Temporal trends, lake-to-lake variation, and climate effects on Arctic char (Salvelinus alpinus) mercury concentrations from six High Arctic lakes in Nunavut, Canada
Climate warming and mercury (Hg) are concurrently influencing Arctic ecosystems, altering their functioning and threatening food security. Non-anadromous Arctic char (Salvelinus alpinus) in small lakes were used to biomonitor these two anthropogenic stressors, because this iconic Arctic species is a...
Published in: | Science of The Total Environment |
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ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1304 2023-06-11T04:08:02+02:00 Temporal trends, lake-to-lake variation, and climate effects on Arctic char (Salvelinus alpinus) mercury concentrations from six High Arctic lakes in Nunavut, Canada Hudelson, Karista E. Muir, Derek C.G. Drevnick, Paul E. Köck, Günter Iqaluk, Deborah Wang, Xiaowa Kirk, Jane L. Barst, Benjamin D. Grgicak-Mannion, Alice Shearon, Rebecca Fisk, Aaron T. 2019-08-15T07:00:00Z https://scholar.uwindsor.ca/glierpub/302 https://doi.org/10.1016/j.scitotenv.2019.04.453 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/302 doi:10.1016/j.scitotenv.2019.04.453 https://doi.org/10.1016/j.scitotenv.2019.04.453 Great Lakes Institute for Environmental Research Publications 25-year record Climate Heavy metals Lacustrine Land-locked Arctic char text 2019 ftunivwindsor https://doi.org/10.1016/j.scitotenv.2019.04.453 2023-05-06T19:10:44Z Climate warming and mercury (Hg) are concurrently influencing Arctic ecosystems, altering their functioning and threatening food security. Non-anadromous Arctic char (Salvelinus alpinus) in small lakes were used to biomonitor these two anthropogenic stressors, because this iconic Arctic species is a long-lived top predator in relatively simple food webs, and yet population characteristics vary greatly, reflecting differences between lake systems. Mercury concentrations in six landlocked Arctic char populations on Cornwallis Island, Nunavut have been monitored as early as 1989, providing a novel dataset to examine differences in muscle [Hg] among char populations, temporal trends, and the relationship between climate patterns and Arctic char [Hg]. We found significant lake-to-lake differences in length-adjusted Arctic char muscle [Hg], which varied by up to 9-fold. Arctic char muscle [Hg] was significantly correlated to dissolved and particulate organic carbon concentrations in water; neither watershed area or vegetation cover explained differences. Three lakes exhibited significant temporal declines in length-adjusted [Hg] in Arctic char; the other three lakes had no significant trends. Though precipitation, temperature, wind speed, and sea ice duration were tested, no single climate variable was significantly correlated to length-adjusted [Hg] across populations. However, Arctic char Hg in Resolute Lake exhibited a significant correlation with sea ice duration, which is likely closely linked to lake ice duration, and which may impact Hg processing in lakes. Additionally, Arctic char [Hg] in Amituk Lake was significantly correlated to snow fall, which may be linked to Hg deposition. The lack of consistent temporal trends in neighboring char populations indicates that currently, within lake processes are the strongest drivers of [Hg] in char in the study lakes and potentially in other Arctic lakes, and that the influence of climate change will likely vary from lake to lake. Text Arctic Climate change Cornwallis Island Nunavut Salvelinus alpinus Sea ice University of Windsor, Ontario: Scholarship at UWindsor Arctic Nunavut Canada Cornwallis ENVELOPE(-54.464,-54.464,-61.072,-61.072) Resolute Lake ENVELOPE(-94.941,-94.941,74.688,74.688) Cornwallis Island ENVELOPE(-95.001,-95.001,75.135,75.135) Science of The Total Environment 678 801 812 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
25-year record Climate Heavy metals Lacustrine Land-locked Arctic char |
spellingShingle |
25-year record Climate Heavy metals Lacustrine Land-locked Arctic char Hudelson, Karista E. Muir, Derek C.G. Drevnick, Paul E. Köck, Günter Iqaluk, Deborah Wang, Xiaowa Kirk, Jane L. Barst, Benjamin D. Grgicak-Mannion, Alice Shearon, Rebecca Fisk, Aaron T. Temporal trends, lake-to-lake variation, and climate effects on Arctic char (Salvelinus alpinus) mercury concentrations from six High Arctic lakes in Nunavut, Canada |
topic_facet |
25-year record Climate Heavy metals Lacustrine Land-locked Arctic char |
description |
