Comparison of benthic foraminifera and macrofaunal indicators of the impact of oil-based drill mud disposal

Type Article
Date 2010-11
Language English
Author(s) Denoyelle Marieva1, 2, 3, Jorissen Frans J.1, 2, Martin Daniel4, Galgani FrancoisORCID5, Mine Jacques3
Affiliation(s) 1 : Univ Angers, UPRES EA BIAF 2644, Lab Recent & Fossil Bioindicators, F-49045 Angers, France.
2 : LEBIM, Ile Dyeu, France.
3 : TOTAL SA, DGEP HSE ENV, F-92078 Paris, France.
4 : CSIC, CEAB, Catalunya 17300, Girona, Spain.
5 : IFREMER Corse, ZI Furiani, F-20600 Bastia, France.
Source Marine Pollution Bulletin (0025-326X) (Pergamon-elsevier Science Ltd), 2010-11 , Vol. 60 , N. 11 , P. 2007-2021
DOI 10.1016/j.marpolbul.2010.07.024
WOS© Times Cited 40
Keyword(s) Bio-indicators, Biotic index, Drilling mud, Foraminifera, Macrofauna
Abstract We compare foraminifera and macrofauna as bio-indicators of oil-based drill mud disposal site off Congo. The most polluted sites are characterized by poor faunas, dominated by some very tolerant taxa. Slightly further from the disposal site, there is an area with strongly increased densities, heavily dominated by opportunistic taxa. Still further, macrofauna appears to be similar to that at the reference area, but the foraminiferal meiofauna still suggests a slight environmental perturbation. The foraminiferal FIEI index, based on the species distribution in the study area, appears to be more discriminative than the macrofaunal ITI index, based on a priori definitions of the trophic guilds of the various taxa. Our comparative approach allows us to point out the benefits of (1) the use of macrofauna and foraminifera together and (2) the definition of the species groups used in biotic indices on the basis of observations made directly in the study area. (C) 2010 Elsevier Ltd. All rights reserved.
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