DOI: 10.1073/pnas.1920012117
论文题名: Nutrient dilution and climate cycles underlie declines in a dominant insect herbivore
作者: Welti E.A.R. ; Roeder K.A. ; De Beurs K.M. ; Joern A. ; Kaspari M.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期: 13 起始页码: 7271
结束页码: 7275
语种: 英语
英文关键词: Acrididae
; Global change
; Grasshopper
; Grassland
; Insect decline
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164268
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(13)