globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13310
论文题名:
Direct and indirect effects of glaciers on aquatic biodiversity in high Andean peatlands
作者: Quenta E.; Molina-Rodriguez J.; Gonzales K.; Rebaudo F.; Casas J.; Jacobsen D.; Dangles O.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期:9
起始页码: 3196
结束页码: 3205
语种: 英语
英文关键词: aquatic biodiversity ; environmental heterogeneity ; glacial influence ; high Andean peatlands ; peatland area ; tropical Andes
Scopus关键词: alpine environment ; aquatic ecosystem ; biodiversity ; climate effect ; glacier ; heterogeneity ; peatland ; tropical environment ; Andes ; algae ; Cladocera
英文摘要: The rapid melting of glacier cover is one of the most obvious impacts of climate change on alpine ecosystems and biodiversity. Our understanding of the impact of a decrease in glacier runoff on aquatic biodiversity is currently based on the ‘glacier-heterogeneity-diversity’ paradigm, according to which there is high α-diversity at intermediate levels of glacial influence due to the high degree of environmental heterogeneity caused by glacier water. This α-diversity pattern generates high levels of between-site aquatic community variation (high β diversity) and increases regional diversity (γ-diversity). There is a rich conceptual background in favor of this paradigm, but empirical data supporting it are scarce. We investigated this paradigm by analyzing the different diversity patterns (α, β and γ-diversity) of four aquatic groups (zooplankton, macroinvertebrates, algae and macrophytes) living in high-elevation peatlands (>4500 m above sea level). We sampled 200 pools from 20 peatlands along a glacier gradient in the Cordillera Real of Bolivia. We performed structural equation modeling (SEM) to analyze the potential mechanisms underlying the observed diversity patterns. Intermediate levels of glacial influence (15–20% cover) resulted in high heterogeneity, but α-diversity responded to glacial influence only for the zooplankton group (Cladocera). Our SEM analysis did not identify environmental heterogeneity as a significant variable explaining the relationship between glacier and α-diversity. Peatland area had a strong positive effect on heterogeneity and diversity. β-diversity was significantly associated with glacier gradient, and 12.9% of the total regional diversity (γ-diversity) was restricted to peatlands with a high degree of glacial influence. These species might be lost in a context of glacial retreat. These findings provide new insight into the potential effects of glacial retreat on the aquatic environment and biodiversity in the peatlands of the tropical Andes. © 2016 John Wiley & Sons Ltd
资助项目: We thank Kay Vandamme, Alexey Kotob and Artem Sinev for assistance with the identification of zooplankton species and for providing references. We also thank to anonymous reviewers for their constructive comments. This work was funded by the Fond Français pour l'Environnement Mondial (FFEM) and the Fondation pour la Recherche sur la Biodiversité (FRB) (Modeling biodiversity and land use interactions under changing glacial water availability in tropical high Andean wetlands-BIOTHAW, AAP-SCEN-2011-II). E. Quenta was supported by an Erasmus Mundus Action 2 SUD-UE grant.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61319
Appears in Collections:影响、适应和脆弱性

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作者单位: Institut de Recherche sur la Biologie de l'Insecte (IRBI), Université François-Rabelais, Tours, Tours, France; Institut de Recherche pour le Développement (IRD), UMR EGCE-UnivParisSud-CNRS-IRD-ParisSaclay, Gif-sur Yvette, France; Unidad de Limnología, Instituto de Ecología, Universidad Mayor San Andrés, calle 27 Cota Cota, La Paz, Bolivia; Centro de Análisis Espacial, Instituto de Ecología, Universidad Mayor San Andrés, calle 27 Cota Cota, La Paz, Bolivia; Freshwater Biological Laboratory, Department of Biology, University of Copenhagen, Universitetsparken 4, Copenhagen, Denmark; Escuela de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, 12 de Octubre, 1076 y Roca, Quito, Ecuador

Recommended Citation:
Quenta E.,Molina-Rodriguez J.,Gonzales K.,et al. Direct and indirect effects of glaciers on aquatic biodiversity in high Andean peatlands[J]. Global Change Biology,2016-01-01,22(9)
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