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Rights Statements InC/1.0 , Open Access
Journal article
Preliminary observations on movements of tailed frog tadpoles (Ascaphus truei) in streams through harvested and natural forests
Northwest science., Vol.75(1), pp.77-83
2001
Handle:
https://hdl.handle.net/2376/1001
Abstract
The tailed frog (Ascaphus truei) is designated a species 'at risk' or 'of special concern' in California, Oregon, Washington (USA), and British Columbia (Canada). Forest practices often have negative impacts on Ascaphus adults and larvae, including absence from some clear felled areas. Recolonization of logged sites may be critical to sustaining productive amphibian populations. Given the uncommonly long larval stage of Ascaphus, movements by larvae may be particularly important in the recolonization of managed forests. We investigated movement rates of Ascaphus larvae and the influence of stream parameters in four stream basins (Ashlu, Elaho, Squamish and Mamquam) transecting recently harvested and unmanaged forests in southwestern British Columbia (1995, 1996 and 1999). Larvae in streams flowing through unmanaged forests moved about 7.4 times as far as those flowing through clear felled reaches. Streams with high levels of logjams showed low larval movement rates. Recently harvested sites may produce unfavourable conditions impeding recolonization by Ascaphus larvae. High gradient streams also showed low larval movement rates. The role of stream-dwelling larvae in dispersal of Ascaphus is unknown, but this disperal mechanism would be energy-efficient because it can be passive with the stream current.
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Details
- Title
- Preliminary observations on movements of tailed frog tadpoles (Ascaphus truei) in streams through harvested and natural forests
- Creators
- Tanya R. Wahbe (Author)Fred L. Bunnell (Author)
- Publication Details
- Northwest science., Vol.75(1), pp.77-83
- Academic Unit
- Northwest Science
- Publisher
- WSU Press
- Identifiers
- 99900501707401842
- Copyright
- In copyright ; openAccess ; http://rightsstatements.org/vocab/InC/1.0/ ; http://purl.org/eprint/accessRights/OpenAccess
- Language
- English
- Resource Type
- Journal article