Impact of Ice Algae on Inorganic Nutrients in Seawater and Sea Ice in Barrow Strait, NWT, Canada, During Spring
Except in "bottom ice" (lowest few centimetres) and surface waters impacted by autotrophs, the major inorganic nutrients behave conservatively in seawater and sea ice. From mid- to late spring, steep and persistent nutrient gradients were observed in the "well-mixed surface layer"...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1990
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Online Access: | http://dx.doi.org/10.1139/f90-159 http://www.nrcresearchpress.com/doi/pdf/10.1139/f90-159 |
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crcansciencepubl:10.1139/f90-159 2024-06-23T07:53:37+00:00 Impact of Ice Algae on Inorganic Nutrients in Seawater and Sea Ice in Barrow Strait, NWT, Canada, During Spring Cota, Glenn F. Anning, Jeffrey L. Harris, Leslie R. Harrison, W. Glen Smith, Ralph E. H. 1990 http://dx.doi.org/10.1139/f90-159 http://www.nrcresearchpress.com/doi/pdf/10.1139/f90-159 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 47, issue 7, page 1402-1415 ISSN 0706-652X 1205-7533 journal-article 1990 crcansciencepubl https://doi.org/10.1139/f90-159 2024-06-06T04:11:16Z Except in "bottom ice" (lowest few centimetres) and surface waters impacted by autotrophs, the major inorganic nutrients behave conservatively in seawater and sea ice. From mid- to late spring, steep and persistent nutrient gradients were observed in the "well-mixed surface layer" with minima near the ice–water interface. Nitrate, ammonium, and phosphate are highly concentrated in heavily colonized bottom ice relative to seawater and the remainder of the ice sheet; concentrations in darkened, weakly colonized bottom ice are similar to the ice sheet. These nutrients also display strong vertical stratification over millimetre scales. Nitrate and phosphate in the bottom ice layer display strong positive relationships with chlorophyll. The accumulation of these nutrients in bottom ice must be biologically mediated and constitutes a significant sink. In contrast, silicic acid concentrations in bottom ice are close to those expected for sea ice formed from the source seawater, are only weakly related to algal biomass, and vary much less seasonally. Ice algae are apparently shocked osmotically and release their intracellular pools of dissolved nutrients. Intracellular pools of nitrate averaged 1.4–9.5% of total particulate nitrogen. Nitrient stresses, during periods of high biomass and sluggish supply, may be alleviated by pooling. Article in Journal/Newspaper ice algae Ice Sheet Sea ice Canadian Science Publishing Barrow Strait ENVELOPE(-94.168,-94.168,74.402,74.402) Canada Canadian Journal of Fisheries and Aquatic Sciences 47 7 1402 1415 |
institution |
Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Except in "bottom ice" (lowest few centimetres) and surface waters impacted by autotrophs, the major inorganic nutrients behave conservatively in seawater and sea ice. From mid- to late spring, steep and persistent nutrient gradients were observed in the "well-mixed surface layer" with minima near the ice–water interface. Nitrate, ammonium, and phosphate are highly concentrated in heavily colonized bottom ice relative to seawater and the remainder of the ice sheet; concentrations in darkened, weakly colonized bottom ice are similar to the ice sheet. These nutrients also display strong vertical stratification over millimetre scales. Nitrate and phosphate in the bottom ice layer display strong positive relationships with chlorophyll. The accumulation of these nutrients in bottom ice must be biologically mediated and constitutes a significant sink. In contrast, silicic acid concentrations in bottom ice are close to those expected for sea ice formed from the source seawater, are only weakly related to algal biomass, and vary much less seasonally. Ice algae are apparently shocked osmotically and release their intracellular pools of dissolved nutrients. Intracellular pools of nitrate averaged 1.4–9.5% of total particulate nitrogen. Nitrient stresses, during periods of high biomass and sluggish supply, may be alleviated by pooling. |
format |
Article in Journal/Newspaper |
author |
Cota, Glenn F. Anning, Jeffrey L. Harris, Leslie R. Harrison, W. Glen Smith, Ralph E. H. |
spellingShingle |
Cota, Glenn F. Anning, Jeffrey L. Harris, Leslie R. Harrison, W. Glen Smith, Ralph E. H. Impact of Ice Algae on Inorganic Nutrients in Seawater and Sea Ice in Barrow Strait, NWT, Canada, During Spring |
author_facet |
Cota, Glenn F. Anning, Jeffrey L. Harris, Leslie R. Harrison, W. Glen Smith, Ralph E. H. |
author_sort |
Cota, Glenn F. |
title |
Impact of Ice Algae on Inorganic Nutrients in Seawater and Sea Ice in Barrow Strait, NWT, Canada, During Spring |
title_short |
Impact of Ice Algae on Inorganic Nutrients in Seawater and Sea Ice in Barrow Strait, NWT, Canada, During Spring |
title_full |
Impact of Ice Algae on Inorganic Nutrients in Seawater and Sea Ice in Barrow Strait, NWT, Canada, During Spring |
title_fullStr |
Impact of Ice Algae on Inorganic Nutrients in Seawater and Sea Ice in Barrow Strait, NWT, Canada, During Spring |
title_full_unstemmed |
Impact of Ice Algae on Inorganic Nutrients in Seawater and Sea Ice in Barrow Strait, NWT, Canada, During Spring |
title_sort |
impact of ice algae on inorganic nutrients in seawater and sea ice in barrow strait, nwt, canada, during spring |
publisher |
Canadian Science Publishing |
publishDate |
1990 |
url |
http://dx.doi.org/10.1139/f90-159 http://www.nrcresearchpress.com/doi/pdf/10.1139/f90-159 |
long_lat |
ENVELOPE(-94.168,-94.168,74.402,74.402) |
geographic |
Barrow Strait Canada |
geographic_facet |
Barrow Strait Canada |
genre |
ice algae Ice Sheet Sea ice |
genre_facet |
ice algae Ice Sheet Sea ice |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 47, issue 7, page 1402-1415 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f90-159 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
47 |
container_issue |
7 |
container_start_page |
1402 |
op_container_end_page |
1415 |
_version_ |
1802645352575139840 |