Predicting Fish Mercury Levels from Physical Characteristics of Boreal Reservoirs
Reservoir formation has often resulted in increased fish mercury levels. Predicting the potential for increase prior to impoundment would be useful in future environmental impact assessment.. We developed several linear models relating mercury burdens of northern pike (Esox lucius), walleye (Stizost...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1991
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Online Access: | http://dx.doi.org/10.1139/f91-174 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-174 |
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crcansciencepubl:10.1139/f91-174 2023-12-17T10:28:51+01:00 Predicting Fish Mercury Levels from Physical Characteristics of Boreal Reservoirs Johnston, Thomas A. Bodaly, R. A. Mathias, J. A. 1991 http://dx.doi.org/10.1139/f91-174 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-174 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 8, page 1468-1475 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1991 crcansciencepubl https://doi.org/10.1139/f91-174 2023-11-19T13:38:51Z Reservoir formation has often resulted in increased fish mercury levels. Predicting the potential for increase prior to impoundment would be useful in future environmental impact assessment.. We developed several linear models relating mercury burdens of northern pike (Esox lucius), walleye (Stizostedion vitreum), and lake whitefish (Coregonus clupeaformis) to physical characteristics of 21 lakes and reservoirs in the Churchill River diversion region of northern Manitoba. Ratios of flooded terrestrial area to water volume of the reservoir itself (within-lake effects) and of inflowing waters (upstream effects) were able to explain 76–84% of the variation in mean mercury burden. Upstream effects consistently accounted for more variation than within-lake effects. We tested these models using data from 18 Canadian lakes and reservoirs. Manitoba reservoirs generally fit the models well. The largest deviations of observed mercury levels from predicted mercury levels were for reservoirs of northern Quebec and Labrador We attribute this to differences in the relative contributions of within-lake effects and upstream effects between reservoirs of this region and those used to build the models. Future models should refine the relative contributions of these two components for individual reservoirs. Article in Journal/Newspaper Churchill Churchill River Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 48 8 1468 1475 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Johnston, Thomas A. Bodaly, R. A. Mathias, J. A. Predicting Fish Mercury Levels from Physical Characteristics of Boreal Reservoirs |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Reservoir formation has often resulted in increased fish mercury levels. Predicting the potential for increase prior to impoundment would be useful in future environmental impact assessment.. We developed several linear models relating mercury burdens of northern pike (Esox lucius), walleye (Stizostedion vitreum), and lake whitefish (Coregonus clupeaformis) to physical characteristics of 21 lakes and reservoirs in the Churchill River diversion region of northern Manitoba. Ratios of flooded terrestrial area to water volume of the reservoir itself (within-lake effects) and of inflowing waters (upstream effects) were able to explain 76–84% of the variation in mean mercury burden. Upstream effects consistently accounted for more variation than within-lake effects. We tested these models using data from 18 Canadian lakes and reservoirs. Manitoba reservoirs generally fit the models well. The largest deviations of observed mercury levels from predicted mercury levels were for reservoirs of northern Quebec and Labrador We attribute this to differences in the relative contributions of within-lake effects and upstream effects between reservoirs of this region and those used to build the models. Future models should refine the relative contributions of these two components for individual reservoirs. |
format |
Article in Journal/Newspaper |
author |
Johnston, Thomas A. Bodaly, R. A. Mathias, J. A. |
author_facet |
Johnston, Thomas A. Bodaly, R. A. Mathias, J. A. |
author_sort |
Johnston, Thomas A. |
title |
Predicting Fish Mercury Levels from Physical Characteristics of Boreal Reservoirs |
title_short |
Predicting Fish Mercury Levels from Physical Characteristics of Boreal Reservoirs |
title_full |
Predicting Fish Mercury Levels from Physical Characteristics of Boreal Reservoirs |
title_fullStr |
Predicting Fish Mercury Levels from Physical Characteristics of Boreal Reservoirs |
title_full_unstemmed |
Predicting Fish Mercury Levels from Physical Characteristics of Boreal Reservoirs |
title_sort |
predicting fish mercury levels from physical characteristics of boreal reservoirs |
publisher |
Canadian Science Publishing |
publishDate |
1991 |
url |
http://dx.doi.org/10.1139/f91-174 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-174 |
genre |
Churchill Churchill River |
genre_facet |
Churchill Churchill River |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 8, page 1468-1475 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f91-174 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
48 |
container_issue |
8 |
container_start_page |
1468 |
op_container_end_page |
1475 |
_version_ |
1785581054762942464 |