Responses of Sea-Ice Microalgae to Climatic and Fortnightly Tidal Energy Inputs (Manitounuk Sound, Hudson Bay)
Variations of sea-ice microalgae at the ice–water interface (Manitounuk Sound, Hudson Bay, Canada) were studied in relation to various energy inputs (light, tidal mixing, and heat) in April and May 1982. Seasonal photosynthetic activity does not start before the light intensity reaches 7.6 μEinst∙m...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1985
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Online Access: | http://dx.doi.org/10.1139/f85-125 http://www.nrcresearchpress.com/doi/pdf/10.1139/f85-125 |
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crcansciencepubl:10.1139/f85-125 2023-12-17T10:31:23+01:00 Responses of Sea-Ice Microalgae to Climatic and Fortnightly Tidal Energy Inputs (Manitounuk Sound, Hudson Bay) Gosselin, M. Legendre, L. Demers, S. Ingram, R. G. 1985 http://dx.doi.org/10.1139/f85-125 http://www.nrcresearchpress.com/doi/pdf/10.1139/f85-125 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 42, issue 5, page 999-1006 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1985 crcansciencepubl https://doi.org/10.1139/f85-125 2023-11-19T13:39:01Z Variations of sea-ice microalgae at the ice–water interface (Manitounuk Sound, Hudson Bay, Canada) were studied in relation to various energy inputs (light, tidal mixing, and heat) in April and May 1982. Seasonal photosynthetic activity does not start before the light intensity reaches 7.6 μEinst∙m −2 ∙s −1 . Above this value, the seasonal increase in cell numbers and chlorophyll and in the photoadaptation index (I k ) is related to the increase in underice light intensity. The sea-ice community changes from shade to light adaptation to optimize the use of ambient light energy. Photosynthetic efficiency (α B ) is mainly controlled by the fortnightly tidal vertical mixing, which governs the amount of phosphate (or of another nutrient factor) in the upper brackish layer. The ice microflora, which grows at a stable interface, takes advantage of nutrient replenishment during mixed water column conditions. We conclude that production of microalgae depends upon three forms of energy: (1) the flux of solar light, (2) the inputs of auxiliary mechanical energy (here, the fortnightly tides), and (3) the energy exchanges (here, the heat flux) responsible for the maintenance or destruction of energetic interfaces (ergoclines). Article in Journal/Newspaper Hudson Bay Manitounuk Sound Sea ice Canadian Science Publishing (via Crossref) Hudson Bay Canada Hudson Manitounuk Sound ENVELOPE(-77.416,-77.416,55.498,55.498) Canadian Journal of Fisheries and Aquatic Sciences 42 5 999 1006 |
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 Gosselin, M. Legendre, L. Demers, S. Ingram, R. G. Responses of Sea-Ice Microalgae to Climatic and Fortnightly Tidal Energy Inputs (Manitounuk Sound, Hudson Bay) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Variations of sea-ice microalgae at the ice–water interface (Manitounuk Sound, Hudson Bay, Canada) were studied in relation to various energy inputs (light, tidal mixing, and heat) in April and May 1982. Seasonal photosynthetic activity does not start before the light intensity reaches 7.6 μEinst∙m −2 ∙s −1 . Above this value, the seasonal increase in cell numbers and chlorophyll and in the photoadaptation index (I k ) is related to the increase in underice light intensity. The sea-ice community changes from shade to light adaptation to optimize the use of ambient light energy. Photosynthetic efficiency (α B ) is mainly controlled by the fortnightly tidal vertical mixing, which governs the amount of phosphate (or of another nutrient factor) in the upper brackish layer. The ice microflora, which grows at a stable interface, takes advantage of nutrient replenishment during mixed water column conditions. We conclude that production of microalgae depends upon three forms of energy: (1) the flux of solar light, (2) the inputs of auxiliary mechanical energy (here, the fortnightly tides), and (3) the energy exchanges (here, the heat flux) responsible for the maintenance or destruction of energetic interfaces (ergoclines). |
format |
Article in Journal/Newspaper |
author |
Gosselin, M. Legendre, L. Demers, S. Ingram, R. G. |
author_facet |
Gosselin, M. Legendre, L. Demers, S. Ingram, R. G. |
author_sort |
Gosselin, M. |
title |
Responses of Sea-Ice Microalgae to Climatic and Fortnightly Tidal Energy Inputs (Manitounuk Sound, Hudson Bay) |
title_short |
Responses of Sea-Ice Microalgae to Climatic and Fortnightly Tidal Energy Inputs (Manitounuk Sound, Hudson Bay) |
title_full |
Responses of Sea-Ice Microalgae to Climatic and Fortnightly Tidal Energy Inputs (Manitounuk Sound, Hudson Bay) |
title_fullStr |
Responses of Sea-Ice Microalgae to Climatic and Fortnightly Tidal Energy Inputs (Manitounuk Sound, Hudson Bay) |
title_full_unstemmed |
Responses of Sea-Ice Microalgae to Climatic and Fortnightly Tidal Energy Inputs (Manitounuk Sound, Hudson Bay) |
title_sort |
responses of sea-ice microalgae to climatic and fortnightly tidal energy inputs (manitounuk sound, hudson bay) |
publisher |
Canadian Science Publishing |
publishDate |
1985 |
url |
http://dx.doi.org/10.1139/f85-125 http://www.nrcresearchpress.com/doi/pdf/10.1139/f85-125 |
long_lat |
ENVELOPE(-77.416,-77.416,55.498,55.498) |
geographic |
Hudson Bay Canada Hudson Manitounuk Sound |
geographic_facet |
Hudson Bay Canada Hudson Manitounuk Sound |
genre |
Hudson Bay Manitounuk Sound Sea ice |
genre_facet |
Hudson Bay Manitounuk Sound Sea ice |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 42, issue 5, page 999-1006 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f85-125 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
42 |
container_issue |
5 |
container_start_page |
999 |
op_container_end_page |
1006 |
_version_ |
1785584675410935808 |