气候变化领域集成服务门户(CCPortal): Connectivity increases trophic subsidies in fragmented landscapes

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DOI	10.1111/ele.12958
	Connectivity increases trophic subsidies in fragmented landscapes
	Hawn C.L.; Herrmann J.D.; Griffin S.R.; Haddad N.M.
发表日期	2018
ISSN	1461023X
卷号	21 期号:11
英文摘要	Landscape corridors mitigate the negative effects of habitat fragmentation by increasing dispersal. Corridors also increase biodiversity in connected habitat fragments, suggestive of metacommunity dynamics. What is unknown in this case is the mechanisms through which metacommunity dynamics act. Working in a large-scale fragmentation experiment, we tested the effect of corridors on the movement of prey species and subsequent effects on predator nutrition (which we call trophic subsidies). We enriched plants of central patches with 15N, then measured δ15N in green lynx spiders, the most abundant insect predator, in patches that were either connected to or isolated from the enriched patch. We found that corridors increased prey movement, as they increased spider δ15N by 40% in connected patches. Corridors also improved spider body condition, increasing nitrogen relative to carbon. We suggest a novel mechanism, trophic subsidies, through which corridors may increase the stability or size of populations in connected landscapes. © 2018 John Wiley & Sons Ltd/CNRS
英文关键词	Connectivity; corridors; habitat fragmentation; metacommunities; predators; spiders; trophic subsidies
语种	英语
scopus关键词	Araneae; Hexapoda; Oxyopidae; carbon; nitrogen; biodiversity; ecosystem; plant; Biodiversity; Carbon; Ecosystem; Nitrogen; Plants
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/121231
作者单位	Geography and Environmental Systems, University of Maryland Baltimore County, Baltimore, MD, United States; Department of Landscape Ecology, Kiel University, Kiel, Germany; Kellogg Biological Station, Department of Integrative Biology, Michigan State University, Hickory Corners, MI, United States
推荐引用方式 GB/T 7714	Hawn C.L.,Herrmann J.D.,Griffin S.R.,et al. Connectivity increases trophic subsidies in fragmented landscapes[J],2018,21(11).
APA	Hawn C.L.,Herrmann J.D.,Griffin S.R.,&Haddad N.M..(2018).Connectivity increases trophic subsidies in fragmented landscapes.Ecology Letters,21(11).
MLA	Hawn C.L.,et al."Connectivity increases trophic subsidies in fragmented landscapes".Ecology Letters 21.11(2018).