Ecology

Trivers, R. L. Parent-offspring conflict. Am. Zool. 14, 249–264 (1974).Article 

Google Scholar 
Gittleman, J. L. & Thompson, S. D. Energy allocation in mammalian reproduction. Am. Zool. 28, 863–875 (1988).Article 

Google Scholar 
Kerby, J. & Post, E. Capital and income breeding traits differentiate trophic match-mismatch dynamics in large herbivores. Philos. Trans. R. Soc. B Biol. Sci. 368, 20120484 (2013).Article 

Google Scholar 
Costa, D. P. Reproductive and foraging energetics of pinnipeds: Implications for life history patterns. In The Behaviour of Pinnipeds (ed. D. Renouf) 300–344 (Springer, Netherlands, 1991).Costa, D. P., Boeuf, B. J. L., Huntley, A. C. & Ortiz, C. L. The energetics of lactation in the Northern elephant seal, Mirounga angustirostris. J. Zool. 209, 21–33 (1986).Article 

Google Scholar 
Crocker, D. E., Williams, J. D., Costa, D. P. & Le Boeuf, B. J. Maternal traits and reproductive effort in northern elephant seals. Ecology 82, 3541–3555 (2001).Article 

Google Scholar 
Shero, M. R., Krotz, R. T., Costa, D. P., Avery, J. P. & Burns, J. M. How do overwinter changes in body condition and hormone profiles influence Weddell seal reproductive success? Funct. Ecol. 29, 1278–1291 (2015).Article 

Google Scholar 
Lönnerdal, B. Bioactive proteins in human milk—potential benefits for preterm infants. Clin. Perinatol. 44, 179–191 (2017).PubMed 
Article 

Google Scholar 
Fields, D. A. et al. Associations between human breast milk hormones and adipocytokines and infant growth and body composition in the first 6 months of life. Pediatr. Obes. 12, 78–85 (2017).PubMed 
PubMed Central 
Article 

Google Scholar 
Klein, L. D. et al. Concentrations of trace elements in human milk: comparisons among women in Argentina, Namibia, Poland, and the United States. PLoS ONE 12, e0183367 (2017).PubMed 
PubMed Central 
Article 
CAS 

Google Scholar 
Burns, J. M. & Hammill, M. O. Does iron availability limit oxygen store development in seal pups? In 4th CPB Meeting in Africa: Mara 2008. “Molecules to migration: The pressures of life” International Proceedings 417–428 (Medimond Publishing Co., 2008).Burns, J. M., Lestyk, K., Folkow, L. P., Hammill, M. O. & Blix, A. S. Size and distribution of oxygen stores in harp and hooded seals from birth to maturity. J. Comp. Physiol. B 177, 687–700 (2007).CAS 
PubMed 
Article 

Google Scholar 
Kooyman, G. L. Diverse divers: Physiology and behavior. (Springer-Verlag, 1989).Butler, P. J. & Jones, D. R. Physiology of diving of birds and mammals. Physiol. Rev. 77, 837–899 (1997).CAS 
PubMed 
Article 

Google Scholar 
Kanatous, S. B., DiMichele, L. V., Cowan, D. F. & Davis, R. W. High aerobic capacities in skeletal muscles of pinnipeds: adaptations to diving hypoxia. J. Appl. Physiol. 86, 1247–1256 (1999).CAS 
PubMed 
Article 

Google Scholar 
Shero, M. R., Andrews, R. D., Lestyk, K. C. & Burns, J. M. Development of the aerobic dive limit and muscular efficiency in northern fur seals (Callorhinus ursinus). J. Comp. Physiol. B 182, 425–436 (2012).CAS 
PubMed 
Article 

Google Scholar 
Shero, M. R., Costa, D. P. & Burns, J. M. Scaling matters: Incorporating body composition into Weddell seal seasonal oxygen store comparisons reveals maintenance of aerobic capacities. J. Comp. Physiol. B 185, 811–824 (2015).CAS 
PubMed 
Article 

Google Scholar 
Shero, M. R., Reiser, P. J., Simonitis, L. & Burns, J. M. Links between muscle phenotype and life history: differentiation of myosin heavy chain composition and muscle biochemistry in precocial and altricial pinniped pups. J. Compar. Physiol. B, https://doi.org/10.1007/s00360-019-01240-w (2019).Burns, J. M., Lestyk, K., Freistroffer, D. & Hammill, M. O. Preparing muscles for diving: age-related changes in muscle metabolic profiles in Harp (Pagophilus groenlandicus) and hooded (Cystophora cristata) seals. Physiol. Biochem. Zool. 88, 167–182 (2015).CAS 
PubMed 
Article 

Google Scholar 
Kooyman, G. L., Wahrenbrock, E. A., Castellini, M. A., Davis, R. W. & Sinnett, E. E. Aerobic and anaerobic metabolism during voluntary diving in Weddell seals: evidence of preferred pathways from blood chemistry and behavior. J. Comp. Physiol. 138, 335–346 (1980).CAS 
Article 

Google Scholar 
Wallace, D. F. The regulation of iron absorption and homeostasis. Clin. biochemist. Rev. 37, 51–62 (2016).
Google Scholar 
Juan, S.-H. & Aust, S. D. Studies on the interaction between ferritin and ceruloplasmin. Arch. Biochem. Biophys. 355, 56–62 (1998).CAS 
PubMed 
Article 

Google Scholar 
Hagler, L. et al. Influence of dietary iron deficiency on hemoglobin, myoglobin, their respective reductases, and skeletal muscle mitochondrial respiration. Am. J. Clin. Nutr. 34, 2169–2177 (1981).CAS 
PubMed 
Article 

Google Scholar 
Kooyman, G. L. Weddell seal: Consummate Diver. (Cambridge University Press, 1981).Heerah, K. et al. Ecology of Weddell seals during winter: Influence of environmental parameters on their foraging behaviour. Deep Sea Res. Part II: Topical Stud. Oceanogr. 88–89, 23–33 (2013).ADS 
Article 

Google Scholar 
Hindell, M. A., Harcourt, R., Waas, J. R. & Thompson, D. Fine-scale three-dimensional spatial use by diving, lactating female Weddell seals Leptonychotes weddellii. Mar. Ecol. Prog. Ser. 242, 275–284 (2002).ADS 
Article 

Google Scholar 
Sato, K. et al. Deep foraging dives in relation to the energy depletion of Weddell seal (Leptonychotes weddellii) mothers during lactation. Polar Biol. 25, 696–702 (2002).Article 

Google Scholar 
Wheatley, K. E., Bradshaw, C. J., Davis, L. S., Harcourt, R. G. & Hindell, M. A. Influence of maternal mass and condition on energy transfer in Weddell seals. J. Anim. Ecol. 75, 724–733 (2006).PubMed 
Article 

Google Scholar 
Walcott, S. M. Evaluating the dynamics of physiological, environmental and behavioral parameters to the cost of the annual pelage molt in a polar pinniped: the Weddell seal (Leptonychotes weddellii) MSc thesis, University of Alaska Anchorage, (2019).Beltran, R. S. et al. Seasonal resource pulses and the foraging depth of a Southern Ocean top predator. Proc. R. Soc. B: Biol. Sci. 288, 20202817 (2021).CAS 
Article 

Google Scholar 
Shero, M. R., Goetz, K. T., Costa, D. P. & Burns, J. M. Temporal changes in Weddell seal dive behavior over winter: Are females increasing foraging effort to support gestation? Ecol. Evol. 8, 11857–11874 (2018).PubMed 
PubMed Central 
Article 

Google Scholar 
Looker, A. C. & Johnson, C. L. Prevalence of elevated serum transferrin saturation in adults in the United States. Ann. Intern. Med. 129, 940–945 (1998).CAS 
PubMed 
Article 

Google Scholar 
Eleftheriadis, T., Liakopoulos, V., Antoniadi, G. & Stefanidis, I. Which is the best way for estimating transferrin saturation. Ren. Fail. 32, 1022–1023 (2010).PubMed 
Article 

Google Scholar 
McLaren, C. E. et al. Distribution of transferrin saturation in an Australian population: relevance to the early diagnosis of hemochromatosis. Gastroenterology 114, 543–549 (1998).CAS 
PubMed 
Article 

Google Scholar 
Emmett, B. & Hochachka, P. W. Scaling of oxidative and glycolytic enzymes in mammals. Respir. Physiol. 45, 261–272 (1981).CAS 
PubMed 
Article 

Google Scholar 
Clark, C. A., Burns, J. M., Schreer, J. F. & Hammill, M. O. Erythropoietin concentration in developing harbor seals (Phoca vitulina). Gen. Comp. Endocrinol. 147, 262–267 (2006).CAS 
PubMed 
Article 

Google Scholar 
Richmond, J. P., Burns, J. M., Rea, L. D. & Mashburn, K. L. Postnatal ontogeny of erythropoietin and hematology in free-ranging Steller sea lions (Eumetopias jubatus). Gen. Comp. Endocrinol. 141, 240–247 (2005).CAS 
PubMed 
Article 

Google Scholar 
Hadley, G. L., Rotella, J. J. & Garrott, R. A. Influence of maternal characteristics and oceanographic conditions on survival and recruitment probabilities of Weddell seals. Oikos 116, 601–613 (2006).Article 

