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Title: Litter quality and stream physicochemical properties drive global invertebrate effects on instream litter decomposition
Authors: Yue, Kai
De Frenne, Pieter
Van Meerbeek, Koenraad
Ferreira, Verónica 
Fornara, Dario A.
Wu, Qiqian
Ni, Xiangyin
Peng, Yan
Wang, Dingyi
Heděnec, Petr
Yang, Yusheng
Wu, Fuzhong
Peñuelas, Josep
Keywords: Decomposition rate; Mass loss; Climatic region; Litterbag; Decomposition stage; Meta-analysis
Issue Date: 2022
Publisher: Cambridge Philosophical Society; Wiley
Project: info:eu-repo/grantAgreement/EC/H2020/757833/EU/Microclimatic buffering of plant responses to macroclimate warming in temperate forests 
info:eu-repo/grantAgreement/FCT/CEEC IND 2018/CEECIND/02484/2018/CP1585/CT0010/PT/Not available 
info:eu-repo/grantAgreement/FCT/UIDP/04292/2020/PT/Marine and Environmental Sciences Centre 
Serial title, monograph or event: Biological Reviews
Abstract: Plant litter is the major source of energy and nutrients in stream ecosystems and its decomposition is vital for ecosystemnutrient cycling and functioning. Invertebrates are key contributors to instream litter decomposition, yet quantification oftheir effects and drivers at the global scale remains lacking. Here, we systematically synthesized data comprising 2707observations from 141 studies of stream litter decomposition to assess the contribution and drivers of invertebrates tothe decomposition process across the globe. We found that (1) the presence of invertebrates enhanced instream litterdecomposition globally by an average of 74%; (2) initial litter quality and stream water physicochemical properties wereequal drivers of invertebrate effects on litter decomposition, while invertebrate effects on litter decomposition were notaffected by climatic region, mesh size of coarse-mesh bags or mycorrhizal association of plants providing leaf litter;and (3) the contribution of invertebrates to litter decomposition was greatest during the early stages of litter mass loss(0–20%). Our results, besides quantitatively synthesizing the global pattern of invertebrate contribution to instream litterdecomposition, highlight the most significant effects of invertebrates on litter decomposition at early rather than middleor late decomposition stages, providing support for the inclusion of invertebrates in global dynamic models of litterdecomposition in streams to explore mechanisms and impacts of terrestrial, aquatic, and atmospheric carbonfluxes.
ISSN: 1464-7931
DOI: 10.1111/brv.12880
Rights: embargoedAccess
Appears in Collections:I&D MARE - Artigos em Revistas Internacionais

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