globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13699
论文题名:
Boosted food web productivity through ocean acidification collapses under warming
作者: Goldenberg S.U.; Nagelkerken I.; Ferreira C.M.; Ullah H.; Connell S.D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:10
起始页码: 4177
结束页码: 4184
语种: 英语
英文关键词: climate change ; CO2 enrichment ; direct and indirect effect ; mesocosm ; ocean acidification ; predator–prey ; species interaction ; trophic compensation
Scopus关键词: algae ; Invertebrata
英文摘要: Future climate is forecast to drive bottom-up (resource driven) and top-down (consumer driven) change to food web dynamics and community structure. Yet, our predictive understanding of these changes is hampered by an over-reliance on simplified laboratory systems centred on single trophic levels. Using a large mesocosm experiment, we reveal how future ocean acidification and warming modify trophic linkages across a three-level food web: that is, primary (algae), secondary (herbivorous invertebrates) and tertiary (predatory fish) producers. Both elevated CO2 and elevated temperature boosted primary production. Under elevated CO2, the enhanced bottom-up forcing propagated through all trophic levels. Elevated temperature, however, negated the benefits of elevated CO2 by stalling secondary production. This imbalance caused secondary producer populations to decline as elevated temperature drove predators to consume their prey more rapidly in the face of higher metabolic demand. Our findings demonstrate how anthropogenic CO2 can function as a resource that boosts productivity throughout food webs, and how warming can reverse this effect by acting as a stressor to trophic interactions. Understanding the shifting balance between the propagation of resource enrichment and its consumption across trophic levels provides a predictive understanding of future dynamics of stability and collapse in food webs and fisheries production. © 2017 John Wiley & Sons Ltd
资助项目: We thank W. Hutchinson and M. Gluis for technical advice, all the students helping with construction and maintenance of the mesocosms, T. Kildea for providing local temperature data and three anonymous reviewers for their constructive comments on the manuscript. Organism symbols were either drawn by S.U.G. or modified from Courtesy of the Integration and Application Network, University of Maryland Center for Environmental Science (ian.umces.edu/symbols/). This study was financially supported by an Australian Research Council Future Fellowship Grant to I.N. (FT120100183) and S.D.C. (FT0991953) and by a grant from the Environment Institute (the University of Adelaide). C.M.F. was supported by a Science Without Borders PhD scholarship through CAPES (Coordination for the Improvement of Higher Education Personnel) Brazil (scholarship no. 13058134).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60798
Appears in Collections:影响、适应和脆弱性

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作者单位: Southern Seas Ecology Laboratories, School of Biological Sciences & The Environment Institute, The University of Adelaide, Adelaide, SA, Australia

Recommended Citation:
Goldenberg S.U.,Nagelkerken I.,Ferreira C.M.,et al. Boosted food web productivity through ocean acidification collapses under warming[J]. Global Change Biology,2017-01-01,23(10)
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