期刊
SCIENCE ADVANCES
卷 7, 期 52, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abj5471
关键词
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资金
- U.S. Geological Survey (USGS) Northwest Climate Adaptation Science Center
- USGS National Climate Adaptation Center
This study found that climate change has negative impacts on the distributions of native and invasive trout species in the northern Rocky Mountains of the USA. The occupancy rates of bull trout and cutthroat trout decreased over time, with different reasons behind these declines, requiring species-specific management actions.
Climate change and invasive species are major threats to native biodiversity, but few empirical studies have examined their combined effects at large spatial and temporal scales. Using 21,917 surveys collected over 30 years, we quantified the impacts of climate change on the past and future distributions of five interacting native and invasive trout species throughout the northern Rocky Mountains, USA. We found that the occupancy of native bull trout and cutthroat trout declined by 18 and 6%, respectively (1993-2018), and was predicted to decrease by an additional 39 and 16% by 2080. However, reasons for these occupancy reductions markedly differed among species: Climate-driven increases in water temperature and decreases in summer flow likely caused declines of bull trout, while climate-induced expansion of invasive species largely drove declines of cutthroat trout. Our results demonstrate that climate change can affect ecologically similar, co-occurring native species through distinct pathways, necessitating species-specific management actions.
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