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Dynamic features of ecophysiological response of freshwater clam to arsenic revealed by BLM-based toxicological model.

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Dynamic features of ecophysiological response of freshwater clam to arsenic revealed by BLM-based toxicological model.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Chen, Wei-Yu Liao, Chung-Min
Description	Author Affiliation: Chen WY ( Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei 10617, Taiwan, ROC.)
Abstract	The objective of this study was to use a quantitative process-based damage assessment model (DAM) associated with biotic ligand model (BLM) to examine the ecophysiological responses of freshwater clam Corbicula fluminea to waterborne arsenic. We carried out a 14-day exposure experiment to obtain bioaccumulation parameters and a 7-day acute toxicity bioassay to obtain survival data. To investigate the survival dynamics, we examined 2 key parameters characterizing bioaccumulation and damage regulation: capacity to eliminate body arsenic burden and reversible ability to recover the damage. Results show that uptake rate constant of 2.075 + or - 0.442 (mean + or - SE) ml g(-1) d(-1) during uptake phase and elimination rate constant was estimated to be 0.1995 + or - 0.022 d(-1). The derived bioconcentration factor of 10.401 ml g(-1) suggests that arsenic has a high potential for bioaccumulation in C. fluminea. Our results show that a negative association between bioaccumulation and the fraction of arsenic binding in biotic ligand at 50% mortality, indicating that C. fluminea with higher arsenic binding in gill biotic ligand at 50% mortality level gives a lower capacity to accumulate bioavailable arsenic. We found a linearly positive correlation between elimination rate and recovery rate constants. Yet, a potential tradeoff between ability to eliminate arsenic and ability to recover the damage is not found. We showed that an ecophysiological significance of C. fluminea exposed to arsenic can be revealed by the elimination-recovery regime. This research may also provide mechanistic insights into the development of biomonitoring organism such as C. fluminea mimicking metal bioaccumulation in a real situation.
File Format	HTM / HTML
ISSN	09639292
Issue Number	6
Volume Number	19
e-ISSN	15733017
Journal	Ecotoxicology
Language	English
Publisher	Springer
Publisher Date	2010-08-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Ecology Discipline Environmental Health Discipline Toxicology Arsenic Toxicity Bivalvia Drug Effects Water Pollutants, Chemical Animals Metabolism Physiology Fresh Water Chemistry Toxicity Tests, Acute Journal Article
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Medicine Toxicology Management, Monitoring, Policy and Law

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Dynamic features of ecophysiological response of freshwater clam to arsenic revealed by BLM-based toxicological model

Valve movement response of the freshwater clam Corbicula fluminea following exposure to waterborne arsenic.

A real-time biomonitoring system to detect arsenic toxicity by valve movement in freshwater clam Corbicula fluminea.

Systems-level modeling the effects of arsenic exposure with sequential pulsed and fluctuating patterns for tilapia and freshwater clam.

Toxicokinetics/toxicodynamics with damage feedback improves risk assessment for tilapia and freshwater clam exposed to arsenic.

The effects of the herbicide atrazine on freshwater snails.

Acute and chronic effects of sodium and potassium on the tropical freshwater cladoceran Pseudosida ramosa

Adapting an enzymatic toxicity test to allow comparative evaluation of natural freshwater biofilms' tolerance to metals.

Acute and chronic effects of atrazine and sodium dodecyl sulfate on the tropical freshwater cladoceran Pseudosida ramosa.

Dynamic features of ecophysiological response of freshwater clam to arsenic revealed by BLM-based toxicological model.

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Dynamic features of ecophysiological response of freshwater clam to arsenic revealed by BLM-based toxicological model

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A real-time biomonitoring system to detect arsenic toxicity by valve movement in freshwater clam Corbicula fluminea.

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Dynamic features of ecophysiological response of freshwater clam to arsenic revealed by BLM-based toxicological model.