USDA Forest Service
 

Pacific Southwest Research Station

 

Pacific Southwest Research Station
800 Buchanan Street
West Annex Building
Albany, CA 94710-0011

(510) 559-6300

United States Department of Agriculture Forest Service. USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.

Research Topics Wildlife and Fish: Herpetology

High Lakes -
Amphibian Assemblages and Introduced Fishes in the Wilderness Areas of the Klamath-Siskiyou Bioregion

High Lake We are assessing the effects of introduced fish on the distribution and abundance of amphibians in the U.S. Forest Service wilderness areas of Northern California. We are also quantifying the current distributions and habitat associations of fish and amphibians in these high elevation regions.

Long-toed Salamander Cascades Frog The alpine and subalpine lentic habitats of northern California support a diverse assemblage of amphibian species including the long-toed salamander and Cascades frog (California species of special concern).

As of the fall of 2001, we sampled 695 aquatic habitats in the Trinity Alps, Marble Mountains and Russian Wilderness. We detected long-toed salamanders at only 40 sites and Cascades frogs at 154 sites.

Andie working net We used gill nets to assess presence, species and density of fish in the lakes. Of water bodies greater than two meters deep, fish were detected in 80 % of the lakes in the Trinity Alps, 90 % in the Marble Mountains and 100 % in the Russian Wilderness. Because trout have been stocked extensively in lake habitats throughout northern California, little of this habitat remains for native amphibians.

Data from the Trinity Alps, Marble Mountains and Russian Wilderness show a significant negative effect of fish on both long-toed salamanders and Cascades frogs.

Fairy Shrimp During our extensive surveys of subalpine and alpine aquatic habitats, we are also collecting data on the distribution and range of several species of fairy shrimp and other aquatic invertebrate species.

2002 Crew In 2002, we will complete surveys in the Yolla Bolly, Red Butte, Thousand Lakes, Caribou, Castle Crags and Siskiyou  wildernesses.

 

Publications:

Welsh, H. H., Jr., K. L. Pope, and D. Boiano. 2006. Sub-alpine amphibian distributions related to species palatability to non-native salmonids in the Klamath mountains of northern California. Diversity and Distributions 12: 298-309.

Research contact:
Last Modified: Mar 28, 2013 03:37:18 PM