DOI: 10.3354/cr01434
Scopus记录号: 2-s2.0-85020480156
论文题名: Assessing freshwater life-stage vulnerability of an endangered Chinook salmon population to climate change influences on stream habitat
作者: Honea J.M. ; McClure M.M. ; Jorgensen J.C. ; Scheuerell M.D.
刊名: Climate Research
ISSN: 0936577X
出版年: 2016
卷: 71, 期: 2 起始页码: 127
结束页码: 137
语种: 英语
英文关键词: Downscale
; Hydrology model
; Landscape model
; Life-cycle model
Scopus关键词: air temperature
; climate change
; climate effect
; downscaling
; endangered species
; freshwater environment
; global climate
; habitat restoration
; hydrological modeling
; incubation
; landscape ecology
; life cycle analysis
; salmonid
; vulnerability
; water temperature
; Oncorhynchus tshawytscha
英文摘要: We linked a set of climate, hydrology, landscape, and fish population models to estimate the relative influence of freshwater habitat variables on the abundance of a population of endangered stream-type Chinook salmon Oncorhynchus tshawytscha responding to a warming climate. The hydrology models estimated that increases in annual air temperature and winter precipitation would lead to increases in water temperature and changes in discharge, including higher flows during the egg-incubation period and lower flows during the summer rearing period. The spatially explicit population model estimated a resulting decline of 0 to 7% in the number of spawners, with 3 of 4 global climate models estimating a decline of 4 to 7%. Increased water temperature during the summer spawning period was the most limiting among habitat variables modeled, but our modeling suggested that aggressive habitat restoration (increasing forested area and reducing impervious area) could mitigate some spawner abundance reductions. Better knowledge of the links between climate changes and habitat response, including increased streambed scour due to the larger and more frequent winter high-discharge events predicted by our hydrology models, would improve our ability to estimate climate effects on populations. Future limitation by elevated summer water temperature, and potentially egg-pocket scour, would further stress an endangered population currently limited by the percentage of fine sediment around egg pockets. Identifying such changes demonstrates the utility of models that consider climate and integrate life-stage-specific habitat influences over a species' life cycle, thereby indicating restoration actions with the potential to benefit sensitive life stages. © The authors 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116354
Appears in Collections: 气候减缓与适应
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Recommended Citation:
Honea J.M.,McClure M.M.,Jorgensen J.C.,et al. Assessing freshwater life-stage vulnerability of an endangered Chinook salmon population to climate change influences on stream habitat[J]. Climate Research,2016-01-01,71(2)