Isotopic signatures and mercury content of arctic char and their prey, and water chemistry of 18 arctic Canadian lakes
Concentrations of mercury (Hg) have increased slowly in landlocked Arctic char over a 10- to 15-year period in the Arctic. Fluxes of Hg to sediments also show increases in most Arctic lakes. Correlation of Hg with trophic level (TL) was used to investigate and compare biomagnification of Hg in food...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.810149 2023-05-15T14:23:28+02:00 Isotopic signatures and mercury content of arctic char and their prey, and water chemistry of 18 arctic Canadian lakes Gantner, Nikolaus Power, Michael Iqaluk, Deborah Meili, Markus Borg, Hans Sundbom, Marcus Solomon, Keith R Lawson, Greg Muir, Derek C G MEDIAN LATITUDE: 74.295945 * MEDIAN LONGITUDE: -85.003728 * SOUTH-BOUND LATITUDE: 61.280000 * WEST-BOUND LONGITUDE: -107.750000 * NORTH-BOUND LATITUDE: 82.110000 * EAST-BOUND LONGITUDE: -67.480000 2010-04-12 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.810149 https://doi.org/10.1594/PANGAEA.810149 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.810149 https://doi.org/10.1594/PANGAEA.810149 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Gantner, Nikolaus; Power, Michael; Iqaluk, Deborah; Meili, Markus; Borg, Hans; Sundbom, Marcus; Solomon, Keith R; Lawson, Greg; Muir, Derek C G (2010): Mercury concentrations in landlocked Arctic char (Salvelinus alpinus) from the Canadian Arctic. Part I: Insights from trophic relationships in 18 lakes. Environmental Toxicology and Chemistry, 29(3), 621-632, https://doi.org/10.1002/etc.95 International Polar Year (2007-2008) IPY Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.810149 https://doi.org/10.1002/etc.95 2023-01-20T07:32:58Z Concentrations of mercury (Hg) have increased slowly in landlocked Arctic char over a 10- to 15-year period in the Arctic. Fluxes of Hg to sediments also show increases in most Arctic lakes. Correlation of Hg with trophic level (TL) was used to investigate and compare biomagnification of Hg in food webs from lakes in the Canadian Arctic sampled from 2002 to 2007. Concentrations of Hg (total Hg and methylmercury [MeHg]) in food webs were compared across longitudinal and latitudinal gradients in relation to d13C and d15N in periphyton, zooplankton, benthic invertebrates, and Arctic char of varying size-classes. Trophic magnification factors (TMFs) were calculated for the food web in each lake and related to available physical and chemical characteristics of the lakes. The relative content of MeHg increased with trophic level from 4.3 to 12.2% in periphyton, 41 to 79% in zooplankton, 59 to 72% in insects, and 74 to 100% in juvenile and adult char. The d13C signatures of adult char indicated coupling with benthic invertebrates. Cannibalism among char lengthened the food chain. Biomagnification was confirmed in all 18 lakes, with TMFs ranging from 3.5 ± 1.1 to 64.3 ± 0.8. Results indicate that TMFs and food chain length (FCL) are key factors in explaining interlake variability in biomagnification of [Hg] among different lakes. Dataset Arctic Arctic International Polar Year IPY Zooplankton PANGAEA - Data Publisher for Earth & Environmental Science Arctic ENVELOPE(-107.750000,-67.480000,82.110000,61.280000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
International Polar Year (2007-2008) IPY |
spellingShingle |
International Polar Year (2007-2008) IPY Gantner, Nikolaus Power, Michael Iqaluk, Deborah Meili, Markus Borg, Hans Sundbom, Marcus Solomon, Keith R Lawson, Greg Muir, Derek C G Isotopic signatures and mercury content of arctic char and their prey, and water chemistry of 18 arctic Canadian lakes |
topic_facet |
International Polar Year (2007-2008) IPY |
