Environmental biogeochemistry of mercury in Antarctic ecosystems
Polar regions are recognized as important sinks for long-range transport and deposition of Hg derived from natural and anthropogenic sources at lower latitudes. In previous studies we found enhanced Hg accumulation in soils, mosses and lichens from ice-free areas of Victoria Land facing the Terra No...
Published in: | Soil Biology and Biochemistry |
---|---|
Main Authors: | , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2007
|
Subjects: | |
Online Access: | http://hdl.handle.net/11365/10604 https://doi.org/10.1016/j.soilbio.2006.08.005 https://www.sciencedirect.com/science/article/pii/S0038071706003634?via=ihub |
id |
ftunivsiena:oai:usiena-air.unisi.it:11365/10604 |
---|---|
record_format |
openpolar |
spelling |
ftunivsiena:oai:usiena-air.unisi.it:11365/10604 2024-04-21T07:52:31+00:00 Environmental biogeochemistry of mercury in Antarctic ecosystems BARGAGLI, R. MONACI, F. BUCCI, C. Bargagli, R. Monaci, F. Bucci, C. 2007 STAMPA http://hdl.handle.net/11365/10604 https://doi.org/10.1016/j.soilbio.2006.08.005 https://www.sciencedirect.com/science/article/pii/S0038071706003634?via=ihub eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000242720300035 volume:39 issue:1 firstpage:352 lastpage:360 numberofpages:9 journal:SOIL BIOLOGY & BIOCHEMISTRY http://hdl.handle.net/11365/10604 doi:10.1016/j.soilbio.2006.08.005 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-33750956438 https://www.sciencedirect.com/science/article/pii/S0038071706003634?via=ihub Antarctic ecosystem Coastal polynya Cyanobacterial mat Lichen Mercury accumulation Mosse Sediment core Soils info:eu-repo/semantics/article 2007 ftunivsiena https://doi.org/10.1016/j.soilbio.2006.08.005 2024-03-28T00:42:44Z Polar regions are recognized as important sinks for long-range transport and deposition of Hg derived from natural and anthropogenic sources at lower latitudes. In previous studies we found enhanced Hg accumulation in soils, mosses and lichens from ice-free areas of Victoria Land facing the Terra Nova Bay coastal polynya. This study extends research to the distribution of organic C, total N, S, Hg, Al and Fe in surface soils, cyanobacterial mats and short sediment cores from four lacustrine ecosystems, each with different environmental characteristics and varying distances from the polynya. Results show that planktonic and benthic mats from lakes, along with mosses in the watershed, are the main sinks for Hg in summer meltwater. The C-normalized Hg concentrations in short sediment cores were higher in samples from lakes more exposed to marine aerosols from the coastal polynya. Reactive halogens in the aerosol promote the oxidation and deposition of atmospheric Hg in coastal ecosystems. The analysis of sediment cores did not reveal increasing Hg concentrations in recent sediments, except in the Lake 14 at Edmonson Point. The latter ice-free area is unaffected by the polynya and the increase in Hg concentrations in surface sediments could be due to local changes in lake water level and S biogeochemistry. Although change in sea ice coverage may enhance the role of Antarctic coastal ecosystems as sink in the global Hg cycle, our results seem to exclude possible risks for Antarctic terrestrial and freshwater organisms. © 2006 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Sea ice Victoria Land Università degli Studi di Siena: USiena air Soil Biology and Biochemistry 39 1 352 360 |
institution |
Open Polar |
collection |
Università degli Studi di Siena: USiena air |
op_collection_id |
ftunivsiena |
language |
English |
topic |
Antarctic ecosystem Coastal polynya Cyanobacterial mat Lichen Mercury accumulation Mosse Sediment core Soils |
spellingShingle |
Antarctic ecosystem Coastal polynya Cyanobacterial mat Lichen Mercury accumulation Mosse Sediment core Soils BARGAGLI, R. MONACI, F. BUCCI, C. Environmental biogeochemistry of mercury in Antarctic ecosystems |
topic_facet |
Antarctic ecosystem Coastal polynya Cyanobacterial mat Lichen Mercury accumulation Mosse Sediment core Soils |
description |
Polar regions are recognized as important sinks for long-range transport and deposition of Hg derived from natural and anthropogenic sources at lower latitudes. In previous studies we found enhanced Hg accumulation in soils, mosses and lichens from ice-free areas of Victoria Land facing the Terra Nova Bay coastal polynya. This study extends research to the distribution of organic C, total N, S, Hg, Al and Fe in surface soils, cyanobacterial mats and short sediment cores from four lacustrine ecosystems, each with different environmental characteristics and varying distances from the polynya. Results show that planktonic and benthic mats from lakes, along with mosses in the watershed, are the main sinks for Hg in summer meltwater. The C-normalized Hg concentrations in short sediment cores were higher in samples from lakes more exposed to marine aerosols from the coastal polynya. Reactive halogens in the aerosol promote the oxidation and deposition of atmospheric Hg in coastal ecosystems. The analysis of sediment cores did not reveal increasing Hg concentrations in recent sediments, except in the Lake 14 at Edmonson Point. The latter ice-free area is unaffected by the polynya and the increase in Hg concentrations in surface sediments could be due to local changes in lake water level and S biogeochemistry. Although change in sea ice coverage may enhance the role of Antarctic coastal ecosystems as sink in the global Hg cycle, our results seem to exclude possible risks for Antarctic terrestrial and freshwater organisms. © 2006 Elsevier Ltd. All rights reserved. |
author2 |
Bargagli, R. Monaci, F. Bucci, C. |
format |
Article in Journal/Newspaper |
author |
BARGAGLI, R. MONACI, F. BUCCI, C. |
author_facet |
BARGAGLI, R. MONACI, F. BUCCI, C. |
author_sort |
BARGAGLI, R. |
title |
Environmental biogeochemistry of mercury in Antarctic ecosystems |
title_short |
Environmental biogeochemistry of mercury in Antarctic ecosystems |
title_full |
Environmental biogeochemistry of mercury in Antarctic ecosystems |
title_fullStr |
Environmental biogeochemistry of mercury in Antarctic ecosystems |
title_full_unstemmed |
Environmental biogeochemistry of mercury in Antarctic ecosystems |
title_sort |
environmental biogeochemistry of mercury in antarctic ecosystems |
publishDate |
2007 |
url |
http://hdl.handle.net/11365/10604 https://doi.org/10.1016/j.soilbio.2006.08.005 https://www.sciencedirect.com/science/article/pii/S0038071706003634?via=ihub |
genre |
Antarc* Antarctic Sea ice Victoria Land |
genre_facet |
Antarc* Antarctic Sea ice Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000242720300035 volume:39 issue:1 firstpage:352 lastpage:360 numberofpages:9 journal:SOIL BIOLOGY & BIOCHEMISTRY http://hdl.handle.net/11365/10604 doi:10.1016/j.soilbio.2006.08.005 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-33750956438 https://www.sciencedirect.com/science/article/pii/S0038071706003634?via=ihub |
op_doi |
https://doi.org/10.1016/j.soilbio.2006.08.005 |
container_title |
Soil Biology and Biochemistry |
container_volume |
39 |
container_issue |
1 |
container_start_page |
352 |
op_container_end_page |
360 |
_version_ |
1796935741324918784 |