Google Scholar 
Hall, A. C., McConnell, B. J. & Barker, R. J. Factors affecting first-year survival in grey seals and their implications for life history strategies. J. Anim. Ecol. 70, 138–149 (2001).
Google Scholar 
Proffitt, K. M., Garrott, R. A. & Rotella, J. J. Long-term evaluation of body mass at weaning and postweaning survival rates of Weddell seals in Erebus Bay, Antarctica. Mar. Mamm. Sci. 24, 677–689 (2008).Article 

Google Scholar 
Burns, J. M. & Castellini, M. A. Physiological and behavioral determinants of the aerobic dive limit in Weddell seal (Leptonychotes weddellii) pups. J. Comp. Physiol. B 166, 473–483 (1996).Article 

Google Scholar 
Costa, D. P., Kuhn, C. E., Weise, M. J., Shaffer, S. A. & Arnould, J. P. Y. When does physiology limit the foraging behaviour of freely diving mammals? Int. Congr. Ser. 1275, 359–366 (2004).Article 

Google Scholar 
Hadley, G. L., Rotella, J. J. & Garrott, R. A. Evaluation of reproductive costs for Weddell seals in Erebus Bay, Antarctica. J. Anim. Ecol. 76, 448–458 (2007).PubMed 
Article 

Google Scholar 
Young, S. P., Fahmy, M. & Golding, S. Ceruloplasmin, transferrin and apotransferrin facilitate iron release from human liver cells. FEBS Lett. 411, 93–96 (1997).CAS 
PubMed 
Article 

Google Scholar 
Mazzaro, L. M., Dunn, J. L., St. Aubin, D. J., Andrews, G. A. & Chavey, P. S. Serum indices of body stores of iron in northern fur seals (Callorhinus ursinus) and their relationship to hemochromatosis. Zoo. Biol. 23, 205–218 (2004).Article 

Google Scholar 
Yalçn, S. S., Baykan, A., Yurdakök, K., Yalçn, S. & Gücüs, A. I. The factors that affect milk-to-serum ratio for iron during early lactation. J. Pediatr. Hematol. Oncol. 31, 85–90 (2009).Article 

Google Scholar 
Geiseler, S. J., Blix, A. S., Burns, J. M. & Folkow, L. P. Rapid postnatal development of myoglobin from large liver iron stores in hooded seals. J. Exp. Biol. 216, 1793–1798 (2013).CAS 
PubMed 

Google Scholar 
Samokyszyn, V. M., Miller, D. M., Reif, D. W. & Aust, S. D. Inhibition of superoxide and ferritin-dependent lipid peroxidation by ceruloplasmin. J. Biol. Chem. 264, 21–26 (1989).CAS 
PubMed 
Article 

Google Scholar 
Kohgo, Y., Ikuta, K., Ohtake, T., Torimoto, Y. & Kato, J. Body iron metabolism and pathophysiology of iron overload. Int. J. Hematol. 88, 7–15 (2008).CAS 
PubMed 
PubMed Central 
Article 

Google Scholar 
Zhang, P. et al. The effect of serum iron concentration on iron secretion into mouse milk. J. Physiol. 522(Pt 3), 479–491 (2000).CAS 
PubMed 
PubMed Central 
Article 

Google Scholar 
Erdogan, S., Celik, S. & Erdogan, Z. Seasonal and locational effects on serum, milk, liver and kidney chromium, manganese, copper, zinc, and iron concentrations of dairy cows. Biol. Trace Elem. Res. 98, 51–61 (2004).CAS 
PubMed 
Article 

Google Scholar 
Kaldor, I. & Morgan, E. H. Iron metabolism during lactation and suckling in a marsupial, the quokka (Setonix brachyurus). Comp. Biochem. Physiol. Part A: Physiol. 84, 691–694 (1986).CAS 
Article 

Google Scholar 
Tedman, R. A. & Green, B. Water and sodium fluxes in suckling pups of Weddell seals (Leptonychotes weddelli). J. Zool. 212, 29–42 (1987).Article 

Google Scholar 
National Institutes of Health, Supplements, O. o. D. Iron Fact Sheet for Consumers, https://ods.od.nih.gov/factsheets/Iron-Consumer/ (2021).Saarinen, U. M., Siimes, M. A. & Dallman, P. R. Iron absorption in infants: high bioavailability ofbreast milk iron as indicated by the extrinsic tag method of iron absorption and by the concentration of serum ferritin. J. Pediatrics 91, 36–39 (1977).CAS 
Article 

Google Scholar 
Loh, T.-T. Iron metabolism of the lactating mouse. Proc. Soc. Exp. Biol. Med. 137, 962–965 (1971).CAS 
PubMed 
Article 

Google Scholar 
Folkow, L. P., Nordoy, E. S. & Blix, A. S. Distribution and diving behavior of harp seals (Pagophilus groenlandica) from the Greenland Sea stock. Polar Biol. 27, 281–298 (2004).Article 

Google Scholar 
Beck, C. A., Bowen, W. D. & Iverson, S. J. Seasonal changes in buoyancy and diving behaviour of adult grey seals. J. Exp. Biol. 203, 2323–2330 (2000).CAS 
PubMed 
Article 

Google Scholar 
Gentry, R. L. & Kooyman, G. L. Fur seals: maternal strategies on land and at sea. (Princeton University Press, 1986).McDonald, B. I. & Ponganis, P. J. Insights from venous oxygen profiles: oxygen utilization and management in diving California sea lions. J. Exp. Biol. 216, 3332–3341 (2013).CAS 
PubMed 
Article 

Google Scholar 
Noren, S. R., Iverson, S. J. & Boness, D. J. Development of the blood and muscle oxygen stores in gray seals (Halichoerus grypus): Implications for juvenile diving capacity and the necessity of a terrestrial postweaning fast. Physiol. Biochem. Zool. 78, 482–490 (2005).PubMed 
Article 

Google Scholar 
Weise, M. J. & Costa, D. P. Total body oxygen stores and physiological diving capacity of California sea lions as a function of sex and age. J. Exp. Biol. 210, 278–289 (2007).PubMed 
Article 

Google Scholar 
Burns, J. M., Hindell, M. A., Bradshaw, C. J. A. & Costa, D. P. Fine-scale habitat selection by crabeater seals as determined by diving behavior. Deep Sea Res. II 55, 500–514 (2008).ADS 
Article 

Google Scholar 
Burns, J. Crabeater seal oxygen stores. U.S. Antarctic Program (USAP) Data Center. https://doi.org/10.15784/601583 (2022).Nicol, S. et al. Southern Ocean iron fertilization by baleen whales and Antarctic krill. Fish. Fish. 11, 203–209 (2010).Article 

Google Scholar 
Williams, T. M. The cost of foraging by a marine predator, the Weddell seal Leptonychotes weddellii: pricing by the stroke. J. Exp. Biol. 207, 973–982 (2004).PubMed 
Article 

Google Scholar 
Wheatley, K. E., Bradshaw, C. J. A., Harcourt, R. G. & Hindell, M. A. Feast or famine: evidence for mixed capital–income breeding strategies in Weddell seals. Oecologia 155, 11–20 (2008).ADS 
PubMed 
Article 

Google Scholar 
Honda, K., Sahrul, M., Hidaka, H. & Tatsukawa, R. Organ and tissue distribution of heavy metals, and their growth-related changes in Antarctic Fish, Pagothenia borchgrevinki. Agric. Biol. Chem. 47, 2521–2532 (1983).CAS 

Google Scholar 
Galbraith, E. D., Le Mézo, P., Solanes Hernandez, G., Bianchi, D. & Kroodsma, D. Growth limitation of marine fish by low iron availability in the open ocean. Front. Marine Sci. 6, https://doi.org/10.3389/fmars.2019.00509 (2019).Pollycove, M. & Mortimer, R. The quantitative determination of iron kinetics and hemoglobin synthesis in human subjects. J. Clin. Invest. 40, 753–782 (1961).CAS 
PubMed 
PubMed Central 
Article 

Google Scholar 
Åkeson, Å., Ehrenstein, G. V., Hevesy, G. & Theorell, H. Life span of myoglobin. Arch. Biochem. Biophys. 91, 310–318 (1960).PubMed 
Article 

Google Scholar 
Tift, M. S. et al. Adaptive potential of the heme oxygenase/carbon monoxide pathway during hypoxia. Front. Physiol. 11, https://doi.org/10.3389/fphys.2020.00886 (2020).Tift, M. S., Ponganis, P. J. & Crocker, D. E. Elevated carboxyhemoglobin in a marine mammal, the northern elephant seal. J. Exp. Biol. 217, 1752–1757 (2014).CAS 
PubMed 
PubMed Central 
Article 

Google Scholar 
Ma, Y.-J. et al. A modified carbon monoxide breath test for measuring erythrocyte lifespan in small animals. BioMed. Res. Int. 2016, 7173156 (2016).PubMed 
PubMed Central 

Google Scholar 
Zhang, H.-D. et al. Human erythrocyte lifespan measured by Levitt’s CO breath test with newly developed automatic instrument. J. Breath. Res. 12, 036003 (2018).ADS 
CAS 
PubMed 
Article 

Google Scholar 
Hochachka, P. W. & Somero, G. N. Biochemical adaptation. (Oxford University Press, 2002).De Miranda, M. A., Schlater, A. E., Green, T. L. & Kanatous, S. B. In the face of hypoxia: myoglobin increases in response to hypoxic conditions and lipid supplementation in cultured Weddell seal skeletal muscle cells. J. Exp. Biol. 215, 806–813 (2012).PubMed 
Article 
CAS 

