scholarly journals Elevated Genetic Structure in the Coastal Tailed Frog (Ascaphus truei) in Managed Redwood Forests

2013 ◽  
Vol 104 (2) ◽  
pp. 202-216 ◽  
Author(s):  
Andres Aguilar ◽  
Robert B. Douglas ◽  
Eric Gordon ◽  
Jason Baumsteiger ◽  
Matthew O. Goldsworthy
Keyword(s):  
Genetic Structure ◽  
Ascaphus Truei ◽  
Redwood Forests

Population genetic structure of tailed frogs (Ascaphus truei) in clearcut and old-growth stream habitats in south coastal British Columbia

2005 ◽  
Vol 83 (11) ◽  
pp. 1460-1468 ◽  
Author(s):  
T R Wahbe ◽  
C Ritland ◽  
F L Bunnell ◽  
K Ritland
Keyword(s):  
British Columbia ◽  
Genetic Structure ◽  
Population Genetic ◽  
Isolation By Distance ◽  
Physical Distance ◽  
Future Research ◽  
Ecological Data ◽  
Old Growth ◽  
Ascaphus Truei ◽  
Coastal British Columbia

Ascaphus truei Stejneger, 1899 relies on cool, fast-flowing, forested mountain streams, which receive little protection from logging activities. During recovery of post-logging habitats, local extirpation of Ascaphus is a concern because their recolonization may be slow. In British Columbia, Oregon, and California, coastal Ascaphus populations are designated as "at risk". To infer fragmentation impacts from patterns of genetic structure, we used RAPD molecular markers and compared population genetic structures of Ascaphus larvae in an old growth with an adjacent clearcut stream located in coastal British Columbia. In the clearcut, larvae were less genetically diverse than in the old growth and exhibited no relationship between physical distance and genetic relatedness, whereas in the old growth, genetic similarity decreased with physical distance. Patterns of gene flow between the clearcut and old-growth streams were significantly different. The clearcut population went through a bottleneck/founding event, but also exhibited greater dispersal. The frogs were perhaps searching for new habitat (which would lower isolation by distance) and suffering mortality (which would decrease diversity). Most problems in conservation will require genetic and ecological data, and future research should aim to incorporate methodologies from both fields.

Sign in / Sign up

Export Citation Format

Share Document