Assessment of antioxidant responses and trace metal accumulation by digestive gland of ribbed mussel Aulacomya atra atra from Northern Patagonia

Seasonal and spatial variability of trace metal concentrations and of a battery of antioxidant parameters were evaluated in digestive gland of the ribbed mussel Aulacomya atra atra. Fe, Al and Cu accumulated in tissue exhibited maximum values in winter, coinciding partially with the highest labile c...

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Bibliographic Details
Published in:Ecotoxicology and environmental safety 2013-06, Vol.92, p.39-50
Main Authors: Giarratano, Erica, Gil, Mónica N., Malanga, Gabriela
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Animals
Applied ecology
Argentina
Biological and medical sciences
Biomarkers
Biomonitoring
Bivalvia - chemistry
Bivalvia - metabolism
Ecotoxicology, biological effects of pollution
Environmental Monitoring
Fundamental and applied biological sciences. Psychology
General aspects
Invertebrates
Metals - analysis
Metals - metabolism
Mollusca
Oxidative stress
Ribbed mussel Aulacomya atra atra
Seasons
Techniques
Trace metals
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - metabolism
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Summary:Seasonal and spatial variability of trace metal concentrations and of a battery of antioxidant parameters were evaluated in digestive gland of the ribbed mussel Aulacomya atra atra. Fe, Al and Cu accumulated in tissue exhibited maximum values in winter, coinciding partially with the highest labile concentrations of Fe and Cu in sediment. Metals, as other pollutants, are known to influence the oxidative status of organisms and antioxidant enzymes have been often proposed as biomarkers of contaminant effects. Seasonal variations of trace metals did not appear to influence those of biochemical parameters, which generally showed an opposite trend with higher enzymatic activities in summer when trace metal concentrations were lower. Organisms from Punta Cuevas (control site) showed higher induction of reactive oxygen species production than those from both considered impacted sites, suggesting the possibility of some biochemical adaptation in organisms or a higher modulation of environmental and physiological factors on antioxidant responses than levels of trace metals. This study, which is the first in the area in this matter, showed that seasonal variations of potential biomarkers should be incorporated into interpretation of long-term biomonitoring studies in this marine coastal ecosystem. ► Higher bioavailability of Fe and Cu were found in winter at FW and SD respectively. ► The highest bioavailability of Al to mussels from PC needs further research. ► ROS was induced by Fe in winter and showed a direct correlation. ► Trace metal seasonal variations did not appear to influence biochemical parameters. ► Enzymatic activities were higher in summer when trace metals were lower.
ISSN:0147-6513
1090-2414
DOI:10.1016/j.ecoenv.2013.02.007