Google Scholar 
Kanatous, S. B. & Mammen, P. P. Regulation of myoglobin expression. J. Exp. Biol. 213, 2741–2747 (2010).CAS 
PubMed 
PubMed Central 
Article 

Google Scholar 
Halvorsen, S. & Bechensteen, A. G. Physiology of erythropoietin during mammalian development. Acta Paediatr. Suppl. 438, 17–26 (2002).Article 

Google Scholar 
Hochachka, P. W. Mechanism and evolution of hypoxia-tolerance in humans. J. Exp. Biol. 201, 1243–1254 (1998).CAS 
PubMed 
Article 

Google Scholar 
Klopfleisch, R. & Olias, P. The pathology of comparative animal models of human haemochromatosis. J. Comp. Pathol. 147, 460–478 (2012).CAS 
PubMed 
Article 

Google Scholar 
Henriksson, J. & Reitman, J. S. Time course of changes in human skeletal muscle succinate dehydrogenase and cytochrome oxidase activities and maximal oxygen uptake with physical activity and inactivity. Acta Physiol. Scand. 99, 91–97 (1977).CAS 
PubMed 
Article 

Google Scholar 
Goetz, K. T. Movement, habitat, and foraging behavior of Weddell seals (Leptonychotes weddellii) in the western Ross Sea, Antarctica, University of California Santa Cruz, (2015).Cisewski, B., Strass, V. H., Rhein, M. & Krägefsky, S. Seasonal variation of diel vertical migration of zooplankton from ADCP backscatter time series data in the Lazarev Sea, Antarctica. Deep Sea Res. Part I: Oceanographic Res. Pap. 57, 78–94 (2010).ADS 
CAS 
Article 

Google Scholar 
Jones, R. M. & Smith, W. O. The influence of short-term events on the hydrographic and biological structure of the southwestern Ross Sea. J. Mar. Syst. 166, 184–195 (2017).Article 

Google Scholar 
Smith, W. O. & Nelson, D. M. Importance of ice edge phytoplankton production in the Southern Ocean. Bioscience 36, 251–257 (1986).CAS 
Article 

Google Scholar 
Rivkin, R. B. Seasonal patterns of planktonic production in McMurdo Sound, Antarctica. Am. Zool. 31, 5–16 (2015).Article 

Google Scholar 
Proffitt, K. M., Rotella, J. J. & Garrott, R. A. Effects of pup age, maternal age, and birth date on pre-weaning survival rates of Weddell seals in Erebus Bay, Antarctica. Oikos 119, 1255–1264 (2010).Article 

Google Scholar 
Beltran, R. S., Kirkham, A. L., Breed, G. A., Testa, J. W. & Burns, J. M. Reproductive success delays moult phenology in a polar mammal. Sci. Rep. 9, 5221 (2019).ADS 
PubMed 
PubMed Central 
Article 
CAS 

Google Scholar 
Mellish, J.-A. E., Tuomi, P. A., Hindle, A. G. & Horning, M. Chemical immobilization of Weddell seals (Leptonychotes weddellii) by ketamine/midazolam combination. Vet. Anaesth. Analg. 37, 123–131 (2010).CAS 
PubMed 
Article 

Google Scholar 
Shero, M. R., Pearson, L. E., Costa, D. P. & Burns, J. M. Improving the precision of our ecosystem calipers: a modified morphometric technique for estimating marine mammal mass and body composition. PLoS ONE 9, e91233 (2014).ADS 
PubMed 
PubMed Central 
Article 

Google Scholar 
Foldager, N. & Blomqvist, C. G. Repeated plasma volume determination with the Evans blue dye dilution technique: the method and the computer program. Comput. Biol. Med. 21, 35–41 (1991).CAS 
PubMed 
Article 

Google Scholar 
El-Sayed, H., Goodall, S. R. & Hainsworth, F. R. Re-evaluation of Evans blue dye dilution method of plasma volume measurement. Clin. Lab. Haem. 17, 189–194 (1995).CAS 

Google Scholar 
Reynafarje, B. Simplified method for the determination of myoglobin. J. Lab. Clin. Med. 61, 138–145 (1963).CAS 
PubMed 

Google Scholar 
Prewitt, J. S., Freistroffer, D. V., Schreer, J. F., Hammill, M. O. & Burns, J. M. Postnatal development of muscle biochemistry in nursing harbor seal (Phoca vitulina) pups: Limitations to diving behavior? J. Comp. Physiol. B 180, 757–766 (2010).CAS 
PubMed 
Article 

Google Scholar 
Polasek, L., Dickson, K. A. & Davis, R. W. Metabolic indicators in the skeletal muscles of harbor seals (Phoca vitulina). Am. J. Physiol. Regul. Integr. Comp. Physiol. 290, R1720–R1727 (2006).CAS 
PubMed 
Article 

Google Scholar 
Kooyman, G. L., Castellini, M. A., Davis, R. W. & Maue, R. A. Aerobic diving limits of immature Weddell seals. J. Comp. Physiol. 151, 171–174 (1983).Article 

Google Scholar 
Davis, R. W. & Kanatous, S. B. Convective oxygen transport and tissue oxygen consumption in Weddell seals during aerobic dives. J. Exp. Biol. 202, 1091–1113 (1999).CAS 
PubMed 
Article 

Google Scholar 
Lenfant, C., Johansen, K. & Torrance, J. D. Gas transport and oxygen storage capacity in some pinnipeds and the sea otter. Respir. Physiol. 9, 277–286 (1970).CAS 
PubMed 
Article 

Google Scholar 
Kleiber, M. The fire of life: an introduction to animal energetics. (R.E. Krieger Pub. Co., 1975).Sato, K., Mitani, Y., Cameron, M. F., Siniff, D. B. & Naito, Y. Factors affecting stroking patterns and body angle in diving Weddell seals under natural conditions. J. Exp. Biol. 206, 1461–1470 (2003).PubMed 
Article 

Google Scholar 
Zuur, A. F., Hilbe, J. M. & Ieno, E. N. A Beginner’s Guide to GLM and GLMM with R: A Frequentist and Bayesian Perspective for Ecologists. (Highland Statistics Newburgh, 2013).Shero, M. Weddell seal iron dynamics and oxygen stores across lactation. U.S. Antarctic Program (USAP) Data Center. https://doi.org/10.15784/601575. (2022).Anderson, R. S. et al. Zinc, copper, iron and calcium concentrations in bitch milk. J. Nutr. 121, S81–S82 (1991).CAS 
PubMed 
Article 

Google Scholar 
Griffiths, M., Green, B., MC Leckie, R., Messer, M. & Newgrain, K. Constituents of platypus and echidna milk, with particular reference to the fatty acid complement of the triglycerides. Aust. J. Biol. Sci. 37, 323–330 (1984).CAS 
Article 

Google Scholar 
Peddemors, V. M., de Muelenaere, H. J. H. & Devchand, K. Comparative milk composition of the bottlenosed dolphin (Tursiops truncatus), humpback dolphin (Sousa plumbea) and common dolphin (Delphinus delphis) from southern African waters. Comp. Biochem. Physiol. Part A Physiol. 94, 639–641 (1989).CAS 
Article 

Google Scholar 
Ullrey, D. E. et al. Blue-green color and composition of Stejneger’s beaked whale (Mesoplodon stejnegeri) milk. Comp. Biochem. Physiol. B Comp. Biochem. 79, 349–352 (1984).CAS 
Article 

Google Scholar 
Dosako, S. I. et al. Milk of Northern fur seal: composition, especially carbohydrate and protein. J. Dairy Sci. 66, 2076–2083 (1983).CAS 
PubMed 
Article 

Google Scholar 
Oftedal, O. T., Boness, D. J. & Tedman, R. The Behavior, Physiology, and Anatomy of Lactation in the Pinnipedia. (Genoyways, H. H. eds) (Current Mammalogy. Springer, Boston, MA, 1987).Habran, S., Pomeroy, P. P., Debier, C. & Das, K. Changes in trace elements during lactation in a marine top predator, the grey seal. Aquat. Toxicol. 126, 455–466 (2013).CAS 
PubMed 
Article 

Google Scholar 
Seal, U. S., Erickson, A. W., Siniff, D. B. & Cline, D. R. Blood chemistry and protein polymorphisms in three species of Antarctic seals (Lobodon carcinophagus, Leptonychootes weddellii, and Mirounga leonina) In Antarctic Pinnipedia 181–192 (1971).Green, B., Fogerty, A., Libke, J., Newgrain, K. & Shaughnessy, P. Aspects of lactation in the crab-eater seal (Lobodon-Carcinophagus). Aust. J. Zool. 41, 203–213 (1993).Article 

Google Scholar 
Casey, C. E., Smith, A. & Zhang, P. Microminerals in human and animal milks, In Handbook of milk composition 622–674 (ed. R. G. Jensen) (Academic Press, 1995). More

Wirtz, K., Smith, S. L., Mathis, M. & Taucher, J. Nat. Clim. Change https://doi.org/10.1038/s41558-022-01430-5 (2022).Article 

Google Scholar 
Watanabe, M., Kohata, K. & Kimura, T. Limnol. Oceanogr. 36, 593–602 (1991).Article 

