Geochemistry of Quebec North Shore Salmon Rivers during Snowmelt: Organic Acid Pulse and Aluminum Mobilization
The episodic acidification of three salmon rivers on the Quebec North Shore during spring snowmelt is shown to result mainly from increased inputs of organic acids rather than strong mineral acids. Appreciable mobilization of Al occurs during the spring pH depression, accompanied by marked changes i...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1992
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Online Access: | http://dx.doi.org/10.1139/f92-215 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-215 |
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crcansciencepubl:10.1139/f92-215 2024-09-09T19:30:46+00:00 Geochemistry of Quebec North Shore Salmon Rivers during Snowmelt: Organic Acid Pulse and Aluminum Mobilization Campbell, Peter G. C. Hansen, Hans J. Dubreuil, Bertrand Nelson, William O. 1992 http://dx.doi.org/10.1139/f92-215 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-215 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 9, page 1938-1952 ISSN 0706-652X 1205-7533 journal-article 1992 crcansciencepubl https://doi.org/10.1139/f92-215 2024-08-01T04:10:00Z The episodic acidification of three salmon rivers on the Quebec North Shore during spring snowmelt is shown to result mainly from increased inputs of organic acids rather than strong mineral acids. Appreciable mobilization of Al occurs during the spring pH depression, accompanied by marked changes in Al speciation. Saturation indices, calculated for each river with respect to microcrystalline gibbsite (K SO = 10 −9.35 ), approach saturation for samples collected before or after the snowmelt period, but during maximum discharge, marked undersaturation is observed. Seasonal differences in Al–dissolved organic carbon (DOC) interactions were also noted. Outside the snowmelt period, a linear logarithmic model proved successful in predicting concentrations of monomeric organic Al ([Al-org] = 3.55∙10 −3 ∙{Al 3+ } 0.129 ∙{H + } 0 ∙[DOC] 0.91 n = 19, r 2 = 0.92), but during snowmelt, this model greatly overestimated [Al-org]. The failure of the model during this critical period is attributed to the presence in the spring DOC peak of an appreciable nonhumic (and non-Al-binding) component. Although concentrations of monomeric inorganic Al (notably fluoro–Al complexes) increase during the spring pH depression, levels do not appear to attain the thresholds for Al and H + toxicity reported for juvenile Atlantic salmon (Salmo salar). Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 49 9 1938 1952 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
The episodic acidification of three salmon rivers on the Quebec North Shore during spring snowmelt is shown to result mainly from increased inputs of organic acids rather than strong mineral acids. Appreciable mobilization of Al occurs during the spring pH depression, accompanied by marked changes in Al speciation. Saturation indices, calculated for each river with respect to microcrystalline gibbsite (K SO = 10 −9.35 ), approach saturation for samples collected before or after the snowmelt period, but during maximum discharge, marked undersaturation is observed. Seasonal differences in Al–dissolved organic carbon (DOC) interactions were also noted. Outside the snowmelt period, a linear logarithmic model proved successful in predicting concentrations of monomeric organic Al ([Al-org] = 3.55∙10 −3 ∙{Al 3+ } 0.129 ∙{H + } 0 ∙[DOC] 0.91 n = 19, r 2 = 0.92), but during snowmelt, this model greatly overestimated [Al-org]. The failure of the model during this critical period is attributed to the presence in the spring DOC peak of an appreciable nonhumic (and non-Al-binding) component. Although concentrations of monomeric inorganic Al (notably fluoro–Al complexes) increase during the spring pH depression, levels do not appear to attain the thresholds for Al and H + toxicity reported for juvenile Atlantic salmon (Salmo salar). |
format |
Article in Journal/Newspaper |
author |
Campbell, Peter G. C. Hansen, Hans J. Dubreuil, Bertrand Nelson, William O. |
spellingShingle |
Campbell, Peter G. C. Hansen, Hans J. Dubreuil, Bertrand Nelson, William O. Geochemistry of Quebec North Shore Salmon Rivers during Snowmelt: Organic Acid Pulse and Aluminum Mobilization |
author_facet |
Campbell, Peter G. C. Hansen, Hans J. Dubreuil, Bertrand Nelson, William O. |
author_sort |
Campbell, Peter G. C. |
title |
Geochemistry of Quebec North Shore Salmon Rivers during Snowmelt: Organic Acid Pulse and Aluminum Mobilization |
title_short |
Geochemistry of Quebec North Shore Salmon Rivers during Snowmelt: Organic Acid Pulse and Aluminum Mobilization |
title_full |
Geochemistry of Quebec North Shore Salmon Rivers during Snowmelt: Organic Acid Pulse and Aluminum Mobilization |
title_fullStr |
Geochemistry of Quebec North Shore Salmon Rivers during Snowmelt: Organic Acid Pulse and Aluminum Mobilization |
title_full_unstemmed |
Geochemistry of Quebec North Shore Salmon Rivers during Snowmelt: Organic Acid Pulse and Aluminum Mobilization |
title_sort |
geochemistry of quebec north shore salmon rivers during snowmelt: organic acid pulse and aluminum mobilization |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/f92-215 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-215 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 9, page 1938-1952 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f92-215 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
49 |
container_issue |
9 |
container_start_page |
1938 |
op_container_end_page |
1952 |
_version_ |
1809899740786065408 |