Effects of estuarine sediment contamination on feeding and on key physiological functions of the polychaete Hediste diversicolor: Laboratory and in situ assays

Aquatic Toxicology
Susana M MoreiraLúcia Guilhermino

Abstract

This study aimed at integrating postexposure feeding and some biochemical parameters in the responses of the estuarine polychaeta, Hediste diversicolor, to controlled laboratory exposure conditions and to in situ exposures scenario of sediment contamination. Since H. diversicolor feeding may be considered as a major rate-limiting step in the processing of detritus in European estuaries, a reduction in feeding activity may have implications not only at the individual and population level of the species but also in detritus processing and in organic matter decomposition rates at the ecosystem level. The biochemical parameters were chosen as indicators of four key physiological functions: neurotransmission, metabolic condition, detoxification processes and antioxidant defences. The Mira and Sado estuaries, located in the Southwest coast of Portugal and classified as undisturbed and impacted, respectively, were selected as sites for this study. A significant depression in H. diversicolor postexposure feeding (from 30 to 70%) was consistently detected in all impacted sediments, supporting the sensitivity and responsiveness of feeding as a sublethal toxicity endpoint. Alongside with a reduced energy intake, an increased rate of organ...Continue Reading

Citations

Mar 5, 2011·Archives of Environmental Contamination and Toxicology·Julia Ramos-GómezT Angel DelValls
Dec 25, 2008·Environmental Monitoring and Assessment·Cláudia RibeiroMaria João Rocha
Feb 23, 2010·Environmental Science and Pollution Research International·Abel L G FerreiraSusana Loureiro
Mar 22, 2014·Environmental Science and Pollution Research International·Catherine MouneyracEugénia Valsami-Jones
Feb 14, 2016·Environmental Pollution·Monica Martinez-HaroJoão Carlos Marques
Jan 30, 2016·Pesticide Biochemistry and Physiology·Abhilasha ChaurasiaU S Gupta
Dec 6, 2012·Ecotoxicology and Environmental Safety·O Fossi TankouaC Amiard-Triquet
Aug 17, 2010·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Ana FerrariAndrés Venturino
Apr 30, 2010·Ecotoxicology and Environmental Safety·S M MoreiraA M V M Soares
Mar 11, 2009·The Science of the Total Environment·Carlos Sanz-Lázaro, Arnaldo Marín
Jul 9, 2008·The Science of the Total Environment·C Marisa R AlmeidaM Teresa S D Vasconcelos
Apr 10, 2008·Ecotoxicology and Environmental Safety·S C AntunesF Gonçalves
Aug 4, 2007·Ecotoxicology and Environmental Safety·Fu-hong Sun, Qi-xing Zhou
Jul 24, 2012·Environmental Toxicology and Chemistry·Enrique A RosenbaumAndrés Venturino
Apr 19, 2016·Marine Environmental Research·Rosa FreitasAmadeu M V M Soares
Mar 18, 2015·Environmental Toxicology and Chemistry·Yong Jin, Wen-Xiong Wang
May 6, 2015·Environmental Science and Pollution Research International·Rosa FreitasBruno Nunes

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