DOI: 10.1111/gcb.14109
Scopus记录号: 2-s2.0-85048217108
论文题名: Warming weakens facilitative interactions between decomposers and detritivores, and modifies freshwater ecosystem functioning
作者: Bernabé T.N. ; de Omena P.M. ; Santos V.P.D. ; de Siqueira V.M. ; de Oliveira V.M. ; Romero G.Q.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 7 起始页码: 3170
结束页码: 3186
语种: 英语
英文关键词: bacterial community
; decomposition
; detritivore
; ecosystem functioning
; facilitation
; global warming
Scopus关键词: decomposition
; ecosystem function
; freshwater ecosystem
; global warming
; microbial community
; nutrient enrichment
; temperature effect
; Bacteria (microorganisms)
英文摘要: Warming is among the major drivers of changes in biotic interactions and, in turn, ecosystem functioning. The decomposition process occurs in a chain of facilitative interactions between detritivores and microorganisms. It remains unclear, however, what effect warming may have on the interrelations between detritivores and microorganisms, and the consequences for the functioning of natural freshwater ecosystems. To address these gaps, we performed a field experiment using tank bromeliads and their associated aquatic fauna. We manipulated the presence of bacteria and detritivorous macroinvertebrates (control, “bacteria,” and “bacteria + macroinvertebrates”) under ambient and warming scenarios, and analyzed the effects on the microorganisms and ecosystem functioning (detritus mass loss, colored dissolved organic matter, and nitrogen flux). We applied antibiotic solution to eliminate or reduce bacteria from control bromeliads. After 60 days incubation, bacterial density was higher in the presence than in the absence of macroinvertebrates. In the absence of macroinvertebrates, temperature did not influence bacterial density. However, in the presence of macroinvertebrates, bacterial density decreased by 54% with warming. The magnitude of the effects of organisms on ecosystem functioning was higher in the combined presence of bacteria and macroinvertebrates. However, warming reduced the overall positive effects of detritivores on bacterial density, which in turn, cascaded down to ecosystem functioning by decreasing decomposition and nitrogen flux. These results show the existence of facilitative mechanisms between bacteria and detritivores in the decomposition process, which might collapse due to warming. Detritivores seem to contribute to nutrient cycling as they facilitate bacterial populations, probably by increasing nutrient input (feces) in the ecosystem. However, increased temperature mitigated these beneficial effects. Our results add to a growing research body that shows that warming can affect the structure of aquatic communities, and highlight the importance of considering the interactive effects between facilitation and climatic drivers on the functioning of freshwater ecosystems. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110346
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Pós-Graduação em Biologia Animal, Universidade Estadual Paulista “Júlio de Mesquita Filho”, São José do Rio Preto, SP, Brazil; Laboratory of Multitrophic Interactions and Biodiversity (LIMBIO), Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil; Microbial Resources Division, Research Center for Chemistry, Biology and Agriculture (CPQBA), University of Campinas (UNICAMP), Campinas, Brazil; Brazilian Research Network on Climate Change (Rede Clima), São Paulo, Brazil
Recommended Citation:
Bernabé T.N.,de Omena P.M.,Santos V.P.D.,et al. Warming weakens facilitative interactions between decomposers and detritivores, and modifies freshwater ecosystem functioning[J]. Global Change Biology,2018-01-01,24(7)