Functional consumers regulate the effect of availability of subsidy on trophic cascades in the Yellow River Delta, China
文献类型： 外文期刊
作者： Yan, Jiaguo 1 ; Cui, Baoshan 1 ; Huang, Honghui 4 ; O'Flynn, Sarah 2 ; Bai, Junhong 1 ; Ysebaert, Tom 2 ;
作者机构： 1.Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100875, Peoples R China
2.NIOZ Royal Netherlands Inst Sea Res, Dept Estuarine & Delta Syst, POB 140, NL-4400 AC Yerseke, Netherlands
3.Univ Utrecht, POB 140, NL-4400 AC Yerseke, Netherlands
4.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangdong Prov Key Lab Fishery Ecol & Environm, Guangzhou 510300, Guangdong, Peoples R China
关键词： Availability of leaf detritus; Recruitment; Foraging preference; Functional response; Macroinvertebrates; Resource retention
期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：5.553； 五年影响因子：5.907 ）
ISSN： 0025-326X
年卷期： 2019 年 140 卷
页码：
收录情况： SCI
摘要： Understanding the environmental context where heterogeneous ecological processes affect biotic interactions is a key aim of ecological research, However, mechanisms underlying spatial variation in trophic interactions linked to resource availability across ecosystem gradients remains unclear. We experimentally manipulated the interactive effects of predator fish and quantitative gradient of leaf detritus on macroinvertebrates and benthic algae. We found that non-linear changes in the strength of trophic cascades were strongly linked to the retention rates of experimental leaf detritus and also determined by predatory consumers. Retention rate of leaf detritus influenced the recruitment of predatory invertebrates and foraging preference of predators, accounting for largely the variations in shift of strengthening and weakening trophic cascades. Our results highlight the importance to identify joint processes of recruitment and foraging responses of functional consumer in understanding the impacts of both anthropogenic and natural alterations in subsidy on trophic interaction of coastal food webs.
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