description |
Concentrations of mercury (Hg) have increased slowly in landlocked Arctic char over a 10- to 15-year period in the Arctic. Fluxes of Hg to sediments also show increases in most Arctic lakes. Correlation of Hg with trophic level (TL) was used to investigate and compare biomagnification of Hg in food webs from lakes in the Canadian Arctic sampled from 2002 to 2007. Concentrations of Hg (total Hg and methylmercury [MeHg]) in food webs were compared across longitudinal and latitudinal gradients in relation to d13C and d15N in periphyton, zooplankton, benthic invertebrates, and Arctic char of varying size-classes. Trophic magnification factors (TMFs) were calculated for the food web in each lake and related to available physical and chemical characteristics of the lakes. The relative content of MeHg increased with trophic level from 4.3 to 12.2% in periphyton, 41 to 79% in zooplankton, 59 to 72% in insects, and 74 to 100% in juvenile and adult char. The d13C signatures of adult char indicated coupling with benthic invertebrates. Cannibalism among char lengthened the food chain. Biomagnification was confirmed in all 18 lakes, with TMFs ranging from 3.5 ± 1.1 to 64.3 ± 0.8. Results indicate that TMFs and food chain length (FCL) are key factors in explaining interlake variability in biomagnification of [Hg] among different lakes. |
format |
Dataset |
author |
Gantner, Nikolaus Power, Michael Iqaluk, Deborah Meili, Markus Borg, Hans Sundbom, Marcus Solomon, Keith R Lawson, Greg Muir, Derek C G |
author_facet |
Gantner, Nikolaus Power, Michael Iqaluk, Deborah Meili, Markus Borg, Hans Sundbom, Marcus Solomon, Keith R Lawson, Greg Muir, Derek C G |
author_sort |
Gantner, Nikolaus |
title |
Isotopic signatures and mercury content of arctic char and their prey, and water chemistry of 18 arctic Canadian lakes |
title_short |
Isotopic signatures and mercury content of arctic char and their prey, and water chemistry of 18 arctic Canadian lakes |
title_full |
Isotopic signatures and mercury content of arctic char and their prey, and water chemistry of 18 arctic Canadian lakes |
title_fullStr |
Isotopic signatures and mercury content of arctic char and their prey, and water chemistry of 18 arctic Canadian lakes |
title_full_unstemmed |
Isotopic signatures and mercury content of arctic char and their prey, and water chemistry of 18 arctic Canadian lakes |
title_sort |
isotopic signatures and mercury content of arctic char and their prey, and water chemistry of 18 arctic canadian lakes |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.810149 https://doi.org/10.1594/PANGAEA.810149 |
op_coverage |
MEDIAN LATITUDE: 74.295945 * MEDIAN LONGITUDE: -85.003728 * SOUTH-BOUND LATITUDE: 61.280000 * WEST-BOUND LONGITUDE: -107.750000 * NORTH-BOUND LATITUDE: 82.110000 * EAST-BOUND LONGITUDE: -67.480000 |
long_lat |
ENVELOPE(-107.750000,-67.480000,82.110000,61.280000) |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic International Polar Year IPY Zooplankton |
genre_facet |
Arctic Arctic International Polar Year IPY Zooplankton |
op_source |
Supplement to: Gantner, Nikolaus; Power, Michael; Iqaluk, Deborah; Meili, Markus; Borg, Hans; Sundbom, Marcus; Solomon, Keith R; Lawson, Greg; Muir, Derek C G (2010): Mercury concentrations in landlocked Arctic char (Salvelinus alpinus) from the Canadian Arctic. Part I: Insights from trophic relationships in 18 lakes. Environmental Toxicology and Chemistry, 29(3), 621-632, https://doi.org/10.1002/etc.95 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.810149 https://doi.org/10.1594/PANGAEA.810149 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.810149 https://doi.org/10.1002/etc.95 |
_version_ |
1766296011830984704 |