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Functional redundancy dampens the trophic cascade effect of a web-building spider in a tropical forest floor
Liu, Shengjie; Behm, Jocelyn E.; Chen, Jin; ......; Yang, Xiaodong
2016
Source PublicationSOIL BIOLOGY & BIOCHEMISTRY
Volume98Issue:xPages:22-29
AbstractThe trophic cascade effect of predators on ecosystem functioning is generally believed to be less frequent and weaker in detritus-based than primary producer-based food webs, in part because of functional redundancy among soil fauna. Despite this view, no empirical studies have explicitly examined roles of different soil fauna within trophic levels in mediating cascading effects of predators in detritus food webs. Here we manipulated the density of a dominant funnel-web building spider Macrothele yunnanica in permanent plots (1 m(2)) for one year. Three spider treatments were applied: 0 spiders, 6 spiders (natural density) and 10 spiders (high density). We found that although changes in spider densities caused large shifts in litter-dwelling Collembola community composition on average, modifying spider densities did not generate a trophic cascade effect and alter litter decomposition in litter bags with coarse mesh (2 mm). Our data supports the hypothesis that functional redundancy among Collembola species may weaken the strength of spider-initiated cascading effects. Consequently, changes in Collembola diversity occupying the same trophic level may not significantly alter ecosystem function in tropical forest-floor ecosystems.
KeywordFunctional Redundancy Trophic Cascade Effect Detritus-based Food Webs Spiders Tropical Forest-floor Litter Decomposition
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/9983
Collection土壤生态组
Recommended Citation
GB/T 7714
Liu, Shengjie,Behm, Jocelyn E.,Chen, Jin,et al. Functional redundancy dampens the trophic cascade effect of a web-building spider in a tropical forest floor[J]. SOIL BIOLOGY & BIOCHEMISTRY,2016,98(x):22-29.
APA Liu, Shengjie,Behm, Jocelyn E.,Chen, Jin,......,&Yang, Xiaodong.(2016).Functional redundancy dampens the trophic cascade effect of a web-building spider in a tropical forest floor.SOIL BIOLOGY & BIOCHEMISTRY,98(x),22-29.
MLA Liu, Shengjie,et al."Functional redundancy dampens the trophic cascade effect of a web-building spider in a tropical forest floor".SOIL BIOLOGY & BIOCHEMISTRY 98.x(2016):22-29.
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