Litter quality and stream physicochemical properties drive global invertebrate effects on instream litter decomposition
Yue, Kai (Fujian Normal University)
De Frenne, Pieter (Ghent University)
Van Meerbeek, Koenraad (KU Leuven. Department of Earth and Environmental Sciences)
Ferreira, Verónica (University of Coimbra. Department of Life Sciences)
Fornara, Dario A. (Institute European Regenerative Organic Center (Italy))
Wu, Qiqian (Zhejiang A&F University)
Ni, Xiangyin (Fujian Normal University)
Peng, Yan (University of Copenhagen. Department of Geosciences and Natural Resource Management)
Wang, Dingyi (Fujian Normal University)
Heděnec, Petr (University Malaysia Terengganu. Institute of Tropical Biodiversity and Sustainable Development)
Yang, Yusheng (Fujian Normal University)
Wu, Fuzhong (Fujian Normal University)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2022
Resum:	Plant litter is the major source of energy and nutrients in stream ecosystems and its decomposition is vital for ecosystem nutrient cycling and functioning. Invertebrates are key contributors to instream litter decomposition, yet quantification of their effects and drivers at the global scale remains lacking. Here, we systematically synthesized data comprising 2707 observations from 141 studies of stream litter decomposition to assess the contribution and drivers of invertebrates to the decomposition process across the globe. We found that (1) the presence of invertebrates enhanced instream litter decomposition globally by an average of 74%; (2) initial litter quality and stream water physicochemical properties were equal drivers of invertebrate effects on litter decomposition, while invertebrate effects on litter decomposition were not affected 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 litter decomposition, highlight the most significant effects of invertebrates on litter decomposition at early rather than middle or late decomposition stages, providing support for the inclusion of invertebrates in global dynamic models of litter decomposition in streams to explore mechanisms and impacts of terrestrial, aquatic, and atmospheric carbon fluxes.
Ajuts:	European Commission 757833 Agencia Estatal de Investigación PID2019-110521GB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1005
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Decomposition rate ; Mass loss ; Litter quality ; Stream ecosystems ; Physicochemical properties ; Decomposition stage ; Linear-mixed model
Publicat a:	Biological reviews, Vol. 97, Issue 6 (December 2022) , p. 2023-2038, ISSN 1469-185X

DOI: 10.1111/brv.12880

Postprint 30 p, 652.6 KB

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