The Effects of Forest Clearcut Harvesting and Thinning on Terrestrial Salamanders
| Autor: | S. D. West, J. A. Grialou, R. N. Wilkins |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Salamandridae
education.field_of_study Ecology biology Ambystoma gracile Population Rhyacotriton kezeri biology.organism_classification Plethodon vehiculum biology.animal General Earth and Planetary Sciences Salamander Dicamptodon tenebrosus education Ecology Evolution Behavior and Systematics Nature and Landscape Conservation General Environmental Science Caudata |
| Zdroj: | The Journal of Wildlife Management. 64:105 |
| ISSN: | 0022-541X |
| DOI: | 10.2307/3802979 |
| Popis: | We studied short-term effects of forest clearcut harvesting and thinning on species presence, abundance, and demographies of terrestrial salamanders in an area intensively managed for forest products in Southwestern Washington. We used pitfall traps to sample 4 previously harvested 45-60-year-old forested areas and 1 adjacent areas clearent 2-5 years previously. In a separate experiment, we conducted surveys before and alter thinning on 1 control and 4 treatment sites. Western red-backed salamanders (Plethodon vehiculum), usatunas (Ensatina eschscholtzlii), northwestern salamanders (Ambystoma gracile), rough-skinned newts (Tacthat granulosa), and Dunu's salamanders (Plethodon duma) were captured in both forested and clearcut areas, Colnalsia torrent salamanders (Rhyacotriton kezeri) and Pacific giant salamanders (Dicamptodon tenebrosus) were captured only in forested areas. Capture rates of red-backed salamanders were greater in forested than clearcut areas in fall 1994-and 1995). The size-class distribution of red-backed salamanders was skewed toward the smaller size classes in clearcut areas in fall 1994 but not fall 1995. Ensalina showed no difference in capture are or size-class distribution between forested and clearcut areas in fall 1994, but showed a reduced rate of cpture in clearent areas relative to forested areas in fall 1995. Gravid females were present in both clearcut and torested areas for western red-backed salamanders and ensalinas. Although species presence was unaffected la thinning, western red-backed salamander capture rates on treatment sites were reduced after thinning Population responses of salamander species to forest management are variable, with some species declining in abundance after clearcutting and thinning. |
| Databáze: | OpenAIRE |
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