The impact of calcium-rich diamond mining effluent on downstream cladoceran communities in softwater lakes of the Northwest Territories, Canada
Effluent from diamond mining operations rich in calcium (Ca) has transformed softwater tundra lakes in the Northwest Territories, Canada. Lakes downstream of the Dominion Diamond Corporation Ekati Mine have experienced marked changes in water chemistry and cladoceran community composition since esta...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Canadian Science Publishing
2018
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Online Access: | http://dx.doi.org/10.1139/cjfas-2017-0469 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2017-0469 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2017-0469 |
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crcansciencepubl:10.1139/cjfas-2017-0469 2024-06-23T07:55:42+00:00 The impact of calcium-rich diamond mining effluent on downstream cladoceran communities in softwater lakes of the Northwest Territories, Canada Griffiths, Katherine Thienpont, Joshua Jeziorski, Adam Smol, John P. 2018 http://dx.doi.org/10.1139/cjfas-2017-0469 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2017-0469 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2017-0469 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 75, issue 12, page 2221-2232 ISSN 0706-652X 1205-7533 journal-article 2018 crcansciencepubl https://doi.org/10.1139/cjfas-2017-0469 2024-06-06T04:11:16Z Effluent from diamond mining operations rich in calcium (Ca) has transformed softwater tundra lakes in the Northwest Territories, Canada. Lakes downstream of the Dominion Diamond Corporation Ekati Mine have experienced marked changes in water chemistry and cladoceran community composition since establishment of the mine in 1998. The greatest changes have occurred at the sites closest to the effluent discharge, with [Ca] increasing from <1 to >30 mg·L −1 and corresponding increases in pH from <7 to >8. A split was identified in the cladoceran communities with Holopedium glacialis (a jelly-clad cladoceran tolerant of low [Ca]) generally dominating the cladoceran community at [Ca] < 2.5 mg·L −1 , while in impacted lakes with [Ca] ≥ 2.5 mg·L −1 , Daphnia longiremis and Daphnia middendorffiana (taxa with higher [Ca] requirements) were often dominant. In contrast, the three study lakes that did not receive mining effluent maintained stable and low [Ca] (mean [Ca] = 0.66 ± 0.06 mg·L −1 (SD)) throughout the monitoring period and have not experienced directional shifts in their cladoceran communities. Article in Journal/Newspaper Northwest Territories Tundra Canadian Science Publishing Northwest Territories Canada Canadian Journal of Fisheries and Aquatic Sciences 75 12 2221 2232 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Effluent from diamond mining operations rich in calcium (Ca) has transformed softwater tundra lakes in the Northwest Territories, Canada. Lakes downstream of the Dominion Diamond Corporation Ekati Mine have experienced marked changes in water chemistry and cladoceran community composition since establishment of the mine in 1998. The greatest changes have occurred at the sites closest to the effluent discharge, with [Ca] increasing from <1 to >30 mg·L −1 and corresponding increases in pH from <7 to >8. A split was identified in the cladoceran communities with Holopedium glacialis (a jelly-clad cladoceran tolerant of low [Ca]) generally dominating the cladoceran community at [Ca] < 2.5 mg·L −1 , while in impacted lakes with [Ca] ≥ 2.5 mg·L −1 , Daphnia longiremis and Daphnia middendorffiana (taxa with higher [Ca] requirements) were often dominant. In contrast, the three study lakes that did not receive mining effluent maintained stable and low [Ca] (mean [Ca] = 0.66 ± 0.06 mg·L −1 (SD)) throughout the monitoring period and have not experienced directional shifts in their cladoceran communities. |
format |
Article in Journal/Newspaper |
author |
Griffiths, Katherine Thienpont, Joshua Jeziorski, Adam Smol, John P. |
spellingShingle |
Griffiths, Katherine Thienpont, Joshua Jeziorski, Adam Smol, John P. The impact of calcium-rich diamond mining effluent on downstream cladoceran communities in softwater lakes of the Northwest Territories, Canada |
author_facet |
Griffiths, Katherine Thienpont, Joshua Jeziorski, Adam Smol, John P. |
author_sort |
Griffiths, Katherine |
title |
The impact of calcium-rich diamond mining effluent on downstream cladoceran communities in softwater lakes of the Northwest Territories, Canada |
title_short |
The impact of calcium-rich diamond mining effluent on downstream cladoceran communities in softwater lakes of the Northwest Territories, Canada |
title_full |
The impact of calcium-rich diamond mining effluent on downstream cladoceran communities in softwater lakes of the Northwest Territories, Canada |
title_fullStr |
The impact of calcium-rich diamond mining effluent on downstream cladoceran communities in softwater lakes of the Northwest Territories, Canada |
title_full_unstemmed |
The impact of calcium-rich diamond mining effluent on downstream cladoceran communities in softwater lakes of the Northwest Territories, Canada |
title_sort |
impact of calcium-rich diamond mining effluent on downstream cladoceran communities in softwater lakes of the northwest territories, canada |
publisher |
Canadian Science Publishing |
publishDate |
2018 |
url |
http://dx.doi.org/10.1139/cjfas-2017-0469 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2017-0469 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2017-0469 |
geographic |
Northwest Territories Canada |
geographic_facet |
Northwest Territories Canada |
genre |
Northwest Territories Tundra |
genre_facet |
Northwest Territories Tundra |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 75, issue 12, page 2221-2232 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2017-0469 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
75 |
container_issue |
12 |
container_start_page |
2221 |
op_container_end_page |
2232 |
_version_ |
1802648371038519296 |