Document Detail


Multiple stressor effects of herbicide, pH, and food on wetland zooplankton and a larval amphibian.
MedLine Citation:
PMID:  17904219     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Interactions of herbicides and natural environmental stressors such as pH and food availability are poorly understood. We tested a chemical formulation of triclopyr (Release) at environmentally relevant test concentrations (0.25 and 0.50 mg L(-1)) in combination with two levels of pH (pH 5.5 and 7.5), and two levels of food availability (high and low). Population level effects of each stressor alone and in combination with the others were investigated using Simocephalus vetulus, a zooplankton species, and Rana pipiens tadpoles (Gosner stage 25), both common to forest ponds and wetlands. Herbicide treatments resulted in significant decreases in survival of both test species as well as reproduction and development time for S. vetulus at levels 5-10x below predicted worst case environmental concentrations (2.6 mg L(-1)). This laboratory study demonstrates a probable risk of toxic effects of Release herbicide which may be significantly increased by low food availability and by low pH at environmentally relevant concentrations.
Authors:
C Y Chen; K M Hathaway; D G Thompson; C L Folt
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2007-09-27
Journal Detail:
Title:  Ecotoxicology and environmental safety     Volume:  71     ISSN:  1090-2414     ISO Abbreviation:  Ecotoxicol. Environ. Saf.     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-08-04     Completed Date:  2008-11-03     Revised Date:  2014-09-08    
Medline Journal Info:
Nlm Unique ID:  7805381     Medline TA:  Ecotoxicol Environ Saf     Country:  United States    
Other Details:
Languages:  eng     Pagination:  209-18     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Crustacea / drug effects*
Dose-Response Relationship, Drug
Ecosystem
Glycolates / toxicity*
Herbicides / toxicity*
Hydrogen-Ion Concentration
Larva / drug effects,  growth & development
Rana pipiens / growth & development*
Reproduction / drug effects
Time Factors
Zooplankton / drug effects*
Grant Support
ID/Acronym/Agency:
P42 ES007373/ES/NIEHS NIH HHS; P42 ES007373-15/ES/NIEHS NIH HHS; P42 ESO7373-7//PHS HHS
Chemical
Reg. No./Substance:
0/Glycolates; 0/Herbicides; MV06PHJ6I0/triclopyr
Comments/Corrections

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