Stream Salamander Species Richness and Abundance
in Relation to Environmental Factors in Shenandoah National Park, Virginia
Evan H. Campbell Grant and Robin E. Jung, USGS
Patuxent Wildlife Research Center, 12100 Beech Forest Road, Laurel, MD 20078
and Karen C. Rice,
U.S. Geological Survey, P.O. Box B, Charlottesville, VA 22903
Stream salamanders are sensitive to acid mine
drainage and may be sensitive to acidification and low acid neutralizing
capacity (ANC) of a watershed. Streams
in
Shenandoah National Park
,
Virginia
, are subject to episodic acidification from precipitation events.
We surveyed 25 m by 2 m transects located on the stream bank adjacent to
the water channel in Shenandoah National Park for salamanders using a stratified
random sampling design based on elevation, aspect and bedrock geology.
We investigated the relationships of four species (Eurycea bislineata, Desmognathus
fuscus, D. monticola and Gyrinophilus
poryphyriticus) to habitat and water quality variables.
We did not find overwhelming evidence that stream salamanders are
affected by the acid-base status of streams in
Shenandoah
National Park
. Desmognathus
fuscus and D. monticola abundance
was greater both in streams that had a higher potential to neutralize
acidification, and in higher elevation (>700 m) streams.
Neither abundance of E. bislineata
nor species richness were related to any of the habitat variables.
Our sampling method preferentially detected the adult age class of the
study species and did not allow us to estimate population sizes.
We suggest that continued monitoring of stream salamander populations in
SNP will determine the effects of stream acidification of these taxa.
Grant, E.H.C., Jung, R.E., and Rice, K.C., 2005, Stream salamander species
richness and abundance in relation to environmental factors in Shenandoah
National Park, Virginia: American Midland Naturalist, v. 153, p. 348-356.
[Abstract]
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