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Article Dans Une Revue Proceedings of the Royal Society B: Biological Sciences Année : 2016

Biotic and abiotic variables influencing plant litter breakdown in streams: a global study

1 Ikerbasque - Basque Foundation for Science
2 JCU - James Cook University
3 Stellenbosch University
4 African Institute of Mathematical Sciences
5 IGB - Leibniz-Institut für Gewässerökologie und Binnenfischerei
6 TU - Technical University of Berlin / Technische Universität Berlin
7 UC Santa Barbara - University of California [Santa Barbara]
8 Universidade de Coimbra [Coimbra]
9 University of Michigan [Ann Arbor]
10 UNCOMA - Universidad Nacional del Comahue [Neuquén]
11 Manonmaniam Sundaranar university (INDIA)
12 UTAS - University of Tasmania [Hobart, Australia]
13 UNE - University of New England
14 EAWAG - Swiss Federal Insitute of Aquatic Science and Technology [Dübendorf]
15 ETH Zürich - Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich]
16 UFMG - Universidade Federal de Minas Gerais = Federal University of Minas Gerais [Belo Horizonte, Brazil]
17 LEFE - Laboratoire Ecologie Fonctionnelle et Environnement
18 HKU - The University of Hong Kong
19 USFQ - Universidad San Francisco de Quito
20 Universidad de Concepción - University of Concepcion [Chile]
21 Cornell University [New York]
22 UnB - Universidade de Brasilia [Brasília]
23 University of Toronto
24 Yamanashi University
25 Monash University [Malaysia]
26 Egerton University
27 UNAM - Universidad Nacional Autónoma de México = National Autonomous University of Mexico
28 Universidad Vila Velha - UVV (BRAZIL)
29 University of Georgia [USA]
30 UPR - University of Puerto Rico
31 LUZ - Universidad del Zulia
32 UDA - Universidad del Azuay
Javier Pérez
  • Fonction : Auteur
Russell G. Death
  • Fonction : Auteur
Verónica Ferreira
Tomoya Iwata

Résumé

Plant litter breakdown is a key ecological process in terres- trial and freshwater ecosystems. Streams and rivers, in particular, contribute substantially to global carbon fluxes. However, there is little information available on the relative roles of different drivers of plant litter break- down in fresh waters, particularly at large scales. We present a global-scale study of litter breakdown in streams to compare the roles of biotic, climatic and other environ- mental factors on breakdown rates. We conducted an experiment in 24 streams encompassing latitudes from 47.88 N to 42.88 S, using litter mixtures of local species dif- fering in quality and phylogenetic diversity (PD), and alder (Alnus glutinosa) to control for variation in litter traits. Our models revealed that breakdown of alder was driven by climate, with some influence of pH, whereas variation in breakdown of litter mixtures was explained mainly by litter quality and PD. Effects of litter quality and PD and stream pH were more positive at higher temp- eratures, indicating that different mechanisms may operate at different latitudes. These results reflect global variability caused by multiple factors, but unexplained variance points to the need for expanded global-scale comparisons.
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Dates et versions

hal-01360648 , version 1 (06-09-2016)

Identifiants

Citer

Luz Boyero, Richard G. Pearson, Cang Hui, Mark O. Gessner, Javier Pérez, et al.. Biotic and abiotic variables influencing plant litter breakdown in streams: a global study. Proceedings of the Royal Society B: Biological Sciences, 2016, vol. 283 (n° 1829), pp. 1-10. ⟨10.1098/rspb.2015.2664⟩. ⟨hal-01360648⟩
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