Benthic primary production in Young Sound, Northeast Greenland
The extreme and variable light climate of polar marine environments imposes a substantial limitation on benthic primary production and demands efficient adaptive capacities of the primary producers. This chapter reviews the composition, abundance, primary production and adaptive strategies of benthi...
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Danish Polar Center/Museum Tusculanum Press
2024
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ftsbaarhusojs:oai:ojs.tidsskrift.dk:article/142648 2024-01-28T10:04:01+01:00 Benthic primary production in Young Sound, Northeast Greenland Krause-Jensen, Dorthe Kühl, Michael Christensen, Peter B. Borum, Jens 2024-01-02 application/pdf https://tidsskrift.dk/meddrgroenland_biosci/article/view/142648 eng eng Danish Polar Center/Museum Tusculanum Press https://tidsskrift.dk/meddrgroenland_biosci/article/view/142648/186327 https://tidsskrift.dk/meddrgroenland_biosci/article/view/142648 Meddelelser om Grønland. Bioscience; Vol. 58 (2007): Meddelelser om Grønland. Bioscience; 160-173 Meddelelser om Grønland. Bioscience; Årg. 58 (2007): Meddelelser om Grønland. Bioscience; 160-173 0106-1054 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2024 ftsbaarhusojs 2024-01-03T23:59:24Z The extreme and variable light climate of polar marine environments imposes a substantial limitation on benthic primary production and demands efficient adaptive capacities of the primary producers. This chapter reviews the composition, abundance, primary production and adaptive strategies of benthic primary producers in Young Sound. Benthic primary producers occurred in the 0-50 m depth range and the relative importance of microalgae, crustose coralline macroalgae and foliose macroalgae varied systematically with depth. On a summer day with optimal light conditions benthic primary production showed a maximum of c. 70 mmol O2 m-2 d-1 in shallow water. Production rates declined gradually to c. 20 mmol O2 m-2 d-1at 10–20 m depth and to 2.5 mmol O2 m-2 d-1 at 30 m depth. Foliose macroalgae contributed markedly to primary production in shallow water but became insignificant at water depths >15 m, while benthic diatoms contributed most to primary production at intermediate water depths (5-30 m). At water depths greater than 30 m only coralline algae occurred, but their production was low because of their low abundance, low Pmax and the low ambient irradiance at those depths. All algal groups were well adapted to the ambient irradiance and could, within minutes, acclimate their photosynthetic performance to changing light conditions. The benthic primary production in Young Sound markedly surpassed the pelagic primary production down to water depths of 20 m and the results thereby underline the potential importance of benthic primary production in shallow-water Arctic ecosystems. Article in Journal/Newspaper Arctic Greenland Aarhus University: OJS at The State and University Library Arctic Greenland |
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Open Polar |
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Aarhus University: OJS at The State and University Library |
op_collection_id |
ftsbaarhusojs |
language |
English |
description |
The extreme and variable light climate of polar marine environments imposes a substantial limitation on benthic primary production and demands efficient adaptive capacities of the primary producers. This chapter reviews the composition, abundance, primary production and adaptive strategies of benthic primary producers in Young Sound. Benthic primary producers occurred in the 0-50 m depth range and the relative importance of microalgae, crustose coralline macroalgae and foliose macroalgae varied systematically with depth. On a summer day with optimal light conditions benthic primary production showed a maximum of c. 70 mmol O2 m-2 d-1 in shallow water. Production rates declined gradually to c. 20 mmol O2 m-2 d-1at 10–20 m depth and to 2.5 mmol O2 m-2 d-1 at 30 m depth. Foliose macroalgae contributed markedly to primary production in shallow water but became insignificant at water depths >15 m, while benthic diatoms contributed most to primary production at intermediate water depths (5-30 m). At water depths greater than 30 m only coralline algae occurred, but their production was low because of their low abundance, low Pmax and the low ambient irradiance at those depths. All algal groups were well adapted to the ambient irradiance and could, within minutes, acclimate their photosynthetic performance to changing light conditions. The benthic primary production in Young Sound markedly surpassed the pelagic primary production down to water depths of 20 m and the results thereby underline the potential importance of benthic primary production in shallow-water Arctic ecosystems. |
format |
Article in Journal/Newspaper |
author |
Krause-Jensen, Dorthe Kühl, Michael Christensen, Peter B. Borum, Jens |
spellingShingle |
Krause-Jensen, Dorthe Kühl, Michael Christensen, Peter B. Borum, Jens Benthic primary production in Young Sound, Northeast Greenland |
author_facet |
Krause-Jensen, Dorthe Kühl, Michael Christensen, Peter B. Borum, Jens |
author_sort |
Krause-Jensen, Dorthe |
title |
Benthic primary production in Young Sound, Northeast Greenland |
title_short |
Benthic primary production in Young Sound, Northeast Greenland |
title_full |
Benthic primary production in Young Sound, Northeast Greenland |
title_fullStr |
Benthic primary production in Young Sound, Northeast Greenland |
title_full_unstemmed |
Benthic primary production in Young Sound, Northeast Greenland |
title_sort |
benthic primary production in young sound, northeast greenland |
publisher |
Danish Polar Center/Museum Tusculanum Press |
publishDate |
2024 |
url |
https://tidsskrift.dk/meddrgroenland_biosci/article/view/142648 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
Meddelelser om Grønland. Bioscience; Vol. 58 (2007): Meddelelser om Grønland. Bioscience; 160-173 Meddelelser om Grønland. Bioscience; Årg. 58 (2007): Meddelelser om Grønland. Bioscience; 160-173 0106-1054 |
op_relation |
https://tidsskrift.dk/meddrgroenland_biosci/article/view/142648/186327 https://tidsskrift.dk/meddrgroenland_biosci/article/view/142648 |
_version_ |
1789329607641530368 |