Effects of Wildfire and Subsequent Hydrologic Events on Fish Distribution and Abundance in Tributaries of North Fork John Day River

Autor:	Philip J. Howell
Rok vydání:	2006
Předmět:	Fish migration geography geography.geographical_feature_category Ecology Endangered species Drainage basin Storm STREAMS Management Monitoring Policy and Law Aquatic Science Debris Fishery Abundance (ecology) Tributary Environmental science Ecology Evolution Behavior and Systematics
Zdroj:	North American Journal of Fisheries Management. 26:983-994
ISSN:	1548-8675 0275-5947
DOI:	10.1577/m05-114.1
Popis:	Recent large wildfires in western states have fueled increasing concerns of resource managers and the public about the effects of fire, including risks to fish, particularly endangered species. However, there are few empirical studies on the response of fish to fire and none that include anadromous species. The Tower Fire was one of four large fires in the upper John Day River basin in Oregon in 1996. Much of the area burned at moderate to high severity, consistent with the pattern of increasing fire severity and size projected for the region. Intense spring storms in 1997 and 1998 triggered large floods, landslides, and debris torrents that affected streams within and downstream of the fire. We investigated the effects of the fire and ensuing floods on fish distribution and abundance in three streams immediately after the fire through 2003. Immediately after the fire, no fish were found in moderate- and high-intensity burn areas. Fish began to repopulate defaunated reaches the year after the fir...
Databáze:	OpenAIRE
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