Influence of bioturbation by Hediste diversicolor on mercury fluxes from estuarine sediments: A mesocosms laboratory experiment
نویسندگان
چکیده
منابع مشابه
Influence of bioturbation by Hediste diversicolor on mercury fluxes from estuarine sediments: a mesocosms laboratory experiment.
Mercury, with its reactive forms being the most deleterious for the trophic chains, has been identified as a major pollutant in a few confined bodies of the coastal zone. Due to feeding, burrowing, and bioirrigation activities, infauna are known to play a crucial role in the biogeochemical processes of contaminants. The main goal of the present study is to evaluate the effects of Hediste divers...
متن کاملInfluence of bioturbation by the polychaete Nereis diversicolor on the structure of bacterial communities in oil contaminated coastal sediments.
Patterns of change in the structure of bacterial communities monitored by ribosomal intergenic spacer analysis (RISA) in oil contaminated sediments inhabited or not by the marine polychaete Nereis diversicolor were studied during 45 days under laboratory conditions. Results supported by principal component analysis showed a marked response of the bacterial communities to the oil contamination a...
متن کاملRelative influence of bioturbation and predation on organic matter processing in river sediments: a microcosm experiment
FLORIAN MERMILLOD-BLONDIN,* JEAN-PAUL GAUDET, † MAGALI GERINO, GASTON DESROSIERS, JACQUES JOSE AND MICHEL CREUZÉ DES CHÂTELLIERS* *UMR-CNRS 5023, Laboratoire d’Ecologie des Hydrosystèmes Fluviaux (LEHF), Université Claude Bernard Lyon 1, Domaine Scientifique de la Doua, Villeurbanne, France UMR-CNRS 5564, Laboratoire d’Etude des Transferts en Hydrologie et Environnement (LTHE), CNRS, INPG, IRD,...
متن کاملToxicity and bioaccumulation of sediment-associated silver nanoparticles in the estuarine polychaete, Nereis (Hediste) diversicolor.
In this study, the toxicities of sediment-associated silver added to sediment as commercially available silver nanoparticles (Ag NPs, 20 and 80 nm) and aqueous Ag (AgNO3) to the estuarine polychaete, Nereis (Hediste) diversicolor, were investigated for both individual and subcellular endpoints after 10 d of exposure. Both Ag NP types were characterized in parallel to the toxicity studies and fo...
متن کاملFluxes of Copper-Complexing Ligands from Estuarine Sediments
Most studies of the organic complexation of Cu in natural waters have focused on distributions and processes in the water column, where a significant fraction of Cu-complexing ligands may be biologically produced. We present direct evidence for a flux of Cu-complexing ligands from estuarine sediments, demonstrating that sediments are a significant, yet previously unrecognized source of the liga...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Marine Pollution Bulletin
سال: 2008
ISSN: 0025-326X
DOI: 10.1016/j.marpolbul.2007.10.024