Google Scholar 
Villareal, T. A. et al. Nature 397, 423–425 (1999).CAS 
Article 

Google Scholar 
Krumhardt, K. M., Lovenduski, N. S., Iglesias-Rodriguez, M. D. & Kleypas, J. A. Prog. Oceanogr. 159, 276–295 (2017).Article 

Google Scholar 
Alldredge, A. L. & Silver, M. W. Prog. Oceanogr. 20, 41–82 (1988).Article 

Google Scholar 
White, A. E., Spitz, Y. H. & Letelier, R. M. Mar. Ecol. Prog. Ser. 323, 35–45 (2006).Article 

Google Scholar 
Kwiatkowski, L. et al. Biogeosciences 17, 3439–3470 (2020).CAS 
Article 

Google Scholar 
Tittensor, D. P. et al. Nat. Clim. Change 11, 973–981 (2021).Article 

Google Scholar 
Giorgetta, M. A. et al. J. Adv. Model. Earth Syst. 5, 572–597 (2013).Article 

Google Scholar 
McGillicuddy, D. J. et al. Nature 394, 263–266 (1998).CAS 
Article 

Google Scholar 
Lévy, M., Franks, P. J. & Smith, K. S. Nat. Commun. 9, 4758 (2018).Article 

Google Scholar 
Durham, W. M. & Stocker, R. Annu. Rev. Mar. Sci. 4, 177–207 (2012).Article 

Google Scholar 
Cullen, J. J. Annu. Rev. Mar. Sci. 7, 207–239 (2015).Article 

Google Scholar 
Moeller, H. V., Laufkötter, C., Sweeney, E. M. & Johnson, M. D. Nat. Commun. 10, 1978 (2019).Article 

Google Scholar 
Fawcett, S. E., Johnson, K. S., Riser, S. C., Van Oostende, N. & Sigman, D. M. Mar. Chem. 207, 108–123 (2018).CAS 
Article 

Google Scholar  More

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Zangoueinejad, R. & Alebrahim, M. T. Use of conventional and innovative organic materials as alternatives to black plastic mulch to suppress weeds in tomato production. Biol. Agric. Hortic. 37, 267–284. https://doi.org/10.1080/01448765.2021.1947377 (2021).Article 

Google Scholar 
Biswas, S. K., Akanda, A. R., Rahman, M. S. & Hossain, M. A. Effect of drip irrigation and mulching on yield, water-use efficiency and economics of tomato. Plant Soil Environ. 61, 97–102. https://doi.org/10.17221/804/2014-PSE (2015).Article 

Google Scholar 
Haapala, T., Palonen, P., Tamminen, A. & Ahokas, J. Effects of different paper mulches on soil temperature and yield of cucumber (Cucumis sativus L.) in the temperate zone. Agric. Food Sci. 24, 52–58. https://doi.org/10.23986/afsci.47220 (2015).CAS 
Article 

Google Scholar 
Shiukhy, S., Raeini-Sarjaz, M. & Chalavi, V. Colored plastic mulch microclimates affect strawberry fruit yield and quality. Int. J. Biometeorol. 59, 1061–1066. https://doi.org/10.1007/s00484-014-0919-0 (2015).ADS 
Article 
PubMed 

Google Scholar 
Sideman, R. G. Performance of sweetpotato cultivars grown using biodegradable black plastic mulch in New Hampshire. HortTechnology 25, 412–416. https://doi.org/10.21273/HORTTECH.25.3.412 (2015).Article 

Google Scholar 
Ferdous, Z., Datta, A. & Anwar, M. Plastic mulch and indigenous microorganism effects on yield and yield components of cauliflower and tomato in inland and coastal regions of Bangladesh. J. Crop Improv. 31, 261–279. https://doi.org/10.1080/15427528.2017.1293578 (2017).Article 

Google Scholar 
Lament, W. J. Jr. Plastic mulches for the production of vegetable crops. HortTechnology 3, 35–39. https://doi.org/10.21273/HORTTECH.3.1.35 (1993).Article 

Google Scholar 
Abdul-Baki, A. A., Teasdale, J. R., Goth, R. W. & Haynes, K. G. Marketable yields of fresh-market tomatoes grown in plastic and hairy vetch mulches. HortScience 37, 878–881. https://doi.org/10.21273/HORTSCI.37.6.878 (2002).Article 

Google Scholar 
Chalker-Scott, L. Impact of mulches on landscape plants and the environment—A review. J. Environ. Hortic. 25, 239–249. https://doi.org/10.24266/0738-2898-25.4.239 (2007).Article 

Google Scholar 
Kasirajan, S. & Ngouajio, M. Polyethylene and biodegradable mulches for agricultural applications: A review. Agron. Sustain. Dev. 32, 501–529. https://doi.org/10.1007/s13593-011-0068-3 (2012).CAS 
Article 

Google Scholar 
Iqbal, R. et al. Potential agricultural and environmental benefit of mulches—A review. Bull. Natl. Res. Cent. 44, 752020. https://doi.org/10.1186/s42269-020-00290-3 (2020).Article 

Google Scholar 
Travlos, I. et al. Efficacy of different herbicides on Echinocholoa colona (L.) Link control and the first case of its glyphosate resistance in Greece. Agronomy 10, 1056. https://doi.org/10.3390/agronomy10071056 (2000).CAS 
Article 

Google Scholar 
Travlos, I. S. & Chachalis, D. Glyphsate-resistant hairy fleabane (Conyza bonariensis) is reported in Greece. Weed Technol. 24, 569–573. https://doi.org/10.1614/WT-D-09-00080.1 (2010).CAS 
Article 

Google Scholar 
Tahmasebi, B. K. et al. Effectiveness of alternative herbicides on three Conyza species from Europe with and without glyphosate resistance. Crop Prot. 112, 350–355. https://doi.org/10.1016/j.cropro.2018.06.021 (2018).CAS 
Article 

Google Scholar 
Kanatas, P., Anthonopoulos, N., Gazoulis, I. & Travlos, I. S. Screening glyphosate-alternative weed control options in important perennial crops. Weed Sci. 69, 704–718. https://doi.org/10.1017/wsc.2021.55 (2021).Article 

Google Scholar 
Anthonopoulos, N. et al. Hot foam: Evaluation of a new, non-chemical weed control option in perennial crops. Smart Agric. Technol. 3, 1000063. https://doi.org/10.1016/j.atech.2022.100063 (2023).Article 

Google Scholar 
Espí, E., Salmerón, A., Fontecha, A., García, Y. & Real, A. I. Plastic films for agricultural applications. J. Plast. Film Sheeting 22, 85–102. https://doi.org/10.1177/8756087906064220 (2006).CAS 
Article 

Google Scholar 
Li, C. et al. Effects of biodegradable mulch on soil quality. Appl. Soil Ecol. 79, 59–69. https://doi.org/10.1016/j.apsoil.2014.02.012 (2014).ADS 
Article 

Google Scholar 
van Sebille, E. A global inventory of small floating plastic debris. Environ. Res. Lett. 10, 124006. https://doi.org/10.1088/1748-9326/10/12/124006 (2015).ADS 
Article 

Google Scholar 
Moreno, M. M., Cirujeda, A., Aibar, J. & Moreno, C. Soil thermal and productive responses of biodegradable mulch materials in a processing tomato (Lycopersicon esculentum Mill.). Crop. Soil Res. 54, 207–215. https://doi.org/10.1071/SR15065 (2016).Article 

Google Scholar 
Barnes, D. K. A., Galgani, F., Thompson, R. C. & Barlaz, M. Accumulation and fragmentation of plastic debris in global environments. Philos Trans. R. Soc. Lond. B Biol. Sci. 364, 1985–1998. https://doi.org/10.1098/rstb.2008.0205 (2009).CAS 
Article 
PubMed 
PubMed Central 

Google Scholar 
Moore, C. J. Synthetic polymers in the marine environment: A rapidly increasing, long-term threat. Environ. Res. 108, 131–139. https://doi.org/10.1016/j.envres.2008.07.025 (2008).CAS 
Article 
PubMed 

Google Scholar 
Lim, X. Microplastics are everywhere—But are they harmful?. Nature 593, 22–25. https://doi.org/10.1038/d41586-021-01143-3 (2021).ADS 
CAS 
Article 
PubMed 

Google Scholar 
Cardinael, Ŕ, Cadisch, G., Gosme, M., Oelbermann, M. & van Noordwik, M. Climate change mitigation and adaptation agriculture: Why agroforestry should be part of the solution. Agric. Ecosyst. Environ. 319, 107555. https://doi.org/10.1016/j.agee.2021.107555 (2021).Article 

Google Scholar 
Ji, S. & Unger, P. W. Soil water accumulation under different precipitation, potential evaporation, and straw mulch conditions. Soil Sci. Soc. Am. J. 65, 442–448. https://doi.org/10.2136/sssaj2001.652442x (2001).ADS 
CAS 
Article 

Google Scholar 
Schmithals, A. & Kühn, N. To mulch or not to mulch? Effects of gravel mulch toppings on plant establishment and development in ornamental prairie plantings. PLoS ONE 12, e0171533. https://doi.org/10.1371/journal.pone.0171533 (2017).CAS 
Article 
PubMed 
PubMed Central 

