Document Detail

Long-term investigation of benthic fauna and the influence of treated ballast water disposal in Port Valdez, Alaska.
MedLine Citation:
PMID:  12146819     Owner:  NLM     Status:  MEDLINE    
Benthic faunal structure and hydrocarbon concentrations in sediments were examined annually for 10 years (1989-1998) in Port Valdez, Alaska, where a near-bottom permitted discharge of treated tanker ballast waters containing residual petroleum has occurred since 1977. Measured concentrations of hydrocarbons in sediments near the discharge showed detectable increases in concentration, but on only one occasion were these increases either to levels exceeding ecotoxicological thresholds (Effects-Range Low, ER-L) or associated with alterations in the benthic community. Changes in faunal structure indicating disturbance were observed at one station near the discharge from 1995 to 1997 and were apparent as increased numbers of opportunistic taxa and anomalous trends in abundance and diversity. Minimum-effect (ME) hypotheses provided evidence of negligible to small effects on benthic infauna from disposal of treated ballast water. ME hypotheses have the potential to assist both researchers and managers by providing a tool to relate scientific results to ecological importance and decision criteria.
Arny L Blanchard; Howard M Feder; David G Shaw
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Marine pollution bulletin     Volume:  44     ISSN:  0025-326X     ISO Abbreviation:  Mar. Pollut. Bull.     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-07-30     Completed Date:  2003-01-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0260231     Medline TA:  Mar Pollut Bull     Country:  England    
Other Details:
Languages:  eng     Pagination:  367-82     Citation Subset:  IM    
Institute of Marine Science, School of Fisheries and Ocean Sciences, University of Alaska at Fairbanks. 99775-7220, USA.
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MeSH Terms
Geologic Sediments / chemistry*
Hydrocarbons / adverse effects*,  analysis
Petroleum / adverse effects*
Population Dynamics
Waste Disposal, Fluid
Reg. No./Substance:
0/Hydrocarbons; 0/Petroleum

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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