气候变化领域集成服务门户(CCPortal): Nutrient dilution and climate cycles underlie declines in a dominant insect herbivore

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DOI	10.1073/pnas.1920012117
	Nutrient dilution and climate cycles underlie declines in a dominant insect herbivore
	Welti E.A.R.; Roeder K.A.; De Beurs K.M.; Joern A.; Kaspari M.
发表日期	2020
ISSN	0027-8424
起始页码	7271
结束页码	7275
卷号	117 期号:13
英文摘要	Evidence for global insect declines mounts, increasing our need to understand underlying mechanisms. We test the nutrient dilution (ND) hypothesis-the decreasing concentration of essential dietary minerals with increasing plant productivity-that particularly targets insect herbivores. Nutrient dilution can result from increased plant biomass due to climate or CO2 enrichment. Additionally, when considering long-term trends driven by climate, one must account for large-scale oscillations including El Niño Southern Oscillation (ENSO), North Atlantic Oscillation (NAO), and Pacific Decadal Oscillation (PDO). We combine long-term datasets of grasshopper abundance, climate, plant biomass, and end-of-season foliar elemental content to examine potential drivers of abundance cycles and trends of this dominant herbivore. Annual grasshopper abundances in 16- and 22-y time series from a Kansas prairie revealed both 5-y cycles and declines of 2.1-2.7%/y. Climate cycle indices of spring ENSO, summer NAO, and winter or spring PDO accounted for 40-54% of the variation in grasshopper abundance, mediated by effects of weather and host plants. Consistent with ND, grass biomass doubled and foliar concentrations of N, P, K, and Na-nutrients which limit grasshopper abundance-declined over the same period. The decline in plant nutrients accounted for 25% of the variation in grasshopper abundance over two decades. Thus a warming, wetter, more CO2-enriched world will likely contribute to declines in insect herbivores by depleting nutrients from their already nutrient-poor diet. Unlike other potential drivers of insect declines-habitat loss, light and chemical pollution-ND may be widespread in remaining natural areas. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Acrididae; Global change; Grasshopper; Grassland; Insect decline
语种	英语
scopus关键词	carbon dioxide; mineral; nitrogen; phosphorus; potassium; sodium; carbon dioxide; nitrogen; phosphorus; potassium; sodium; Article; biomass; Caelifera; climate; climate warming; concentration (parameter); decomposition; dilution; El Nino; herbivore; Kansas; nonhuman; North Atlantic oscillation; nutrient content; oscillation; plant nutrient; plant product; pollution; population abundance; prairie; prediction; priority journal; species habitat; spring; summer; trend study; urban area; winter; climate; climate change; controlled study; habitat loss; insect; nutrient concentration; nutrient dilution; nutritional parameters; Pacific Decadal Oscillation; plant biomass; plant insect interaction; seasonal variation; synecology; weather; animal; Caelifera; climate change; demography; ecosystem; environmental protection; grassland; herbivory; insect; Poaceae; season; Animals; Biomass; Climate Change; Conservation of Natural Resources; Demography; Ecosystem; El Nino-Southern Oscillation; Grasshoppers; Grassland; Herbivory; Insecta; Kansas; Nutrients; Poaceae; Seasons; Weather
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/161010
作者单位	Welti, E.A.R., Geographical Ecology Group, Department of Biology, University of Oklahoma, Norman, OK 73019, United States; Roeder, K.A., Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States; De Beurs, K.M., Department of Geography and Environmental Sustainability, University of Oklahoma, Norman, OK 73019, United States; Joern, A., Division of Biology, Kansas State University, Manhattan, KS 66506, United States; Kaspari, M., Geographical Ecology Group, Department of Biology, University of Oklahoma, Norman, OK 73019, United States
推荐引用方式 GB/T 7714	Welti E.A.R.,Roeder K.A.,De Beurs K.M.,et al. Nutrient dilution and climate cycles underlie declines in a dominant insect herbivore[J],2020,117(13).
APA	Welti E.A.R.,Roeder K.A.,De Beurs K.M.,Joern A.,&Kaspari M..(2020).Nutrient dilution and climate cycles underlie declines in a dominant insect herbivore.Proceedings of the National Academy of Sciences of the United States of America,117(13).
MLA	Welti E.A.R.,et al."Nutrient dilution and climate cycles underlie declines in a dominant insect herbivore".Proceedings of the National Academy of Sciences of the United States of America 117.13(2020).