Google Scholar 
Pinamonti, F. Compost mulch effects on soil fertility, nutritional status and performance of grapevine. Nutr. Cycl. Agroecosyst. 51, 239–248. https://doi.org/10.1023/A:1009701323580 (1998).Article 

Google Scholar 
Cline, G. R. & Silvernail, A. F. Residual nitrogen and kill date effects on winter cover crop growth and nitrogen content in a vegetable production system. HortTechnology 11, 219–225. https://doi.org/10.21273/HORTTECH.11.2.219 (2001).CAS 
Article 

Google Scholar 
Cherr, C. M., Scholberg, J. M. S. & McSorley, R. Green manure approaches to crop production: A synthesis. Agron. J. 98, 302–319. https://doi.org/10.2134/agronj2005.0035 (2006).Article 

Google Scholar 
Nguyen, L. T. T., Ortner, K. A., Tiemann, L. K., Renner, K. A. & Kravchenko, A. N. Soil properties after one year of interseeded cover cropping in topographically diverse agricultural landscape. Agric. Ecosyst. Environ. 326, 107803. https://doi.org/10.1016/j.agee.2021.107803 (2021).CAS 
Article 

Google Scholar 
Breton, V., Crosaz, Y. & Rey, F. Effects of wood chip amendments on the revegetation performance of plant species on eroded marly terrains in a Mediterranean mountainous climate (Southern Alps, France). Solid Earth 7, 599–610. https://doi.org/10.5194/se-2016-11 (2016).ADS 
Article 

Google Scholar 
Wang, L., Gruber, S. & Claupein, W. Effects of woodchip mulch and barley intercropping on weeds in lentil crops. Weed Res. 52, 161–168. https://doi.org/10.1111/j.1365-3180.2012.00905.x (2012).Article 

Google Scholar 
Jabran, K. Use of mulches for managing field bindweed and purple nutsedge, and weed control in spinach. Int. J. Agric. Biol. 23, 1114–1120. https://doi.org/10.17957/IJAB/15.1394 (2020).CAS 
Article 

Google Scholar 
Keeley, J. E., Morton, B. A., Pedrosa, A. & Trotter, P. Role of allelopathy, heat and charred wood in the germination of chaparral herbs and suffrutescents. J. Ecol. 73, 445–458. https://doi.org/10.2307/2260486 (1985).Article 

Google Scholar 
Schumann, A. W., Little, K. M. & Eccles, N. S. Suppression of seed germination and early seedling growth by plantation harvest residues. S. Afr. J. Plant Soil 12, 170–172. https://doi.org/10.1080/02571862.1995.10634359 (1995).Article 

Google Scholar 
Rathinasabapathi, B., Ferguson, J. & Gal, M. Evaluation of allelopathic potential of wood chips for weed suppression in horticultural production systems. HortScience 40, 711–713. https://doi.org/10.21273/HORTSCI.40.3.711 (2005).Article 

Google Scholar 
Wezel, A. et al. Agroecological practices for sustainable agriculture. A review. Agron. Sustain. Dev. 34, 1–20. https://doi.org/10.1142/q0088 (2014).Article 

Google Scholar 
Rahmathulla, V. K. Management of climatic factors for successful silkworm (Bombyx mori L.) crop and higher silk production: A review. Psyche J. Entomol. 2012, 121234. https://doi.org/10.1155/2012/121234 (2012).Article 

Google Scholar 
Guttikunda, S. K. & Kopakka, R. V. Source emissions and health impacts of urban air pollution in Hyderadad, India. Air Qual. Atmos. Health 7, 195–207. https://doi.org/10.1007/s11869-013-0221-z (2014).CAS 
Article 

Google Scholar 
Dhaka, S. K. et al. PM2.5 diminution and haze events over Delhi during the COVID-19 lockdown period: An interplay between the baseline pollution and meteorology. Sci. Rep. 10, 13442. https://doi.org/10.1038/s41598-020-70179-8 (2020).ADS 
CAS 
Article 
PubMed 
PubMed Central 

Google Scholar 
Ehret, D. L., Helmer, T. & Hall, J. W. Cuticle cracking in tomato fruit. J. Hortic. Sci. 68, 195–201. https://doi.org/10.1080/00221589.1993.11516343 (1993).Article 

Google Scholar 
Peet, M. M. & Willits, D. H. Role of excess water in tomato fruit cracking. Hortic. Sci. 30, 65–68. https://doi.org/10.21273/HORTSCI.30.1.65 (1995).Article 

Google Scholar 
Ikeda, T., Sakamoto, Y., Watanabe, S. & Okano, K. Water relations in fruit cracking of single-truss tomato plants. Environ. Control Biol. 37, 153–158. https://doi.org/10.2525/ecb1963.37.153 (1999).Article 

Google Scholar 
Uetani, M., Fujitani, S. & Kimura, M. Mitigation techniques on fruit cracking in tomato cultivation under rain shelter in summer and autumn. Bull. Oita Pref Agr. For. Fish. Res. Cent. 4, 11–25 (2014) (in Japanese with English summary).
Google Scholar 
Kuhns, L. J. Efficacy and phytotoxicity of three landscape herbicides with and without a light mulch. Proc. Northeast. Weed Sci. Soc. 46, 85–89 (1992).
Google Scholar 
Petrikovszki, R., Zalai, M., Bogdányi, F. T. & Tóth, F. The effect of organic mulching and irrigation on the weed species composition and the soil weed seed bank of tomato. Plants 9, 66. https://doi.org/10.3390/plants9010066 (2020).Article 
PubMed Central 

Google Scholar 
Egley, G. H. Weed seed and seedling reductions by soil solarization with transparent polyethylene sheets. Weed Sci. 31, 404–409. https://doi.org/10.1017/S0043174500069253 (1983).Article 

Google Scholar 
Ashworth, S. & Harrison, H. Evaluation of mulches for use in the home garden. HortScience 18, 180–182 (1983).
Google Scholar 
Chakrabory, R. C. & Sadhu, M. K. Effect of mulch type and colour on growth and yield of tomato (Lycopersicon esculentum). Indian J. Agric. Sci. 64, 608–612 (1994).
Google Scholar 
Bhella, H. S. Tomato response to trickle irrigation and black polyethylene mulch. J. Am. Soc. Hortic. Sci. 113, 543–546 (1988).
Google Scholar 
Garnaud, J. C. The Intensification of Horticultural Crop Production in the Mediterranean Basin by Protected Cultivation (FAO of the United Nations, 1974).
Google Scholar 
Ahmad, S. et al. Significance of partial root zone drying and mulches for water saving and weed suppression in wheat. J. Anim. Plant Sci. 30, 154–162. https://doi.org/10.36899/japs.2020.1.0018 (2020).Article 

Google Scholar 
Ahmad, S. et al. Mulching strategies for weeds control and water conservation in cotton. ARPN J. Agric. Biol. Sci. 10, 299–306 (2015).
Google Scholar 
Hartwing, N. L. & Ammon, H. U. Cover crops and living mulches. Weed Sci. 50, 688–699. https://doi.org/10.1614/0043-1745(2002)050[0688:AIACCA]2.0.CO;2 (2002).Article 

Google Scholar 
Samedani, B., Ranjbar, M., Rahimian, H. & Jahansoz, M. R. Utilization of rye and hairy vetch cover crops for weed control in transplanted tomato. Pak. J. Biol. Sci. 9, 2323–2327. https://doi.org/10.3923/pjbs.2006.2323.2327 (2006).Article 

Google Scholar 
Pickering, J. S. & Shepherd, A. Evaluation of organic landscape mulches: composition and nutrient releases characteristics. Arboric J. 24, 175–187. https://doi.org/10.1080/03071375.2000.9747271 (2000).Article 

Google Scholar 
Marí, A. I., Pardo, G., Aibar, J. & Cirujeda, A. Purple nutsedge (Cyperus rotundus L.) control with biodegradable mulches and its effect on fresh pepper production. Sci. Hortic. 263, 109111. https://doi.org/10.1016/j.scienta.2019.109111 (2020).CAS 
Article 

Google Scholar 
R Development Core Team. R: A Language and Environment of Statistical Computing (R Foundation for Statistical Computing, 2019).
Google Scholar 
Kanda, Y. Investigation of the freely available easy-to-use software ‘EZR’ for medical statistics. Bone Marrow Transplant. 48, 452–458. https://doi.org/10.1038/bmt.2012.244 (2013).CAS 
Article 
PubMed 

Google Scholar  More

Westberry, T., Behrenfeld, M., Siegel, D. & Boss, E. Carbon-based primary productivity modeling with vertically resolved photoacclimation. Glob. Biogeochem. Cycles 22 (2008).Richardson, K. & Bendtsen, J. Vertical distribution of phytoplankton and primary production in relation to nutricline depth in the open ocean. Mar. Ecol. Prog. Ser. 620, 33–46 (2019).CAS 

Google Scholar 
Oschlies, A. in Ocean Modeling in an Eddying Regime (eds Hecht, M. W. & Hasumi, H.) 115–130 (AGU, 2008).Letscher, R. T., Primeau, F. & Moore, J. K. Nutrient budgets in the subtropical ocean gyres dominated by lateral transport. Nat. Geosci. 9, 815–819 (2016).CAS 

Google Scholar 
Johnson, K. S., Riser, S. C. & Karl, D. M. Nitrate supply from deep to near-surface waters of the North Pacific subtropical gyre. Nature 465, 1062–1065 (2010).CAS 

