Species richness and food-web structure jointly drive community biomass and its temporal stability in fish communities

被引：29
|
作者：
Danet, Alain [1 ]
Mouchet, Maud [1 ]
Bonnaffe, Willem [2 ]
Thebault, Elisa [3 ]
Fontaine, Colin [1 ]
机构：
[1] Sorbonne Univ, Ctr Ecol & Sci Conservat, Museum Natl Hist Nat Paris, UMR 7204,CNRS, Paris, France
[2] Univ Oxford, Dept Zool, Ecol & Evolutionary Dynam Lab, Oxford, England
[3] Univ Paris Est Creteil, Sorbonne Univ, Inst Ecol & Environm Sci Paris iEES Paris, INRAE,IRD,CNRS, Paris, France
来源：
ECOLOGY LETTERS | 2021年 / 24卷 / 11期
关键词：
biomass; ecosystem functioning; fish; foodweb; natural settings; network structure; species richness; stability; synchrony; temperature; BODY-SIZE; ECOSYSTEM SIZE; CHAIN LENGTH; PLANT DIVERSITY; WARMING ALTERS; BIODIVERSITY; PRODUCTIVITY; DYNAMICS; PATTERNS; COMPLEMENTARITY;
D O I：
10.1111/ele.13857
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
Biodiversity-ecosystem functioning and food-web complexity-stability relationships are central to ecology. However, they remain largely untested in natural contexts. Here, we estimated the links among environmental conditions, richness, food-web structure, annual biomass and its temporal stability using a standardised monitoring dataset of 99 stream fish communities spanning from 1995 to 2018. We first revealed that both richness and average trophic level are positively related to annual biomass, with effects of similar strength. Second, we found that community stability is fostered by mean trophic level, while contrary to expectation, it is decreased by species richness. Finally, we found that environmental conditions affect both biomass and its stability mainly via effects on richness and network structure. Strikingly, the effect of species richness on community stability was mediated by population stability rather than synchrony, which contrasts with results from single trophic communities. We discuss the hypothesis that it could be a characteristic of multi-trophic communities.
引用
收藏
页码：2364 / 2377
页数：14
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