Results 1 -
8 of
8
Accepted for the Council:
, 2009
"... Morphological convergence and character displacement in two species of polymorphic salamanders (genus Plethodon) in eastern Tennessee ..."
Abstract
- Add to MetaCart
Morphological convergence and character displacement in two species of polymorphic salamanders (genus Plethodon) in eastern Tennessee
Contents lists available at ScienceDirect Ecological Indicators
"... journal homepage: www.elsevier.com/locate/ecolind Environmental indicators of macroinvertebrate and fish assemblage integrity ..."
Abstract
- Add to MetaCart
(Show Context)
journal homepage: www.elsevier.com/locate/ecolind Environmental indicators of macroinvertebrate and fish assemblage integrity
TABLE OF CONTENTS
, 2007
"... SOUTH CAROLINA S. C. STATE L1BRAR~ tAUS 2 2007 scam \,fSSTATE DOCUMENTS South Carolina \Adatioo Ertatallrt ..."
Abstract
- Add to MetaCart
(Show Context)
SOUTH CAROLINA S. C. STATE L1BRAR~ tAUS 2 2007 scam \,fSSTATE DOCUMENTS South Carolina \Adatioo Ertatallrt
rte Ecological Indicators xxx (2009) xxx–xxx G Model ECOIND-493; No of Pages 12 Contents lists available at ScienceDirect
"... ..."
(Show Context)
ABSTRACT Title of document: INTERREGIONAL DIFFERENCES IN STREAM ECOSYSTEM RESPONSES TO URBANIZATION: CAUSES AND CONSEQUENCES
"... Stream ecosystems are profoundly degraded by watershed urbanization. Hydrologic, geomorphic, chemical and thermal adjustment following urban development contributes to substantial biodiversity loss in impacted streams. However, the extent of degradation along an urban gradient may not be uniform amo ..."
Abstract
- Add to MetaCart
Stream ecosystems are profoundly degraded by watershed urbanization. Hydrologic, geomorphic, chemical and thermal adjustment following urban development contributes to substantial biodiversity loss in impacted streams. However, the extent of degradation along an urban gradient may not be uniform among regions. The hydrogeologic and climatic setting in which a stream is located may influence the severity of abiotic and biotic impact induced by urban development. I explored and compared differences in stream ecosystem responses to urbanization between the Coastal Plain and Piedmont physiographic regions of the eastern United States. Taxon-specific responses of fishes and macroinvertebrates as well as the coherence of benthic invertebrate communities along gradients of landscape stressors were quantified. Hydrologic, chemical and thermal impact induced by watershed urbanization was compared between the two physiographic provinces using existent large datasets collected by various governmental entities. I also compared the severity geomorphic and sediment regime alteration in urban streams between regions using direct measurements of channel morphometry and in situ natural experiments within
American Fisheries Society Symposium 47:409–423, 2005 © 2005 by the American Fisheries Society Fish Assemblage Responses to Urban Intensity Gradients in
"... Abstract.—We examined fish assemblage responses to urban intensity gradients in two contrasting ..."
Abstract
- Add to MetaCart
Abstract.—We examined fish assemblage responses to urban intensity gradients in two contrasting
Stressors to Imperiled Fishes in the Etowah Basin Mechanisms, Sources and Management under the Etowah HCP
, 2006
"... The Etowah River basin in Georgia, USA, supports nine imperiled fish species that are the object of protection under the proposed Etowah Habitat Conservation Plan (HCP). With urban land cover steadily increasing in the basin at the expense of forest and agricultural land cover, development-related a ..."
Abstract
- Add to MetaCart
The Etowah River basin in Georgia, USA, supports nine imperiled fish species that are the object of protection under the proposed Etowah Habitat Conservation Plan (HCP). With urban land cover steadily increasing in the basin at the expense of forest and agricultural land cover, development-related activities and their consequences appear, as a group, to be the major threat to the species. However, urbanization is a complex phenomenon that involves numerous intermediate stressors. The purpose of this study is to review the scientific literature on urban stressors with the goal of identifying the major threats to the survival of fishes, so that management strategies may be implemented to avoid or minimize these threats as part of the Etowah HCP. We identify ten potential stressors: sedimentation, hydrologic alteration, extensive riparian buffer loss, contaminants (heavy metals, pesticides, etc.), movement barriers, channelization /piping of streams, invasive species, temperature alteration, loss of woody debris and eutrophication. For each we review the mechanisms by which the stressors may affect fish, the likely sources of the stressors within the Etowah, and the management strategies to be implemented under the Etowah HCP to address the stressors. We conclude that the first six stressors listed above are likely to be significant threats that must be managed by the Etowah HCP. We identify the most significant source of stressors as stormwater runoff from impervious surfaces, and the most critical policy as a stormwater management ordinance.
