Mercury uptake and dynamics in sea ice algae, phytoplankton and grazing copepods from a Beaufort Sea Arctic marine food web
Mercury (Hg) is one of the primary contaminants of concern in the Arctic marine ecosystem. Methyl Hg (MeHg) is known to biomagnify in food webs. During the International Polar Year - Circumpolar Flaw Lead study, sea ice, seawater, bottom ice algae, phytoplankton and the herbivorous copepods were col...
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ftunivmanitoba:oai:mspace.lib.umanitoba.ca:1993/8907 2023-06-18T03:35:53+02:00 Mercury uptake and dynamics in sea ice algae, phytoplankton and grazing copepods from a Beaufort Sea Arctic marine food web Burt, Alexis Emelia Stern, Gary (Environment and Geography) Wang, Feiyue (Chemistry/Environment and Geography) Goldsborough, Gordon (Biological Science) Hanson, Mark (Environment and Geography) 2012-09-21 application/pdf http://hdl.handle.net/1993/8907 eng eng http://hdl.handle.net/1993/8907 open access Mercury Arctic Sea ice algae Zooplankton master thesis 2012 ftunivmanitoba 2023-06-04T17:41:52Z Mercury (Hg) is one of the primary contaminants of concern in the Arctic marine ecosystem. Methyl Hg (MeHg) is known to biomagnify in food webs. During the International Polar Year - Circumpolar Flaw Lead study, sea ice, seawater, bottom ice algae, phytoplankton and the herbivorous copepods were collected from the Amundsen Gulf to test whether ice algae and phytoplankton assimilate Hg from their habitat, and whether Hg bioaccumulates from the seawater to the primary consumers. Sea ice algae were found to accumulate Hg primarily from the bulk bottom ice, and the sea ice algae bloom depleted Hg stored within the bottom section of the ice. Furthermore, biodilution of Hg was observed to occur in sea ice algae. Higher concentrations of Hg were also found in phytoplankton and in grazing copepods. A positive correlation between MeHg and trophic level suggests the occurrence of MeHg biomagnification even at these low trophic positions. October 2012 Master Thesis Amundsen Gulf Arctic Beaufort Sea ice algae International Polar Year Phytoplankton Sea ice Zooplankton Copepods MSpace at the University of Manitoba Arctic |
institution |
Open Polar |
collection |
MSpace at the University of Manitoba |
op_collection_id |
ftunivmanitoba |
language |
English |
topic |
Mercury Arctic Sea ice algae Zooplankton |
spellingShingle |
Mercury Arctic Sea ice algae Zooplankton Burt, Alexis Emelia Mercury uptake and dynamics in sea ice algae, phytoplankton and grazing copepods from a Beaufort Sea Arctic marine food web |
topic_facet |
Mercury Arctic Sea ice algae Zooplankton |
description |
Mercury (Hg) is one of the primary contaminants of concern in the Arctic marine ecosystem. Methyl Hg (MeHg) is known to biomagnify in food webs. During the International Polar Year - Circumpolar Flaw Lead study, sea ice, seawater, bottom ice algae, phytoplankton and the herbivorous copepods were collected from the Amundsen Gulf to test whether ice algae and phytoplankton assimilate Hg from their habitat, and whether Hg bioaccumulates from the seawater to the primary consumers. Sea ice algae were found to accumulate Hg primarily from the bulk bottom ice, and the sea ice algae bloom depleted Hg stored within the bottom section of the ice. Furthermore, biodilution of Hg was observed to occur in sea ice algae. Higher concentrations of Hg were also found in phytoplankton and in grazing copepods. A positive correlation between MeHg and trophic level suggests the occurrence of MeHg biomagnification even at these low trophic positions. October 2012 |
author2 |
Stern, Gary (Environment and Geography) Wang, Feiyue (Chemistry/Environment and Geography) Goldsborough, Gordon (Biological Science) Hanson, Mark (Environment and Geography) |
format |
Master Thesis |
author |
Burt, Alexis Emelia |
author_facet |
Burt, Alexis Emelia |
author_sort |
Burt, Alexis Emelia |
title |
Mercury uptake and dynamics in sea ice algae, phytoplankton and grazing copepods from a Beaufort Sea Arctic marine food web |
title_short |
Mercury uptake and dynamics in sea ice algae, phytoplankton and grazing copepods from a Beaufort Sea Arctic marine food web |
title_full |
Mercury uptake and dynamics in sea ice algae, phytoplankton and grazing copepods from a Beaufort Sea Arctic marine food web |
title_fullStr |
Mercury uptake and dynamics in sea ice algae, phytoplankton and grazing copepods from a Beaufort Sea Arctic marine food web |
title_full_unstemmed |
Mercury uptake and dynamics in sea ice algae, phytoplankton and grazing copepods from a Beaufort Sea Arctic marine food web |
title_sort |
mercury uptake and dynamics in sea ice algae, phytoplankton and grazing copepods from a beaufort sea arctic marine food web |
publishDate |
2012 |
url |
http://hdl.handle.net/1993/8907 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Amundsen Gulf Arctic Beaufort Sea ice algae International Polar Year Phytoplankton Sea ice Zooplankton Copepods |
genre_facet |
Amundsen Gulf Arctic Beaufort Sea ice algae International Polar Year Phytoplankton Sea ice Zooplankton Copepods |
op_relation |
http://hdl.handle.net/1993/8907 |
op_rights |
open access |
_version_ |
1769010907925446656 |