Document Detail

Relationships between benthic macroinvertebrate community structure and geospatial, habitat, in-stream water chemistry, and surfactants in the effluent-dominated Trinity River, Texas, USA.
MedLine Citation:
PMID:  21312245     Owner:  NLM     Status:  Publisher    
Over the past 20 years, benthic macroinvertebrate community structure studies have been conducted on the upper Texas Trinity River, USA, which is dominated by municipal wastewater treatment plant (WWTP) and industrial effluents. The Trinity River is located in the Dallas-Fort Worth metropolitan area, and is the most highly populated and industrialized watershed in Texas. As such, the Trinity River represents a near-worst-case scenario to examine the environmental effects of domestic-municipal and industrial effluents on aquatic life. A 1987 to 1988 study concluded that many stretches of the river supported a diverse benthic community structure; however, a decline in taxa richness occurred immediately downstream of WWTPs. A 2005 study designed to parallel the 1987 to 1988 efforts evaluated how changes in water quality, habitat, and increased urbanization impacted benthic community structure. Physical-chemical measurements, habitat quality, geospatial variables, and benthic macroinvertebrates were collected from ten sites. Surfactants were measured and toxic units (TUs) were calculated for surface water and pore water as indicators of domestic/household use of cleaning products. Total TUs indicated a low potential for biological impacts. Toxic unit distribution was not dependent on WWTP location and did not correlate with any benthic variable. Eight environmental parameters were determined to be useful for predicting changes in benthic macroinvertebrate community structure: surfactant surface water TUs (SWTU), in-stream habitat cover, and surface water total organic carbon were the top three parameters. Abundance, taxa richness, and taxa similarity in 2005 had increased since the earlier study throughout the immediate vicinity of the metropolitan area.Environ. Toxicol. Chem. © 2011 SETAC.
Jaime L Slye; James H Kennedy; David R Johnson; Sam F Atkinson; Scott D Dyer; Michael Ciarlo; Kathleen Stanton; Hans Sanderson; Allen M Nielsen; Bradford B Price
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-2-10
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  -     ISSN:  1552-8618     ISO Abbreviation:  -     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-2-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 SETAC.
Institute of Applied Science, Department of Biological Sciences, University of North Texas, Denton, Texas, USA.
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