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Main Title Responses of Developing Estuarine Macrobenthic Communities to Drilling Muds.
Author Tagatz, M. E. ; Ivey, J. M. ; DalBo, C. E. ; Oglesby, J. L. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Year Published 1982
Report Number EPA-600/J-81-070 ;CONTRIB-413;
Stock Number PB82-236415
Additional Subjects Drilling fluids ; Mud ; Plankton ; Larvae ; Benthos ; Concentration(Composition) ; Reprints ; Water pollution effects(Animals) ; Molgula manhattensis
Library Call Number Additional Info Location Last
NTIS  PB82-236415 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
Abstract The effects of drilling mud, used in oil drilling operations, on development of estuarine macrobenthic communities from settling planktonic larvae were assessed by comparing numbers and species of animals that grew in uncontaminated and contaminated aquaria for 8 weeks. Aquaria contained sand and were continuously supplied unfiltered seawater. Seven lignosulfonate-type drilling muds obtained from an active exploratory platform in estuarine waters were tested consecutively at nominal concentrations of 0.5, 5, and 50 parts per million (ppm) in the water column. Numbers of tunicates, mollusks, and annelids per aquarium were significantly (alpha = 0.05) decreased from control numbers in 50 ppm. Structural differences in communities exposed to 50 ppm from those in the control and lower concentrations were indicated by a decrease in Spearman's measure of rank correlation of species abundance and an increase in the Shannon-Weaver index of species diversity. A total of 13 species occurred in 50 ppm compared to 23 species in each of the other situations. Growth in diameter of Molgula manhattensis was significantly affected in all concentrations of mud.
Supplementary Notes Pub. in Estuaries, v5 n2 p131-137 Jun 82. Prepared in cooperation with University of West Florida, Pensacola. Inst. for Statistical and Mathematical Modeling.
NTIS Title Notes Journal article.
Title Annotations Reprint: Responses of Developing Estuarine Macrobenthic Communities to Drilling Muds.
PUB Date Free Form Jun 82
Category Codes 6T; 6F; 57Y; 68D
NTIS Prices PC A02/MF A01
Primary Description 600/04
Document Type NT
Cataloging Source NTIS/MT
Control Number 323819985
Origin NTIS
Type CAT