Experimental Studies on the Effect of Arsenic on Microbial Degradation of Organic Matter and Algal Growth
Experiments were performed in tubes in Lake 303 at the Experimental Lakes Area to determine the effects of arsenate and arsenite on microbial degradation of organic matter, and to determine rates of reduction and oxidation of inorganic arsenic. Under winter ice, 40 μmol∙L −1 arsenate or arsenite inh...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1980
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Online Access: | http://dx.doi.org/10.1139/f80-055 http://www.nrcresearchpress.com/doi/pdf/10.1139/f80-055 |
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crcansciencepubl:10.1139/f80-055 2024-04-28T08:41:23+00:00 Experimental Studies on the Effect of Arsenic on Microbial Degradation of Organic Matter and Algal Growth Brunskill, G. J. Graham, B. W. Rudd, J. W. M. 1980 http://dx.doi.org/10.1139/f80-055 http://www.nrcresearchpress.com/doi/pdf/10.1139/f80-055 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 37, issue 3, page 415-423 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1980 crcansciencepubl https://doi.org/10.1139/f80-055 2024-04-09T06:56:27Z Experiments were performed in tubes in Lake 303 at the Experimental Lakes Area to determine the effects of arsenate and arsenite on microbial degradation of organic matter, and to determine rates of reduction and oxidation of inorganic arsenic. Under winter ice, 40 μmol∙L −1 arsenate or arsenite inhibited microbial degradation of organic matter by 50%. Rates of oxidation of arsenite were about 2 μmol∙L −1 ∙d −1 under aerobic conditions, and rates of reduction of arsenate were about 1 μmol∙L −1 ∙d −1 under anaerobic conditions. During the ice-free season, arsenate and arsenite had little apparent effect upon rates of degradation of organic matter in lake tubes enriched with nutrients. Rates of formation of particulate phosphorus, and rates of planktonic uptake of dissolved phosphorus were depressed in the presence of arsenic. The observed rate of oxidation of arsenite in summer was similar to the winter value. Arsenate reduction rates ([Formula: see text]30 μmol∙L −1 ∙d −1 ) were very rapid under short periods of anaerobiosis. In the presence of large nutrient (N, P) concentrations, As did not inhibit the development of high algal biomass.Based on these experiments, we predict that addition of domestic sewage to arsenate-polluted Kam Lake (near Yellowknife, N.W.T.) will result in a state of restrained eutrophication. Degradation of organic matter will not be inhibited by As in summer, and dissolved phosphorus concentrations will remain high, due to As inhibition of P uptake by the plankton. During the summer, growth of algal blooms may be moderated by As, and more dissolved phosphorus will flow out of the lake to downstream waterbodies.Key words: arsenic, bacteria, algae, organic matter decomposition, eutrophication Article in Journal/Newspaper Yellowknife Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 37 3 415 423 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Brunskill, G. J. Graham, B. W. Rudd, J. W. M. Experimental Studies on the Effect of Arsenic on Microbial Degradation of Organic Matter and Algal Growth |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Experiments were performed in tubes in Lake 303 at the Experimental Lakes Area to determine the effects of arsenate and arsenite on microbial degradation of organic matter, and to determine rates of reduction and oxidation of inorganic arsenic. Under winter ice, 40 μmol∙L −1 arsenate or arsenite inhibited microbial degradation of organic matter by 50%. Rates of oxidation of arsenite were about 2 μmol∙L −1 ∙d −1 under aerobic conditions, and rates of reduction of arsenate were about 1 μmol∙L −1 ∙d −1 under anaerobic conditions. During the ice-free season, arsenate and arsenite had little apparent effect upon rates of degradation of organic matter in lake tubes enriched with nutrients. Rates of formation of particulate phosphorus, and rates of planktonic uptake of dissolved phosphorus were depressed in the presence of arsenic. The observed rate of oxidation of arsenite in summer was similar to the winter value. Arsenate reduction rates ([Formula: see text]30 μmol∙L −1 ∙d −1 ) were very rapid under short periods of anaerobiosis. In the presence of large nutrient (N, P) concentrations, As did not inhibit the development of high algal biomass.Based on these experiments, we predict that addition of domestic sewage to arsenate-polluted Kam Lake (near Yellowknife, N.W.T.) will result in a state of restrained eutrophication. Degradation of organic matter will not be inhibited by As in summer, and dissolved phosphorus concentrations will remain high, due to As inhibition of P uptake by the plankton. During the summer, growth of algal blooms may be moderated by As, and more dissolved phosphorus will flow out of the lake to downstream waterbodies.Key words: arsenic, bacteria, algae, organic matter decomposition, eutrophication |
format |
Article in Journal/Newspaper |
author |
Brunskill, G. J. Graham, B. W. Rudd, J. W. M. |
author_facet |
Brunskill, G. J. Graham, B. W. Rudd, J. W. M. |
author_sort |
Brunskill, G. J. |
title |
Experimental Studies on the Effect of Arsenic on Microbial Degradation of Organic Matter and Algal Growth |
title_short |
Experimental Studies on the Effect of Arsenic on Microbial Degradation of Organic Matter and Algal Growth |
title_full |
Experimental Studies on the Effect of Arsenic on Microbial Degradation of Organic Matter and Algal Growth |
title_fullStr |
Experimental Studies on the Effect of Arsenic on Microbial Degradation of Organic Matter and Algal Growth |
title_full_unstemmed |
Experimental Studies on the Effect of Arsenic on Microbial Degradation of Organic Matter and Algal Growth |
title_sort |
experimental studies on the effect of arsenic on microbial degradation of organic matter and algal growth |
publisher |
Canadian Science Publishing |
publishDate |
1980 |
url |
http://dx.doi.org/10.1139/f80-055 http://www.nrcresearchpress.com/doi/pdf/10.1139/f80-055 |
genre |
Yellowknife |
genre_facet |
Yellowknife |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 37, issue 3, page 415-423 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f80-055 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
37 |
container_issue |
3 |
container_start_page |
415 |
op_container_end_page |
423 |
_version_ |
1797571648992313344 |