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Home A GIS Model for Identifying Eastern Spadefoot Toad Habitat in Eastern Connecticut

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A GIS Model for Identifying Eastern Spadefoot Toad Habitat in Eastern Connecticut

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Identifier	Thesis 2011
Author	Moran, M. Katherine
Title	A GIS Model for Identifying Eastern Spadefoot Toad Habitat in Eastern Connecticut
Publisher	Central Connecticut State University
Date	2009
Resource Type	Master's Thesis
Notes	The eastern spadefoot toad (Scaphiopus holbrookii) is listed endangered in Connecticut having only one viable population in the state. Efforts to understand their distribution in Connecticut are frustrated by both their rarity, and their nocturnal and fossorial habits. The purpose of this study is to develop a GIS model for identifying eastern spadefoot toad habitat in eastern Connecticut. Existing spadefoot toad sites in Connecticut, Massachusetts, and Rhode Island served to establish selection criteria for the model. Drainage class, texture class and deposit type of soils within 250 meters of each site were summarized by acreage to reveal the dominant conditions of the substrate at each site. Using digital elevation models (DEMs), relative elevation was calculated for each site, expressing the absolute elevation as a percentage of the range of elevations in the surrounding landscape. Two tiers of selection criteria were established for these soil properties and for relative elevation. Applying the selection criteria in eastern Connecticut resulted in two GIS shapefiles (tier 1 & 2) of predicted spadefoot toad habitat. The predicted habitat was compared to the locations of spadefoot toad observations made in an independent telemetry study conducted by the Connecticut Department of Environmental Protection (CT DEP) in 2008. Seven toads were recorded at 27 locations; 26 fell within tier 1 habitat while one came within a few meters of it. The discovery of one toad on a road (not formally part of the CT DEP study) was made within 75 meters of tier 1 habitat. No spadefoot toads were found in tier 2 habitat. These initial results suggest that the tier 1 habitat model accurately identified eastern spadefoot toad habitat in eastern Connecticut.
Subject	Eastern spadefoot -- Habitat -- Connecticut Toads -- Habitat -- Connecticut
Department	Department of Geography
Advisor	Button, Charles E.
Type	Text
Digital Format	application/pdf
Language	eng
OCLC number	713733921
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A GIS Model for Identifying Eastern Spadefoot Toad Habitat in Eastern Connecticut

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