Google Scholar 
Fawcett, S. E., Lomas, M. W., Casey, J. R., Ward, B. B. & Sigman, D. M. Assimilation of upwelled nitrate by small eukaryotes in the Sargasso Sea. Nat. Geosci. 4, 717–722 (2011).CAS 

Google Scholar 
Knapp, A. N., Casciotti, K. L., Berelson, W. M., Prokopenko, M. G. & Capone, D. G. Low rates of nitrogen fixation in eastern tropical South Pacific surface waters. Proc. Natl Acad. Sci. USA 113, 4398–4403 (2016).CAS 

Google Scholar 
Böttjer, D. et al. Temporal variability of nitrogen fixation and particulate nitrogen export at station ALOHA. Limnol. Oceanogr. 62, 200–216 (2017).
Google Scholar 
Gruber, N., Keeling, C. D. & Stocker, T. F. Carbon-13 constraints on the seasonal inorganic carbon budget at the BATS site in the northwestern Sargasso Sea. Deep Sea Res. 1 45, 673–717 (1998).CAS 

Google Scholar 
Doney, S. C., Glover, D. M. & Najjar, R. G. A new coupled, one-dimensional biological–physical model for the upper ocean: applications to the JGOFS Bermuda Atlantic Time-series Study (BATS) site. Deep Sea Res. 2 43, 591–624 (1996).CAS 

Google Scholar 
Ascani, F. et al. Physical and biological controls of nitrate concentrations in the upper subtropical North Pacific Ocean. Deep Sea Res 2 93, 119–134 (2013).CAS 

Google Scholar 
Gran, H. H. in Rapport Vol. 56, 1–112 (Bureau du Conseil permanent international pour l’exploration de la mer, 1929).Hasle, G. R. Phototactic vertical migration in marine dinoflagellates. Oikos 2, 162–175 (1950).
Google Scholar 
Villareal, T. A. et al. Upward transport of oceanic nitrate by migrating diatom mats. Nature 397, 423–425 (1999).CAS 

Google Scholar 
Villareal, T. & Carpenter, E. Buoyancy regulation and the potential for vertical migration in the oceanic cyanobacterium Trichodesmium. Microb. Ecol. 45, 1–10 (2003).CAS 

Google Scholar 
Wirtz, K. & Smith, S. L. Vertical migration by bulk phytoplankton sustains biodiversity and nutrient input to the surface ocean. Sci. Rep. 10, 1142 (2020).CAS 

Google Scholar 
Silsbe, G. M., Behrenfeld, M. J., Halsey, K. H., Milligan, A. J. & Westberry, T. K. The CAFE model: a net production model for global ocean phytoplankton. Glob. Biogeochem. Cycles 30, 1756–1777 (2016).CAS 

Google Scholar 
Wang, W.-L., Moore, J. K., Martiny, A. C. & Primeau, F. W. Convergent estimates of marine nitrogen fixation. Nature 566, 205–211 (2019).CAS 

Google Scholar 
Karl, D. M., Letelier, R., Hebel, D. V., Bird, D. F. & Winn, C. D. in Marine Pelagic Cyanobacteria: Trichodesmium and Other Diazotrophs (eds Carpenter, E. J. et al.) 219–237 (Springer, 1992).Cullen, J. J. Subsurface chlorophyll maximum layers: enduring enigma or mystery solved? Ann. Rev. Mar. Sci. 7, 207–239 (2015).
Google Scholar 
Masuda, Y. et al. Photoacclimation by phytoplankton determines the distribution of global subsurface chlorophyll maxima in the ocean. Commun. Earth Environ. 2, 1–8 (2021).
Google Scholar 
Anugerahanti, P., Kerimoglu, O. & Smith, S. L. Enhancing ocean biogeochemical models with phytoplankton variable composition. Front. Mar. Sci. 8, 675428 (2021).
Google Scholar 
Pérez, V., Fernández, E., Marañón, E., Morán, X. A. G. & Zubkov, M. V. Vertical distribution of phytoplankton biomass, production and growth in the Atlantic subtropical gyres. Deep Sea Res. 1 53, 1616–1634 (2006).
Google Scholar 
Cornec, M. et al. Deep chlorophyll maxima in the global ocean: occurrences, drivers and characteristics. Glob. Biogeochem. Cycles 35, e2020GB006759 (2021).CAS 

Google Scholar 
Li, Q. P., Wang, Y., Dong, Y. & Gan, J. Modeling long-term change of planktonic ecosystems in the northern South China Sea and the upstream Kuroshio Current. J. Geophys. Res. 120, 3913–3936 (2015).
Google Scholar 
Latif, S., Ayub, Z. & Siddiqui, G. Seasonal variability of phytoplankton in a coastal lagoon and adjacent open sea in Pakistan. Turk. J. Botany 37, 398–410 (2013).CAS 

Google Scholar 
Liang, Y. et al. Nutrient-limitation induced diatom–dinoflagellate shift of spring phytoplankton community in an offshore shellfish farming area. Mar. Pollut. Bull. 141, 1–8 (2019).CAS 

Google Scholar 
Rahlff, J. et al. Short-term responses to ocean acidification: effects on relative abundance of eukaryotic plankton from the tropical Timor Sea. Mar. Ecol. Prog. Ser. 658, 59–74 (2021).CAS 

Google Scholar 
Kahru, M., Savchuk, O. & Elmgren, R. Satellite measurements of cyanobacterial bloom frequency in the Baltic Sea: interannual and spatial variability. Mar. Ecol. Prog. Ser. 343, 15–23 (2007).
Google Scholar 
Klais, R., Tamminen, T., Kremp, A., Spilling, K. & Olli, K. Decadal-scale changes of dinoflagellates and diatoms in the anomalous Baltic Sea spring bloom. PLoS ONE 6, e21567 (2011).CAS 

Google Scholar 
Klais, R., Norros, V., Lehtinen, S., Tamminen, T. & Olli, K. Community assembly and drivers of phytoplankton functional structure. Funct. Ecol. 31, 760–767 (2017).
Google Scholar 
Villareal, T. A., Pilskaln, C. H., Montoya, J. P. & Dennett, M. Upward nitrate transport by phytoplankton in oceanic waters: balancing nutrient budgets in oligotrophic seas. PeerJ 2, e302 (2014).
Google Scholar 
Mignot, A. et al. Understanding the seasonal dynamics of phytoplankton biomass and the deep chlorophyll maximum in oligotrophic environments: a bio-argo float investigation. Glob. Biogeochem. Cycles 28, 856–876 (2014).CAS 

Google Scholar 
Chen, B., Smith, S. L. & Wirtz, K. W. Effect of phytoplankton size diversity on primary productivity in the North Pacific: trait distributions under environmental variability. Ecol. Lett. 22, 56–66 (2019).
Google Scholar 
Cabré, A., Marinov, I. & Leung, S. Consistent global responses of marine ecosystems to future climate change across the IPCC AR5 Earth system models. Clim. Dyn. 45, 1253–1280 (2015).
Google Scholar 
Giorgetta, M. A. et al. Climate and carbon cycle changes from 1850 to 2100 in MPI-ESM simulations for the Coupled Model Intercomparison Project phase 5. J. Adv. Mod. Earth Sys. 5, 572–597 (2013).
Google Scholar 
Bopp, L. et al. Multiple stressors of ocean ecosystems in the 21st century: projections with CMIP5 models. Biogeosciences 10, 6225–6245 (2013).
Google Scholar 
Fu, W., Randerson, J. T. & Moore, J. K. Climate change impacts on net primary production (NPP) and export production (EP) regulated by increasing stratification and phytoplankton community structure in the CMIP5 models. Biogeosciences 13, 5151–5170 (2016).
Google Scholar 
Gliwicz, M. Z. Predation and the evolution of vertical migration in zooplankton. Nature 320, 746–748 (1986).
Google Scholar 
Huettel, M., Forster, S., Kloser, S. & Fossing, H. Vertical migration in the sediment-dwelling sulfur bacteria Thioploca spp. in overcoming diffusion limitations. Appl. Environ. Microbiol. 62, 1863–1872 (1996).CAS 

Google Scholar 
Waterbury, J. B., Willey, J. M., Franks, D. G., Valois, F. W. & Watson, S. W. A cyanobacterium capable of swimming motility. Science 230, 74–76 (1985).CAS 

Google Scholar 
McCarren, J. et al. Inactivation of swmA results in the loss of an outer cell layer in a swimming Synechococcus strain. J. Bacteriol. 187, 224–230 (2005).CAS 

Google Scholar 
Eppley, R. W., Holm-Hansen, O. & Strickland, J. D. Some observations on the vertical migration of dinoflagellates. J. Phycol. 4, 333–340 (1968).CAS 

Google Scholar 
Sengupta, A., Carrara, F. & Stocker, R. Phytoplankton can actively diversify their migration strategy in response to turbulent cues. Nature 543, 555–558 (2017).CAS 

