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Mercury accumulation along a contamination gradient and nondestructive indices of bioaccumulation in amphibians
Environmental toxicology and chemistry, 2010-04, Vol.29 (4), p.980-988
Bergeron, Christine M.
Bodinof, Catherine M.
Unrine, Jason M.
Hopkins, William A.
2010
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Bergeron, Christine M.
Bodinof, Catherine M.
Unrine, Jason M.
Hopkins, William A.
Titel
Mercury accumulation along a contamination gradient and nondestructive indices of bioaccumulation in amphibians
Ist Teil von
Environmental toxicology and chemistry, 2010-04, Vol.29 (4), p.980-988
Ort / Verlag
Hoboken, USA: John Wiley & Sons, Inc
Erscheinungsjahr
2010
Quelle
MEDLINE
Beschreibungen/Notizen
Mercury (Hg) is an important environmental contaminant due to its global distribution, tendency to bioaccumulate, and toxicity in wildlife. However, Hg has received little attention in amphibians compared to other vertebrates. Amphibians vary widely in life history strategies and feeding ecologies, which could influence Hg exposure and accumulation. To determine whether species and life stage affects Hg bioaccumulation, adults from three species (Plethodon cinereus, Eurycea bislineata, and Bufo americanus) and larvae from the latter two species were collected along a contamination gradient on the South River (VA, USA). Total Hg (THg) concentrations in the contaminated site were 3.5 to 22 times higher than in the reference site. Differences were found in THg concentrations in amphibians that were consistent with their habitat requirements and feeding preferences. In general, adults (3,453 ± 196 ng/g, dry mass) and larvae (2,479 ± 171 ng/g) of the most river‐associated species, E. bislineata, had the highest THg concentrations, followed by B. americanus tadpoles (2,132 ± 602 ng/g), whereas adults of the more terrestrial B. americanus (598 ± 117 ng/g) and P. cinereus (583 ± 178 ng/g) had the lowest concentrations. In addition, nondestructive sampling techniques were developed. For the salamander species, THg concentrations in tail tissue were strongly correlated (r ≥ 0.97) with the remaining carcass. A strong positive correlation (r = 0.92) also existed between blood and whole‐body THg concentrations in B. americanus. These results suggest that amphibians and their terrestrial predators may be at risk of Hg exposure in this system and that nondestructive methods may be a viable sampling alternative that reduces impacts to local populations. Environ. Toxicol. Chem. 2010;29:980–988. © 2010 SETAC
Sprache
Englisch
Identifikatoren
ISSN: 0730-7268, 1552-8618
eISSN: 1552-8618
DOI: 10.1002/etc.121
Titel-ID: cdi_proquest_miscellaneous_858423795
Format
–
Schlagworte
Adults
,
Age Factors
,
Amphibian
,
Amphibians - metabolism
,
Animals
,
Bioaccumulation
,
Bufo americanus
,
Bufonidae - metabolism
,
Caudata
,
Contamination
,
Correlation
,
Eurycea bislineata
,
Feeding
,
Larvae
,
Mercury
,
Mercury - pharmacokinetics
,
Nondestructive tissues
,
Plethodon cinereus
,
Reptiles & amphibians
,
Rivers
,
Rivers - chemistry
,
Sampling
,
Species Specificity
,
Toxicity
,
Toxicology
,
Water Pollutants, Chemical - pharmacokinetics
,
Wildlife
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