Potential future climate effects on mountain hydrology, stream temperature, and native salmonid life history
Potential future climate effects on mountain hydrology, stream temperature, and native salmonid life history
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未来气候对山区水文、溪流温度和本地鲑鱼生活史的潜在影响
DOI：
10.1139/cjfas-2013-0221
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发表时间：
2014
影响因子：
2.4
通讯作者：
Joseph B. Rasmussen
中科院分区：
文献类型：
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作者：
Ryan J. MacDonald;Sarah Boon;James M. Byrne;Mike D. Robinson;Joseph B. Rasmussen
北美西部的原生鲑鱼受到许多环境压力，最明显的是引进物种和环境退化的影响。为了更好地了解加拿大落基山脉东坡的原生鲑鱼如何应对未来的气候变化，我们采用了基于过程的方法进行水文和流温建模。这项研究表明，加拿大阿尔伯塔省西部的溪流热状况可能只在夏季变暖，而春季、秋季和冬季较冷的热状况可能是对春季山洪提前到来的反应造成的。水文和流温度的未来气候影响的模型结果证实了流域间的流温度，气温和水文条件的比较。早期鱼苗出现的结果改变水文和热制度可能有利于本地西坡切喉鳟鱼（Oncorhynchus clarkii lewisii）在孤立的源头流。寒冷的冬天
Native salmonids of western North America are subject to many environmental pressures, most notably the effects of introduced species and environmental degradation. To better understand how native salmonids on the eastern slopes of the Canadian Rocky Mountains may respond to future changes in climate, we applied a process-based approach to hydrologic and stream temperature modelling. This study demonstrates that stream thermal regimes in western Alberta, Canada, may only warm during the summer period, while colder thermal regimes during spring, fall, and winter could result from response to earlier onset of spring freshet. Model results of future climate impacts on hydrology and stream temperature are corroborated by an intercatchment comparison of stream temperature, air temperature, and hydrological conditions. Earlier fry emergence as a result of altered hydrological and thermal regimes may favour native westslope cutthroat trout (Oncorhynchus clarkii lewisii) in isolated headwater streams. Colder wint...