气候变化领域集成服务门户(CCPortal): HSS revisited: Multi-channel processes mediate trophic control across a productivity gradient

CCPortal

DOI	10.1111/ele.12498
	HSS revisited: Multi-channel processes mediate trophic control across a productivity gradient
	Ward C.L.; Mccann K.S.; Rooney N.
发表日期	2015
ISSN	1461-023X
EISSN	1461-0248
卷号	18 期号:11
英文摘要	Classical food web theory holds that energy channels are regulated by top-down control with increasing productivity, arising from within-channel processes. However, these hypotheses do not consider the existence of parallel energy channels linked by shared resource pools and which can fuel generalist predators, imposing trophic control arising from multi-channel processes. Using 23 large marine food webs, we show that food web responses to increasing productivity are consistent with the apparent trophic cascade hypothesis (ATCH) - with rising productivity predators derive an increasing fraction of their diet from increasingly productive bottom-up controlled detritus channels, thereby subsidising predator biomass, and in turn strengthening top-down control in parallel grazing channels. These results testify to a fundamental role of detritus channels specifically and multi-channel processes in general in mediating food web response to productivity and demonstrate that the ATCH provides an alternative explanation for classical predictions of top-down control. © 2015 John Wiley & Sons Ltd/CNRS.
英文关键词	Apparent trophic cascade; Detritus; Food webs; Productivity; Trophic control
学科领域	apparent competition; detritus; diet; food web; grazing; top-down control; trophic cascade; trophic control
语种	英语
scopus关键词	apparent competition; detritus; diet; food web; grazing; top-down control; trophic cascade; trophic control
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/118616
作者单位	Department of Integrative Biology, University of Guelph, Guelph, ON N1G 2W1, Canada; National Center for Ecological Analysis and Synthesis, University of California, Santa Barbara, 735 State Street, Suite 300, Santa Barbara, CA 93101-5504, United States; School of Environmental Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada; Saugeen Ojibway Nation, R. R. #5, Wiarton, ON N0H 2T0, Canada
推荐引用方式 GB/T 7714	Ward C.L.,Mccann K.S.,Rooney N.. HSS revisited: Multi-channel processes mediate trophic control across a productivity gradient[J],2015,18(11).
APA	Ward C.L.,Mccann K.S.,&Rooney N..(2015).HSS revisited: Multi-channel processes mediate trophic control across a productivity gradient.Ecology Letters,18(11).
MLA	Ward C.L.,et al."HSS revisited: Multi-channel processes mediate trophic control across a productivity gradient".Ecology Letters 18.11(2015).