its analysis on a freely available archive of imagery captured by the US Landsat programme, and then analysed trends on Indigenous lands and other formally protected areas where mining is not allowed.Over the past decade, illegal mining incursions — mostly small-scale gold extraction operations — have increased fivefold on Indigenous lands and threefold in other protected areas of Brazil such as parks, the data show (see ‘Mining incursions’). The findings agree broadly with reports from Brazil’s National Institute for Space Research (INPE) in São José dos Campos, which monitors the country’s forests and has been issuing alerts about mining incursions for several years. “We kind of knew that this was happening, but to see numbers like this is scary even for us,” says Cesar Diniz, a geologist with the geospatial-analysis company Solved in Belém, Brazil, who led the analysis for MapBiomas.Clashes on multiple frontsAside from being home to their people, Indigenous territories play a part in protecting the Amazon’s biodiversity and the enormous pool of carbon that is locked away in its trees and soils. Numerous studies have found that Indigenous lands, as well as other conservation areas, are effective buffers against tropical deforestation in the Amazon1,2, which is responsible for around 8% of global carbon emissions.Earlier this month, the International Union for Conservation of Nature (IUCN) approved a motion, put forward by Indigenous groups, calling on governments to protect 80% of the Amazon basin by 2025. Indigenous representatives say they plan to fight for implementation across the Amazon, but the proposal faces a particularly tough sell in Brazil under Bolsonaro, whose pro-business conservative government has scaled back enforcement of existing environmental laws and halted efforts to demarcate new Indigenous territories.

Sources: MapBiomas/Amazon Geo-Referenced Socio-Environmental Information Network/Terrabrasilis

Indigenous groups have also taken their case to the International Criminal Court in The Hague, the Netherlands. On 9 August, the Articulation of Indigenous Peoples of Brazil (APIB), which represents Indigenous groups across the country, filed a complaint with the court accusing the Bolsonaro administration of violating human rights and, they claim, paving a path for genocide by undermining Indigenous rights, reducing environmental protections and inciting incursions and violence through calls for mining and land development. APIB also made it clear that it’s not just Indigenous rights at stake, drawing a direct link between the protection of their territories and of the globe.

Members of the Munduruku people sit in front of equipment from an illegal mining operation on their land.Credit: Meridith Kohut/The New York Times/eyevine

“Defending the traditional territories of Amazonian communities is the best way to save the forest,” says Luiz Eloy Terena, an anthropologist and lawyer from the village of Ipegue who coordinates legal affairs for APIB. “What is needed is a state commitment on the demarcation and protection of Indigenous lands, which are the last barrier against deforestation and forest degradation.”During an address to the United Nations General Assembly on 21 September, Bolsonaro said he was committed to protecting the Amazon and emphasized that 600,000 Indigenous people live “in freedom” on reserves totalling 1.1 million square kilometres of land, equivalent to 14% of Brazil’s territory. In the past, Bolsonaro has publicly said that Indigenous peoples have too much land given their sparse population, and at times called for their “integration”. The Bolsonaro administration did not respond to Nature’s requests for comment regarding illegal mining in the Amazon, its Indigenous and environmental policies or the accusations filed with the International Criminal Court.Existential threatBrazil earned recognition as a leader in sustainable development during the 2000s. Former president Luiz Inácio ‘Lula’ da Silva and his Workers’ Party put in place policies that helped to curb deforestation in the Amazon by more than 80% between 2004 and 2012.

Source: Brazilian National Institute for Space Research

But the party was dogged by corruption charges that would later land Lula in jail, and its environmental agenda ultimately faltered. In 2012, the increasingly conservative Brazilian Congress weakened a once-vaunted forest-protection law. With each successive government, funding for the country’s main environmental enforcement agency, the Institute of Environment and Renewable Natural Resources (IBAMA), has decreased: IBAMA had 1,500 enforcement agents in 2012, compared with just 600 today, says Suely Araújo, a political scientist in Brasília who spent nearly three decades working in the Brazilian Congress and led IBAMA from 2016 to 2018.The rate of deforestation in the Amazon, which includes land converted for mining, agriculture and other development, began rising anew after 2012 and shot up by 44% during Bolsonaro’s first two years in office, according to INPE (see ‘Razing the rainforest’). Many expect yet another increase when the numbers for 2021 are released later this year.But the biggest threats are yet to come, says Araújo. The current government is now pushing legislation in Congress — as well as arguments in a case that is pending before Brazil’s Supreme Court — that would make it harder to establish new Indigenous lands and could even allow the government to repossess existing lands. Other legislation that has been advanced by Bolsonaro’s supporters in Congress would open up Indigenous lands to industrial development, grant amnesty to people who have illegally invaded public lands and gut regulations governing major infrastructure projects such as mines, roads and dams.
The scientists restoring a gold-mining disaster zone in the Peruvian Amazon
“It’s painful,” says Araújo, who decided to forgo retirement and join Brazil’s Climate Observatory, a coalition of activist and academic groups fighting to preserve the country’s social and environmental protections. “This has become my mission.”For Indigenous tribes, the growing damage to their lands and the rainforest pose an existential threat. More than 6,000 Indigenous people descended on Brasília, the country’s capital, in August and September in protest against Bolsonaro’s policies on land demarcation and the environment. They also travelled to Marseille, France, for the IUCN’s World Conservation Congress earlier this month to promote their motion to protect the Amazon basin.“We will not give up,” says José Gregorio Diaz Mirabal, a member of the Wakueni Kurripaco people of Venezuela and the elected leader of the Congress of Indigenous Organizations of the Amazon Basin. “Science supports us, and the world is waking up.”

doi: https://doi.org/10.1038/d41586-021-02644-x

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The scientists restoring a gold-mining disaster zone in the Peruvian Amazon

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Project manager target identification and validation for Alzheimer’s disease

Flanders Institute for Biotechnology (VIB)
Leuven, Belgium

PhD Positions in the Wisnovsky Lab, UBC Pharmaceutical Sciences

The University of British Columbia (UBC)
Vancouver, Canada

Post-doctoral Fellow – NAD Metabolism in Heart Disease

Oklahoma Medical Research Foundation (OMRF)
Oklahoma City, United States

Research Scientist – High Performance Computing (HPC) / Machine Learning (ML)

Jülich Research Centre (FZJ)
Jülich, Germany More