Climate warming and mercury (Hg) are concurrently influencing Arctic ecosystems, altering their functioning and threatening food security. Non-anadromous Arctic char (Salvelinus alpinus) in small lakes were used to biomonitor these two anthropogenic stressors, because this iconic Arctic species is a long-lived top predator in relatively simple food webs, and yet population characteristics vary greatly, reflecting differences between lake systems. Mercury concentrations in six landlocked Arctic char populations on Cornwallis Island, Nunavut have been monitored as early as 1989, providing a novel dataset to examine differences in muscle [Hg] among char populations, temporal trends, and the relationship between climate patterns and Arctic char [Hg]. We found significant lake-to-lake differences in length-adjusted Arctic char muscle [Hg], which varied by up to 9-fold. Arctic char muscle [Hg] was significantly correlated to dissolved and particulate organic carbon concentrations in water; neither watershed area or vegetation cover explained differences. Three lakes exhibited significant temporal declines in length-adjusted [Hg] in Arctic char; the other three lakes had no significant trends. Though precipitation, temperature, wind speed, and sea ice duration were tested, no single climate variable was significantly correlated to length-adjusted [Hg] across populations. However, Arctic char Hg in Resolute Lake exhibited a significant correlation with sea ice duration, which is likely closely linked to lake ice duration, and which may impact Hg processing in lakes. Additionally, Arctic char [Hg] in Amituk Lake was significantly correlated to snow fall, which may be linked to Hg deposition. The lack of consistent temporal trends in neighboring char populations indicates that currently, within lake processes are the strongest drivers of [Hg] in char in the study lakes and potentially in other Arctic lakes, and that the influence of climate change will likely vary from lake to lake. |
format |
Text |
author |
Hudelson, Karista E. Muir, Derek C.G. Drevnick, Paul E. Köck, Günter Iqaluk, Deborah Wang, Xiaowa Kirk, Jane L. Barst, Benjamin D. Grgicak-Mannion, Alice Shearon, Rebecca Fisk, Aaron T. |
author_facet |
Hudelson, Karista E. Muir, Derek C.G. Drevnick, Paul E. Köck, Günter Iqaluk, Deborah Wang, Xiaowa Kirk, Jane L. Barst, Benjamin D. Grgicak-Mannion, Alice Shearon, Rebecca Fisk, Aaron T. |
author_sort |
Hudelson, Karista E. |
title |
Temporal trends, lake-to-lake variation, and climate effects on Arctic char (Salvelinus alpinus) mercury concentrations from six High Arctic lakes in Nunavut, Canada |
title_short |
Temporal trends, lake-to-lake variation, and climate effects on Arctic char (Salvelinus alpinus) mercury concentrations from six High Arctic lakes in Nunavut, Canada |
title_full |
Temporal trends, lake-to-lake variation, and climate effects on Arctic char (Salvelinus alpinus) mercury concentrations from six High Arctic lakes in Nunavut, Canada |
title_fullStr |
Temporal trends, lake-to-lake variation, and climate effects on Arctic char (Salvelinus alpinus) mercury concentrations from six High Arctic lakes in Nunavut, Canada |
title_full_unstemmed |
Temporal trends, lake-to-lake variation, and climate effects on Arctic char (Salvelinus alpinus) mercury concentrations from six High Arctic lakes in Nunavut, Canada |
title_sort |
temporal trends, lake-to-lake variation, and climate effects on arctic char (salvelinus alpinus) mercury concentrations from six high arctic lakes in nunavut, canada |
publisher |
Scholarship at UWindsor |
publishDate |
2019 |
url |
https://scholar.uwindsor.ca/glierpub/302 https://doi.org/10.1016/j.scitotenv.2019.04.453 |
long_lat |
ENVELOPE(-54.464,-54.464,-61.072,-61.072) ENVELOPE(-94.941,-94.941,74.688,74.688) ENVELOPE(-95.001,-95.001,75.135,75.135) |
geographic |
Arctic Nunavut Canada Cornwallis Resolute Lake Cornwallis Island |
geographic_facet |
Arctic Nunavut Canada Cornwallis Resolute Lake Cornwallis Island |
genre |
Arctic Climate change Cornwallis Island Nunavut Salvelinus alpinus Sea ice |
genre_facet |
Arctic Climate change Cornwallis Island Nunavut Salvelinus alpinus Sea ice |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/302 doi:10.1016/j.scitotenv.2019.04.453 https://doi.org/10.1016/j.scitotenv.2019.04.453 |
op_doi |
https://doi.org/10.1016/j.scitotenv.2019.04.453 |
container_title |
Science of The Total Environment |
container_volume |
678 |
container_start_page |
801 |
op_container_end_page |
812 |
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1768381138032656384 |