Source:Idaho Department of Fish and Game, Idaho Conservation Data Center; The Nature Conservancy, Boise, ID, p.18 (1994)
Keywords:Deer Mouse, dusky shrew, heather vole, long-tailed vole, Long-toed Salamander, meadow vole, northern bog lemming, Northern Pocket Gopher, pygmy shrew, SWAP, vagrant shrew, water shrew masked shrew
Small mammals and amphibian abundance and species richness were estimated on pitfall trapping grids with drift fences at 15 sites representing five replicates of three treatments. The three treatments were old-growth cedar-hemlock stands, second-growth stands, and recent clearcuts. Vegetation was also sampled at each site on Forest Service ECODATA plots. Most sampling sites were classified as western hemlock-queencup beadlily habitat types. Old-growth sites had the largest trees and the greatest canopy cover by trees, shrub cover was greatest in second-growth sites, and forb cover was greatest on clearcuts. A total of 12 small mammal species (five shrews, one pocket gopher, six of mice and voles) and three amphibian species was captured on the 15 sampling sites over a 3-year period. Masked and vagrant shrews were the most commonly captured small mammals. Species richness but not species composition was similar across the three treatments. The greatest total number of small mammals was captured on clearcut sites, followed by second-growth and old-growth sites. Two species of rare, threatened, or endangered small mammals were captured: the pygmy shrew and the northern bog lemming. Pygmy shrews were captured on second-growth and old-growth sites; the northern bog lemming was found primarily on second-growth sites. Old-growth sites had the greatest number of amphibians captured, but species richness and abundance of amphibians were relatively low on all sites. Results presented in this paper are preliminary in that they provide a summary but not analysis of the field data that were collected. A later report will contain statistical analyses, a more thorough discussion of the relevant literature on habitat relations of small mammals and amphibians, and a discussion of the effects of timber harvest on small mammals and amphibian populations.
ELECTRONIC FILE - Zoology: Multiple Species
SWAP (2/19/2016) citation:
Groves CR. 1994. Effects of timber harvest on small mammals and amphibians inhabiting old-growth coniferous forests on the Priest Lake Ranger District, Idaho Panhandle National Forests. Boise (ID): Idaho Department of Fish and Game. 18 p. [accessed 2016 Feb 2]. https://fishandgame.idaho.gov/ifwis/idnhp/cdc_pdf/U94GRO02.pdf