globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13972
Scopus记录号: 2-s2.0-85041358464
论文题名:
Dry and wet periods drive rapid shifts in community assembly in an estuarine ecosystem
作者: Chang A.L.; Brown C.W.; Crooks J.A.; Ruiz G.M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期:2
起始页码: e627
结束页码: e642
语种: 英语
英文关键词: climate change ; community assembly ; disturbance ; droughts ; estuaries ; extreme events ; salinity ; storms
Scopus关键词: climate change ; climate effect ; community composition ; community dynamics ; drought ; environmental disturbance ; estuarine ecosystem ; extreme event ; salinity ; storm ; California ; San Francisco Bay ; United States ; Invertebrata
英文摘要: The impacts of changing climate regimes on emergent processes controlling the assembly of ecological communities remain poorly understood. Human alterations to the water cycle in the western United States have resulted in greater interannual variability and more frequent and severe extremes in freshwater flow. The specific mechanisms through which such extremes and climate regime shifts may alter ecological communities have rarely been demonstrated, and baseline information on current impacts of environmental variation is widely lacking for many habitats and communities. Here, we used observations and experiments to show that interannual variation in winter salinity levels in San Francisco Bay controls the mechanisms determining sessile invertebrate community composition during the following summer. We found consistent community changes in response to decadal-scale dry and wet extremes during a 13-year period, producing strikingly different communities. Our results match theoretical predictions of major shifts in species composition in response to environmental forcing up to a threshold, beyond which we observed mass mortality and wholesale replacement of the former community. These results provide a window into potential future community changes, with environmental forcing altering communities by shifting the relative influences of the mechanisms controlling species distributions and abundances. We place these results in the context of historical and projected future environmental variation in the San Francisco Bay Estuary. © 2017 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/110527
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: Smithsonian Environmental Research Center, Tiburon, CA, United States; Smithsonian Environmental Research Center, Edgewater, MD, United States; California State University Maritime Academy, Vallejo, CA, United States; Tijuana River National Estuarine Research Reserve, Imperial Beach, CA, United States

Recommended Citation:
Chang A.L.,Brown C.W.,Crooks J.A.,et al. Dry and wet periods drive rapid shifts in community assembly in an estuarine ecosystem[J]. Global Change Biology,2018-01-01,24(2)
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