Google Scholar 
Waite, A., Fisher, A., Thompson, P. & Harrison, P. Sinking rate verses cell volume relationships illuminate sinking rate control mechanisms in marine diatoms. Mar. Ecol. Prog. Ser. 157, 97–108 (1997).
Google Scholar 
Throndsen, J. Motility in some marine nanoplankton flagellates. Nor. J. Zool. 21, 193–200 (1973).
Google Scholar 
Gittleson, S. M., Hotchkiss, S. K. & Valencia, F. G. Locomotion in the marine dinoflagellate Amphidinium carterae (Hulburt). Trans. Am. Microsc. Soc. 93, 101–105 (1974).Barsanti, L. et al. Swimming patterns of the quadriflagellate Tetraflagellochloris mauritanica (Chlamydomonadales, Chlorophyceae). J. Phycol. 52, 209–218 (2016).
Google Scholar 
Schuech, R. & Menden-Deuer, S. Going ballistic in the plankton: anisotropic swimming behavior of marine protists. Limnol. Oceanogr. Fluids Environ. 4, 1–16 (2014).
Google Scholar 
Eppley, R. W., Holmes, R. W. & Strickland, J. D. Sinking rates of marine phytoplankton measured with a fluorometer. J. Exp. Mar. Biol. Ecol. 1, 191–208 (1967).
Google Scholar 
Bienfang, P. Phytoplankton sinking rates in oligotrophic waters off Hawaii, USA. Mar. Biol. 61, 69–77 (1980).
Google Scholar 
Lisicki, M., Rodrigues, M. F. V., Goldstein, R. E. & Lauga, E. Swimming eukaryotic microorganisms exhibit a universal speed distribution. Elife 8, e44907 (2019).CAS 

Google Scholar 
Moore, J. & Villareal, T. Buoyancy and growth characteristics of three positively buoyant marine diatoms. Mar. Ecol. Prog. Ser. 132 (1996).Hawaii Ocean Time-series (HOT) (School of Ocean and Earth Science and Technology at the University of Hawai’i, 2020); http://hahana.soest.hawaii.edu/hot/hot-dogsBermuda Atlantic Time-Series (BATS) (Bermuda Institure of Ocean Sciences, 2020); http://bats.bios.eduThe Japanese 55-Year Reanalysis (JRA-55) (Japan Meteorological Agency, 2020); http://jra.kishou.go.jp/JRA-55Ridgway, K., Dunn, J. & Wilkin, J. Ocean interpolation by four-dimensional weighted least squares—application to the waters around Australasia. J. Atmos. Ocean. Technol. 19, 1357–1375 (2002).
Google Scholar 
CSIRO Atlas of Regional Seas (CARS) (CSIRO, 2009); http://www.marine.csiro.au/~dunn/cars2009Ocean Colour (ESA-CCI, 2020); http://www.esa-oceancolour-cci.orgCloud (ESA-CCI, 2020); http://www.esa-cloud-cci.orgSea Surface Temperature (ESA-CCI, 2020); http://www.esa-sst-cci.orgRosati, A. & Miyakoda, K. A general circulation model for upper ocean simulation. J. Phys. Oceanogr. 18, 1601–1626 (1988).
Google Scholar 
Ralston, D. K., McGillicuddy, D. J. & Townsend, D. W. Asynchronous vertical migration and bimodal distribution of motile phytoplankton. J. Plankton Res. 29, 803–821 (2007).
Google Scholar 
Kamykowski, D. & Yamazaki, H. A study of metabolism-influenced orientation in the diel vertical migration of marine dinoflagellates. Limnol. Oceanogr. 42, 1189–1202 (1997).
Google Scholar 
Richardson, T. L., Cullen, J. J., Kelley, D. E. & Lewis, M. R. Potential contributions of vertically migrating Rhizosolenia to nutrient cycling and new production in the open ocean. J. Plankton Res. 20, 219–241 (1998).
Google Scholar 
Ross, O. N. & Sharples, J. Phytoplankton motility and the competition for nutrients in the thermocline. Mar. Ecol. Prog. Ser. 347, 21–38 (2007).CAS 

Google Scholar 
Chavez, F. P., Messié, M. & Pennington, J. T. Marine primary production in relation to climate variability and change. Ann. Rev. Mar. Sci. 3, 227–260 (2011).
Google Scholar 
Saba, V. et al. An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globe. Biogeosciences 8, 489–503 (2011).CAS 

Google Scholar 
Bhattathiri, P., Devassy, V. & Radhakrishna, K. Primary production in the Bay of Bengal during southwest monsoon of 1978. Mahasagar Bull. Natl Inst. Oceanogr. 13, 315–323 (1980).
Google Scholar 
Sarupria, J. & Bhargava, R. Seasonal primary production in different sectors of the EEZ of India. Mahasagar Bull. Natl Inst. Oceanogr. 26, 139–147 (1993).
Google Scholar 
Jyothibabu, R. et al. Differential response of winter cooling on biological production in the northeastern Arabian Sea and northwestern Bay of Bengal. Curr. Sci. 87, 783–791 (2004).
Google Scholar 
Kumar, S. P. et al. Is the biological productivity in the Bay of Bengal light limited? Curr. Sci. 98, 1331–1339 (2010).CAS 

Google Scholar 
Kumar, S. P. et al. Seasonal cycle of physical forcing and biological response in the Bay of Bengal. Ind. J. Mar. Sci. 39, 388–405 (2010).CAS 

Google Scholar 
Buitenhuis, E. T., Hashioka, T. & Quéré, C. L. Combined constraints on global ocean primary production using observations and models. Glob. Biogeochem. Cycles 27, 847–858 (2013).CAS 

Google Scholar  More

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Ceballos, G. et al. Accelerated modern human – induced species losses: entering the sixth mass extinction. Sci. Adv. 1, e1400253, https://doi.org/10.1126/sciadv.1400253 (2015).ADS 
Article 
PubMed 
PubMed Central 

Google Scholar 
Hoffmann, M. et al. The impact of conservation on the status of the world’s vertebrates. Science 330, 1503–1509, https://doi.org/10.1126/science.1194442 (2010).ADS 
CAS 
Article 
PubMed 

Google Scholar 
Whittaker, R. J. et al. Conservation biogeography: assessment and prospect. Divers. Distrib. 11, 3–23, https://doi.org/10.1111/j.1366-9516.2005.00143.x (2005).Article 

Google Scholar 
Dirzo, R. & Raven, P. H. Global state of biodiversity and loss. Annu. Rev. Env. Resour. 28, 137–167, https://doi.org/10.1146/annurev.energy.28.050302.105532 (2003).Article 

Google Scholar 
Dinerstein, E. et al. An ecoregion-based approach to protecting half the terrestrial realm. BioScience 67, 534–545, https://doi.org/10.1093/biosci/bix014 (2017).Article 
PubMed 
PubMed Central 

Google Scholar 
Brito, J. C. et al. Unravelling biodiversity, evolution and threats to conservation in the Sahara-Sahel. Biol. Rev. 89, 215–231, https://doi.org/10.1111/brv.12049 (2014).Article 
PubMed 

Google Scholar 
Sampaio, M. et al. Beyond the comfort zone: amphibian diversity and distribution in the West Sahara-Sahel using mtDNA and nuDNA barcoding and spatial modelling. Conserv. Genet. 22(2), 233–248, https://doi.org/10.1007/s10592-021-01331-8 (2021).Article 

Google Scholar 
Velo-Antón, G. et al. DNA barcode reference library for the West Sahara-Sahel reptiles, figshare, https://doi.org/10.6084/m9.figshare.20338335 (2022).Carranza, S., Arnold, E. N., Geniez, P., Roca, J. & Mateo, J. A. Radiation, multiple dispersal and parallelism in the skinks, Chalcides and Sphenops (Squamata: Scincidae), with comments on Scincus and Scincopus and the age of the Sahara Desert. Mol. Phyl. Evol. 46, 1071–1094, https://doi.org/10.1016/j.ympev.2007.11.018 (2008).CAS 
Article 

Google Scholar 
Gonçalves, D. V. et al. Phylogeny of North African Agama lizards (Reptilia: Agamidae) and the role of the Sahara desert in vertebrate speciation. Mol. Phyl. Evol. 64, 582–591, https://doi.org/10.1016/j.ympev.2012.05.007 (2012).Article 

Google Scholar 
Gonçalves, D. V. et al. The role of climatic cycles and trans-Saharan migration corridors in species diversification: biogeography of Psammophis schokari group in North Africa. Mol. Phyl. Evol. 118, 64–74, https://doi.org/10.1016/j.ympev.2017.09.009 (2018).Article 

Google Scholar 
Gonçalves, D. V. et al. Assessing the role of aridity-induced vicariance and ecological divergence in species diversification in North-West Africa using Agama lizards. Biol. J. Linn. Soc. 124, 363–380, https://doi.org/10.1093/biolinnean/bly055 (2018).Article 

Google Scholar 
Metallinou, M. et al. Conquering the Sahara and Arabian deserts: Systematics and biogeography of Stenodactylus geckos (Reptilia: Gekkonidae). BMC Evol. Biol. 12, 258, https://doi.org/10.1186/1471-2148-12-258 (2012).Article 
PubMed 
PubMed Central 

Google Scholar 
Metallinou, M. et al. Species on the rocks: Systematics and biogeography of the rock-dwelling Ptyodactylus geckos (Squamata: Phyllodactylidae) in North Africa and Arabia. Mol. Phyl. Evol. 85, 208–220, https://doi.org/10.1016/j.ympev.2015.02.010 (2015).Article 

