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Consequences of climatic change for water temperature and brown trout populations in Alpine rivers and streams

Hari, R. E. and Livingstone, D. M. and Siber, R. and Burkhardt-Holm, P. and Güttinger, H.. (2006) Consequences of climatic change for water temperature and brown trout populations in Alpine rivers and streams. Global Change Biology, 12 (1). pp. 10-26.

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Official URL: http://edoc.unibas.ch/52965/

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Abstract

Twenty-five years of extensive water temperature data show regionally coherent warming to have occurred in Alpine rivers and streams at all altitudes, reflecting changes in regional air temperature . Much of this warming occurred abruptly in 1987/1988. For brown trout populations , the warming resulted in an upward shift in thermal habitat that was accelerated by an increase in the incidence of temperature -dependent Proliferative Kidney Disease at the habitat's lower boundary. Because physical barriers restrict longitudinal migration in mountain regions, an upward habitat shift in effect implies habitat reduction, suggesting the likelihood of an overall population decrease. Extensive brown trout catch data documenting an altitudinally dependent decline indicate that such a climate-related population decrease has in fact occurred. Our analysis employs a quantitatively defined reference optimum temperature range for brown trout , based on the sinusoidal regression of seasonally varying field data.
Faculties and Departments:05 Faculty of Science
UniBasel Contributors:Holm, Patricia
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Wiley-Blackwell
ISSN:1354-1013
e-ISSN:1365-2486
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:12 Dec 2017 10:34
Deposited On:12 Dec 2017 10:34

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