Association of Wetland Area with Breeding Activity for Multiple Amphibian Species

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Authors
Laselle, Brooks
Advisor
Grant Hokit
Jack Oberweiser
Joan Stottlemyer
Editor
Date of Issue
2000-04-01
Subject Keywords
Ambystoma macrodactylum, long-toed salamander, Bufo boreas, Western toad, Rana luteiventris, spotted frog, habitat, Montana
Publisher
Citation
Series/Report No.
item.page.identifier
Title
Association of Wetland Area with Breeding Activity for Multiple Amphibian Species
Other Titles
Type
thesis
Description
Abstract
The populations of many amphibian species appear to be in decline. The loss of amphibians contributes to the overall loss of biodiversity that is occurring on a global scale. Amphibians are well-known bioindicators and can perhaps aid in # pinpointing factors responsible for the loss of biodiversity. Habitat patch size is a crucial variable to species persistence. I examined the relationship between wetland area and population occupancy for three amphibian species of the Western Montana Rockies: Ambystoma macrodactylum (long-toed salamander), Bufo boreas (Western toad), and Rana luteiventris (spotted frog). A logistic regression analysis revealed significant associations between increasing wetland area and breeding activity for spotted frogs and long-toed salamanders. I observed a threshold wetland area required to sustain breeding populations, and suggest that this minimum area is essential for amphibian persistence. Although a significant association was not observed for Western toads, this absence was most likely due to small sample size.
Sponsors
Degree Awarded
Bachelor's
Semester
Spring
Department
Life & Environmental Sciences