Community dynamics of bottom-ice algae in Dease Strait of the Canadian Arctic
Sea ice algae are a characteristic feature in ice-covered seas, contributing a significant fraction of the total primary production in many areas and providing a concentrated food source of high nutritional value to grazers in the spring. Algae respond to physical changes in the sea ice environment...
Published in: | Progress in Oceanography |
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Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2016
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Online Access: | https://hdl.handle.net/1983/9124256d-5ffc-40ab-8257-ab2337ae6593 https://research-information.bris.ac.uk/en/publications/9124256d-5ffc-40ab-8257-ab2337ae6593 https://doi.org/10.1016/j.pocean.2016.10.005 https://research-information.bris.ac.uk/ws/files/144396659/ProgressOceanography_Campbell_Landy_104547107.pdf |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/9124256d-5ffc-40ab-8257-ab2337ae6593 2024-05-19T07:33:11+00:00 Community dynamics of bottom-ice algae in Dease Strait of the Canadian Arctic Campbell, K. Mundy, C. J. Landy, J. C. Delaforge, A. Michel, C. Rysgaard, S. 2016-12 application/pdf https://hdl.handle.net/1983/9124256d-5ffc-40ab-8257-ab2337ae6593 https://research-information.bris.ac.uk/en/publications/9124256d-5ffc-40ab-8257-ab2337ae6593 https://doi.org/10.1016/j.pocean.2016.10.005 https://research-information.bris.ac.uk/ws/files/144396659/ProgressOceanography_Campbell_Landy_104547107.pdf eng eng https://research-information.bris.ac.uk/en/publications/9124256d-5ffc-40ab-8257-ab2337ae6593 info:eu-repo/semantics/openAccess Campbell , K , Mundy , C J , Landy , J C , Delaforge , A , Michel , C & Rysgaard , S 2016 , ' Community dynamics of bottom-ice algae in Dease Strait of the Canadian Arctic ' , Progress in Oceanography , vol. 149 , pp. 27-39 . https://doi.org/10.1016/j.pocean.2016.10.005 Algology Arctic zone Nutrients Oxygen Photoadaptation Sea ice article 2016 ftubristolcris https://doi.org/10.1016/j.pocean.2016.10.005 2024-04-23T23:53:50Z Sea ice algae are a characteristic feature in ice-covered seas, contributing a significant fraction of the total primary production in many areas and providing a concentrated food source of high nutritional value to grazers in the spring. Algae respond to physical changes in the sea ice environment by modifying their cellular carbon, nitrogen and pigment content, and by adjusting their photophysiological characteristics. In this study we examined how the ratios of particulate organic carbon (POC) to nitrogen (PON), and POC to chlorophyll a (chl a), responded to the evolving snow-covered sea ice environment near Cambridge Bay, Nunavut, during spring 2014. We also estimated photosynthesis-irradiance (PI) curves using oxygen-optodes and evaluated the resulting time-series of PI parameters under thin and thick snow-covered sites. There were no significant differences in PI parameters between samples from different overlying snow depths, and only the maximum photosynthetic rates in the absence of photoinhibition (P s B ) and photoacclimation (I S ) parameters changed significantly over the spring bloom. Furthermore, we found that both these parameters increased over time in response to increasing percent transmission of photosynthetically active radiation (T PAR ) through the ice, indicating that light was a limiting factor of photosynthesis and was an important driver of temporal (over the spring) rather than spatial (between snow depths) variability in photophysiological response. However, we note that spatial variability in primary production was evident. Higher T PAR over the spring and under thin snow affected the composition of algae over both time and space, causing greater POC:chl a estimates in late spring and under thin snow cover. Nitrogen limitation was pronounced in this study, likely reducing P s B and algal photosynthetic rates, and increasing POC:PON ratios to over six times the Redfield average. Our results highlight the influence of both light and nutrients on ice algal biomass composition and ... Article in Journal/Newspaper Arctic Arctic Cambridge Bay ice algae Nunavut Sea ice University of Bristol: Bristol Research Progress in Oceanography 149 27 39 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
topic |
