globalchange  > 气候变化与战略
DOI: 10.1111/gcb.14944
论文题名:
Climate change undermines the global functioning of marine food webs
作者: du Pontavice H.; Gascuel D.; Reygondeau G.; Maureaud A.; Cheung W.W.L.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2020
卷: 26, 期:3
语种: 英语
英文关键词: biomass flow ; biomass residence time ; climate change ; ecosystem modelling ; marine food web ; species assemblage ; trophic ecology ; trophic transfer efficiency
Scopus关键词: climate change ; efficiency measurement ; food web ; global change ; marine ecosystem ; numerical model ; parameter estimation ; seawater ; water temperature
英文摘要: Sea water temperature affects all biological and ecological processes that ultimately impact ecosystem functioning. In this study, we examine the influence of temperature on global biomass transfers from marine secondary production to fish stocks. By combining fisheries catches in all coastal ocean areas and life-history traits of exploited marine species, we provide global estimates of two trophic transfer parameters which determine biomass flows in coastal marine food web: the trophic transfer efficiency (TTE) and the biomass residence time (BRT) in the food web. We find that biomass transfers in tropical ecosystems are less efficient and faster than in areas with cooler waters. In contrast, biomass transfers through the food web became faster and more efficient between 1950 and 2010. Using simulated changes in sea water temperature from three Earth system models, we project that the mean TTE in coastal waters would decrease from 7.7% to 7.2% between 2010 and 2100 under the ‘no effective mitigation’ representative concentration pathway (RCP8.5), while BRT between trophic levels 2 and 4 is projected to decrease from 2.7 to 2.3 years on average. Beyond the global trends, we show that the TTEs and BRTs may vary substantially among ecosystem types and that the polar ecosystems may be the most impacted ecosystems. The detected and projected changes in mean TTE and BRT will undermine food web functioning. Our study provides quantitative understanding of temperature effects on trophodynamic of marine ecosystems under climate change. © 2019 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158760
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作者单位: Agrocampus Ouest, Ecology and Ecosystem Health Research Unit, Rennes, France; Changing Ocean Research Unit, Nippon Foundation-Nereus Program, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC, Canada; Changing Ocean Research Unit, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC, Canada; Department of Ecology and Evolutionary Biology Max Planck, Yale Center for Biodiversity Movement and Global Change, Yale University, New Haven, CT, United States; Centre for Ocean Life, National Institute of Aquatic Resources (DTU Aqua), Technical University of Denmark, Kgs. Lyngby, Denmark

Recommended Citation:
du Pontavice H.,Gascuel D.,Reygondeau G.,et al. Climate change undermines the global functioning of marine food webs[J]. Global Change Biology,2020-01-01,26(3)
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