Google Scholar 
Kapli, P. et al. Historical biogeography of the lacertid lizard Mesalina in North Africa and the Middle East. J. Biogeog. 42, 267–279, https://doi.org/10.1111/jbi.12420 (2015).Article 

Google Scholar 
Tamar, K., Geniez, P., Brito, J. C. & Crochet, P. A. Systematic revision of Acanthodactylus busacki (Squamata: Lacertidae) with a description of a new species from Morocco. Zootaxa 4276(3), 357–386, https://doi.org/10.11646/ZOOTAXA.4276.3.3 (2017).Article 

Google Scholar 
Velo-Antón, G., Martínez-Freiría, F., Pereira, P., Crochet, P.-A. & Brito, J. C. Living on the edge: ecological and genetic connectivity of the Spiny-footed lizard, Acanthodactylus aureus, confirms the Atlantic Sahara desert as biogeographic corridor and centre of lineage diversification. J. Biogeog. 45, 1031–1042, https://doi.org/10.1111/jbi.13176 (2018).Article 

Google Scholar 
Vale, C. G., Pimm, S. L. & Brito, J. C. Overlooked mountain rock pools in deserts are critical local hotspots of biodiversity. PLoS ONE 10, e0118367, https://doi.org/10.1371/journal.pone.0118367 (2015).CAS 
Article 
PubMed 
PubMed Central 

Google Scholar 
Brito, J. C. et al. Conservation Biogeography of the Sahara-Sahel: additional protected areas are needed to secure unique biodiversity. Divers. Distrib. 22, 371–384, https://doi.org/10.1111/ddi.12416 (2016).Article 

Google Scholar 
Hawlitschek, O. et al. Comprehensive DNA barcoding of the herpetofauna of Germany. Mol. Ecol. Res. 16, 242–253, https://doi.org/10.1111/1755-0998.12416 (2016).CAS 
Article 

Google Scholar 
Hebert, P. D. N., Cywinska, A., Ball, S. L. & Jeremy, R. Biological Identifications through DNA Barcodes. P. Roy. Soc. Lond. B Bio. 270, 313–321, https://doi.org/10.1098/rspb.2002.2218 (2003).CAS 
Article 

Google Scholar 
Murphy, R. W. et al. Cold Code: the global initiative to DNA barcode amphibians and nonavian reptiles. Mol. Ecol. Res. 13, 161–167, https://doi.org/10.1111/1755-0998.12050 (2013).CAS 
Article 

Google Scholar 
Vasconcelos, R. et al. Unexpectedly high levels of cryptic diversity uncovered by a complete DNA barcoding of reptiles of the Socotra Archipelago. PLoS ONE 11, e0149985, https://doi.org/10.1371/journal.pone.0149985 (2016).CAS 
Article 
PubMed 
PubMed Central 

Google Scholar 
Krishnamurthy, P. K. & Francis, R. A. A critical review on the utility of DNA barcoding in biodiversity conservation. Biodiv. Conserv. 21, 1901–1919, https://doi.org/10.1007/s10531-012-0306-2 (2012).Article 

Google Scholar 
DeSalle, R. & Amato, G. The expansion of conservation genetics. Nat. Rev. Genet. 5, 702–12, https://doi.org/10.7312/amat12832-006 (2004).CAS 
Article 
PubMed 

Google Scholar 
Campos, J. C. & Brito, J. C. Mapping underrepresented land cover heterogeneity in arid regions: the Sahara-Sahel example. ISPRS J. Photogramm 146, 211–220, https://doi.org/10.1016/j.isprsjprs.2018.09.012 (2018).Article 

Google Scholar 
Brito, J. C. et al. Armed conflicts and wildlife decline: Challenges and recommendations for effective conservation policy in the Sahara‐Sahel. Conserv. Lett. 11(5), e12446, https://doi.org/10.1111/conl.12446 (2018).Article 

Google Scholar 
Weiss, D. J. et al. A global map of travel time to cities to assess inequalities in accessibility in 2015. Nature 553, 333–336, https://doi.org/10.1038/nature25181 (2018).ADS 
CAS 
Article 
PubMed 

Google Scholar 
Geniez, P., Mateo, J. A. & Bons, J. A checklist of the amphibians and reptiles of Western Sahara (Amphibia, Reptilia). Herpetozoa 133, 149–63 (2000).
Google Scholar 
Geniez, P., Mateo, J. A., Geniez, M. & Pether, J. The Amphibians and Reptiles of the Western Sahara. An Atlas and Field Guide. Chimaira Editions (2004). Available at https://doi.org/10.1643/0045-8511(2007)2007[772:TAAROT]2.0.CO;2Trape, J. – F. & Mané, Y. Guide des Serpents d’Afrique Occidentale: Savane et Désert. IRD éditions (2006).Trape, J.-F., Trape, S. & Chirio, L. Lézards, Crocodiles et Tortues d’Afrique Occidentale et du Sahara. IRD éditions (2012).Dabney, J. et al. Complete mitochondrial genome sequence of a Middle Pleistocene cave bear reconstructed from ultrashort DNA fragments. Proc. Natl. Acad. Sci. USA 110, 15758–15763, https://doi.org/10.1073/pnas.1314445110 (2013).ADS 
Article 
PubMed 
PubMed Central 

Google Scholar 
Nagy, Z. T., Sonet, G., Glaw, F. & Vences, M. First large-scale DNA barcoding assessment of reptiles in the biodiversity hotspot of Madagascar, based on newly designed COI primers. PLoS ONE 7, e34506, https://doi.org/10.1371/journal.pone.0034506 (2012).ADS 
CAS 
Article 
PubMed 
PubMed Central 

Google Scholar 
Folmer, O., Black, M., Hoeh, W., Lutz, R. & Vrijenhoek, R. DNA primers for amplification of mitochondrial cytochrome c oxidase subunit I from diverse metazoan invertebrates. Mol. Mar. Biol. Biotechnol. 3, 294–299 (1994).CAS 
PubMed 

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

Google Scholar 
Kimura, M. A simple method for estimating evolutionary rates of base substitutions through comparative studies of nucleotide sequences. J. Mol. Evol. 16, 111–120, https://doi.org/10.1007/BF01731581 (1980).ADS 
CAS 
Article 
PubMed 

Google Scholar 
Brown, S. D. et al. Spider: An R package for the analysis of species identity and evolution, with particular reference to DNA barcoding. Mol. Ecol. Res. 12, 562–565, https://doi.org/10.1111/j.1755-0998.2011.03108.x (2012).ADS 
Article 

Google Scholar 
Meier, R., Shiyang, K., Vaidya, G. & Ng, P. K. L. DNA barcoding and taxonomy in diptera: a tale of high intraspecific variability and low identification success. Syst. Biol. 55, 715–728, https://doi.org/10.1080/10635150600969864 (2006).Article 
PubMed 

Google Scholar 
Pizzigalli, C. et al. Phylogeographic diversification of the Mesalina olivieri species complex (Squamata: Lacertidae) with the description of a new species and a new subspecies endemic from North West Africa. J. Zool. Syst. Evol. Res. 59, 2321–2349, https://doi.org/10.1111/jzs.12516 (2021).Article 

Google Scholar 
Mediannikov, O., Trape, S. & Trape, J.-F. A molecular study of the genus Agama (Squamata: Agamidae) in West Africa, with description of two new species and a review of the taxonomy, geographic distribution, and ecology of currently recognized species. Russ. J. Herpetol. 19, 115–142, https://doi.org/10.30906/1026-2296-2012-19-2-115-142 (2012).Article 

Google Scholar 
Wagner, P., Wilms, T. M., Bauer, A. & Böhme, W. Studies on African Agama. V. On the origin of Lacerta agama Linnaeus, 1758 (Squamata: Agamidae). Bonn. zool. Beitr. 56, 215–223 (2009).
Google Scholar  More

In this picture, I’m face to face with an anaesthetized 250-kilogram male grizzly bear (Ursus arctos horribilis), which was caught near Sparwood and Elkford in Canada. With help from conservation inspector Joe Caravetta, who is sitting next to me, and my field technician Laura Smit, I’m putting a GPS-enabled collar on the bear so that we can track his movements.The first time I worked with a bear this size, it was absolutely exhilarating, a real adrenaline rush. I thought, “My whole head could fit inside this animal’s jaws.” Over time, it has become fairly routine. I learnt to trust the anaesthetic — a mix of drugs given using an air-powered dart gun — and we constantly monitor the bears’ vital signs.While I’m attaching the collar, Laura collects hair samples for genetic studies. We measure the bear’s temperature and oxygen levels, and take hair samples to get an idea of his diet. We weigh him, which is quite a challenge: we use a custom-made tarpaulin with handles to wrap him up like a bear taco. We attach the handles to a hanging scale and, with a rope over a tree branch, winch him up. This particular bear is eight years old and has 29% body fat, which is very healthy for spring.Ultimately, the collars will help us to reduce conflict between bears and the people who live in the area — I’ve seen bears rip shed doors off to get to livestock, and peel open an outdoor freezer like a can of sardines.At times, it’s chaos for both humans and bears, and people react by shooting the bear — the most common cause of death for younger ones. Tracking bears with collars will help us to find solutions.From tracking the bears, we’ve learnt that they are adapting their habits to avoid people, and they become more nocturnal as they get older. We’ve helped local communities to adapt, too: we’ve launched cost-share initiatives for electrical fencing, which is a really effective bear deterrent. More