Mercury in the ecosystem of Admiralty Bay, King George Island, Antarctica: Occurrence and trophic distribution

Abstract : Mercury (Hg) can reach the environment through natural and human-related sources, threatening ecosystems all over the planet due to its well-known deleterious effects. Therefore, Antarctic trophic webs, despite being relatively isolated, are not exempt of its influence. To evaluate Hg concentrations in an Antarctic ecosystem, different tissues from 2 species of invertebrates, 2 of fish, 8 of birds, 4 of pinnipeds and at least 5 of vegetation were investigated (n=176). For animals, values ranged from 0.018 to 48.7 μg g−1 dw (whole Antarctic krill and Antarctic Fur Seal liver). They were generally correlated to trophic position (assessed by δ15N and δ13C) but also to cephalopods and myctophids consumption. For vegetation, values ranged from 0.014 to 0.227 μg g−1 dw (Colobanthus quitensis and an unidentified lichen), with lichens presenting significantly higher values than mosses, likely due to year-round exposure and absorption of animal derived organic matter, as hypothesized by literature.
Document type :
Journal articles
Complete list of metadatas

Cited literature [79 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01431477
Contributor : Paco Bustamante <>
Submitted on : Tuesday, January 10, 2017 - 11:08:00 PM
Last modification on : Thursday, January 11, 2018 - 6:23:35 AM
Long-term archiving on : Tuesday, April 11, 2017 - 5:08:22 PM

File

Cipro et al 2017 MPB.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Caio Cipro, Rosalinda Montone, Paco Bustamante. Mercury in the ecosystem of Admiralty Bay, King George Island, Antarctica: Occurrence and trophic distribution. Marine Pollution Bulletin, Elsevier, 2017, 114, pp.564 - 570. ⟨10.1016/j.marpolbul.2016.09.024⟩. ⟨hal-01431477⟩

Share

Metrics

Record views

177

Files downloads

308