Abstracts » Zoology and wildlife conservation

Ecological scale and forest development: squirrels, dietary fungi, and vascular plants in managed and unmanaged forests

Article Abstract:

Research focusing on northern flying squirrels and Townsend's chipmunk in a cross-sectional survey of managed and unmanaged forest areas in southwestern Oregon has identified low correlations between squirrels and habitat variables within stands. Canopy stratification was found to be the single best descriptor of the realized habitat of chipmunks, with midstory cover having the most predictive power for chipmunk activity. Coarse, woody debris was identified as the best predictor of the realized habitat space, carrying capacity and activity for northern flying squirrels and carrying capacity for Townsend's chipmunk.

Chipmunks

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Dens of northern flying squirrels in the Pacific Northwest

Article Abstract:

Researchers used radio-telemetry over nine years from 1986 to discover the den choices of flying squirrels. Twenty-six forest sites in the Pacific Northwest yielded 604 den sites. The dens were located in cavities of live and dead trees, in tree stumps, and there were both moss and stick nests in small trees. Female den sites were approximately 108 meters apart and females chose cavities for rearing their young. Male dens were an average of 211 meters apart and, like non-maternal female dens, frequently had multiple occupancy. The flying squirrels used over two dens per month.

Observations, Natural history, Pacific Northwest

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Induced spatial heterogeneity in forest canopies: responses of small mammals

Article Abstract:

The article examines the impact of variable canopy tree densities on small mammal biodiversity in Pacific Northwest Douglas-fir forests. Findings show that, when coupled with legacy retention and long rotations, thinning canopy trees to produce different densities promotes species diversity.

Pacific States, Statistical Data Included, Methods, Environmental aspects, Pacific States (United States), Biological diversity, Biodiversity, Forest management, Wildlife habitat improvement, Forest ecology

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