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  • The value of stormwater wetlands for supporting multiple life-history stages of the wood frog (Lithobates sylvaticus) in the City of Edmonton, Alberta, Canada
  • Scheffers, Brett
  • en_US
  • stormwater
    life-history stage
  • Jul 21, 2010 9:22 PM
  • Thesis
  • en_US
  • Adobe PDF
  • 1442686 bytes
  • I reviewed 32 urban amphibian studies from North America and found most amphibians respond negatively to urbanization (69 negative responses, 6 positive and 35 no effect). Additionally, I conducted amphibian surveys (adult, egg, larvae, and metamorphs) at 75 wetlands located throughout the City of Edmonton, Alberta, Canada, with a focus on the wood frog (Lithobates sylvaticus). Wetlands consisted of natural river valley and upland sites, and constructed stormwater wetlands. Breeding male wood frogs occured at 50% of stormwater wetlands versus 93% of natural wetlands. The presence of breeding males was best predicted by the proportion of native vegetation within 100 m of a wetland. Wood frogs successfullly reproduced on stormwater wetlands but relative abundances of eggs, tadpoles and metamorphs were lower than at natural sites. However, stormwater metamorphs were significantly larger which may contribute to higher survivorship and subsequent reproductive success. Stormwater wetlands are required to control flooding and run-off, therefore, future amphibian conservation efforts should focus on preserving native terrestrial habitat surrounding urban wetlands.
  • Master's
  • Master of Science
  • Department of Biological Sciences
  • Fall 2010
  • Paszkowski, Cynthia (Biological Sciences)
  • Bayley, Suzanne (Biological Sciences)
    Hood, Glynnis (Environmental Science and Studies, University of Alberta, Augustana)


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