Potential Consequences of Climate Change to Persistence of Cutthroat Trout Populations

Autor:	Helen M. Neville, Amy L. Haak, Jack E. Williams, Warren T. Colyer
Rok vydání:	2009
Předmět:	education.field_of_study Ecology biology Population Climate change Management Monitoring Policy and Law Aquatic Science Subspecies biology.organism_classification Persistence (computer science) Trout Habitat Stream flow Oncorhynchus education Ecology Evolution Behavior and Systematics
Zdroj:	North American Journal of Fisheries Management. 29:533-548
ISSN:	1548-8675 0275-5947
DOI:	10.1577/m08-072.1
Popis:	Warmer water, changes in stream flow, and the increasing frequency and intensity of other disturbances are among the factors associated with climate change that are likely to impact native trout populations in the western USA. We examined how three of these factors—increased summer temperatures, uncharacteristic winter flooding, and increased wildfires—are likely to affect broad-scale population persistence among three subspecies of cutthroat trout Oncorhynchus clarkii. Our results suggest that as much as 73% of the habitat currently occupied by Bonneville cutthroat trout O. c. utah, 65% of that occupied by westslope cutthroat trout O. c. lewisi, and 29% of that occupied by Colorado River cutthroat trout O. c. pleuriticus will be at high risk from one or more of the these three factors. Within the next 50 years, wildfire, floods, and other disturbances may have a greater impact on population persistence than increasing water temperature alone. Our results also suggest that the risk will vary subs...
Databáze:	OpenAIRE
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