气候变化领域集成服务门户(CCPortal): Species invasion progressively disrupts the trophic structure of native food webs

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DOI	10.1073/pnas.2102179118
	Species invasion progressively disrupts the trophic structure of native food webs
	Wainright C.A.; Muhlfeld C.C.; Elser J.J.; Bourret S.L.; Devlin S.P.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:45
英文摘要	Species invasions can have substantial impacts on native species and ecosystems, with important consequences for biodiversity. How these disturbances drive changes in the trophic structure of native food webs through time is poorly understood. Here, we quantify trophic disruption in freshwater food webs to invasion by an apex fish predator, lake trout, using an extensive stable isotope dataset across a natural gradient of uninvaded and invaded lakes in the northern Rocky Mountains, USA. Lake trout invasion increased fish diet variability (trophic dispersion), displaced native fishes from their reference diets (trophic displacement), and reorganized macroinvertebrate communities, indicating strong food web disruption. Trophic dispersion was greatest 25 to 50 y after colonization and dissipated as food webs stabilized in later stages of invasion (>50 y). For the native apex predator, bull trout, trophic dispersion preceded trophic displacement, leading to their functional loss in late-invasion food webs. Our results demonstrate how invasive species progressively disrupt native food webs via trophic dispersion and displacement, ultimately yielding biological communities strongly divergent from those in uninvaded ecosystems. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Bull trout; Food web; Invasive species; Lake trout; Stable isotope
语种	英语
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/238760
作者单位	Flathead Lake Biological Station, University of Montana, Polson, MT 59860, United States; Carterville Fish and Wildlife Conservation Office, US Fish and Wildlife Service, Wilmington, IL 60481, United States; Northern Rocky Mountain Science Center, US Geological Survey, Glacier National Park, West Glacier, MT 59936, United States; Fisheries Department, Montana Fish, Wildlife and Parks, Kalispell, MT 59901, United States
推荐引用方式 GB/T 7714	Wainright C.A.,Muhlfeld C.C.,Elser J.J.,et al. Species invasion progressively disrupts the trophic structure of native food webs[J],2021,118(45).
APA	Wainright C.A.,Muhlfeld C.C.,Elser J.J.,Bourret S.L.,&Devlin S.P..(2021).Species invasion progressively disrupts the trophic structure of native food webs.Proceedings of the National Academy of Sciences of the United States of America,118(45).
MLA	Wainright C.A.,et al."Species invasion progressively disrupts the trophic structure of native food webs".Proceedings of the National Academy of Sciences of the United States of America 118.45(2021).