Algology Arctic zone Nutrients Oxygen Photoadaptation Sea ice |
spellingShingle |
Algology Arctic zone Nutrients Oxygen Photoadaptation Sea ice Campbell, K. Mundy, C. J. Landy, J. C. Delaforge, A. Michel, C. Rysgaard, S. Community dynamics of bottom-ice algae in Dease Strait of the Canadian Arctic |
topic_facet |
Algology Arctic zone Nutrients Oxygen Photoadaptation Sea ice |
description |
Sea ice algae are a characteristic feature in ice-covered seas, contributing a significant fraction of the total primary production in many areas and providing a concentrated food source of high nutritional value to grazers in the spring. Algae respond to physical changes in the sea ice environment by modifying their cellular carbon, nitrogen and pigment content, and by adjusting their photophysiological characteristics. In this study we examined how the ratios of particulate organic carbon (POC) to nitrogen (PON), and POC to chlorophyll a (chl a), responded to the evolving snow-covered sea ice environment near Cambridge Bay, Nunavut, during spring 2014. We also estimated photosynthesis-irradiance (PI) curves using oxygen-optodes and evaluated the resulting time-series of PI parameters under thin and thick snow-covered sites. There were no significant differences in PI parameters between samples from different overlying snow depths, and only the maximum photosynthetic rates in the absence of photoinhibition (P s B ) and photoacclimation (I S ) parameters changed significantly over the spring bloom. Furthermore, we found that both these parameters increased over time in response to increasing percent transmission of photosynthetically active radiation (T PAR ) through the ice, indicating that light was a limiting factor of photosynthesis and was an important driver of temporal (over the spring) rather than spatial (between snow depths) variability in photophysiological response. However, we note that spatial variability in primary production was evident. Higher T PAR over the spring and under thin snow affected the composition of algae over both time and space, causing greater POC:chl a estimates in late spring and under thin snow cover. Nitrogen limitation was pronounced in this study, likely reducing P s B and algal photosynthetic rates, and increasing POC:PON ratios to over six times the Redfield average. Our results highlight the influence of both light and nutrients on ice algal biomass composition and ... |
format |
Article in Journal/Newspaper |
author |
Campbell, K. Mundy, C. J. Landy, J. C. Delaforge, A. Michel, C. Rysgaard, S. |
author_facet |
Campbell, K. Mundy, C. J. Landy, J. C. Delaforge, A. Michel, C. Rysgaard, S. |
author_sort |
Campbell, K. |
title |
Community dynamics of bottom-ice algae in Dease Strait of the Canadian Arctic |
title_short |
Community dynamics of bottom-ice algae in Dease Strait of the Canadian Arctic |
title_full |
Community dynamics of bottom-ice algae in Dease Strait of the Canadian Arctic |
title_fullStr |
Community dynamics of bottom-ice algae in Dease Strait of the Canadian Arctic |
title_full_unstemmed |
Community dynamics of bottom-ice algae in Dease Strait of the Canadian Arctic |
title_sort |
community dynamics of bottom-ice algae in dease strait of the canadian arctic |
publishDate |
2016 |
url |
https://hdl.handle.net/1983/9124256d-5ffc-40ab-8257-ab2337ae6593 https://research-information.bris.ac.uk/en/publications/9124256d-5ffc-40ab-8257-ab2337ae6593 https://doi.org/10.1016/j.pocean.2016.10.005 https://research-information.bris.ac.uk/ws/files/144396659/ProgressOceanography_Campbell_Landy_104547107.pdf |
genre |
Arctic Arctic Cambridge Bay ice algae Nunavut Sea ice |
genre_facet |
Arctic Arctic Cambridge Bay ice algae Nunavut Sea ice |
op_source |
Campbell , K , Mundy , C J , Landy , J C , Delaforge , A , Michel , C & Rysgaard , S 2016 , ' Community dynamics of bottom-ice algae in Dease Strait of the Canadian Arctic ' , Progress in Oceanography , vol. 149 , pp. 27-39 . https://doi.org/10.1016/j.pocean.2016.10.005 |
op_relation |
https://research-information.bris.ac.uk/en/publications/9124256d-5ffc-40ab-8257-ab2337ae6593 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.pocean.2016.10.005 |
container_title |
Progress in Oceanography |
container_volume |
149 |
container_start_page |
27 |
op_container_end_page |
39 |
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1799471293370728448 |