PHOTOPHYSIOLOGICAL EVIDENCE OF NUTRIENT LIMITATION OF PLATELET ICE ALGAE IN MCMURDO SOUND, ANTARCTICA
Seasonally changing photophysiological and biochemical characteristics of sea ice microalgae are interpreted with respect to light availability and measurements of nutrient concentration made at high vertical resolution (12.5 cm) during a dense bloom in the platelet ice layer of McMurdo Sound during...
Published in: | Journal of Phycology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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1998
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Online Access: | http://dx.doi.org/10.1046/j.1529-8817.1998.340788.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1529-8817.1998.340788.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1529-8817.1998.340788.x |
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crwiley:10.1046/j.1529-8817.1998.340788.x 2024-06-02T07:56:48+00:00 PHOTOPHYSIOLOGICAL EVIDENCE OF NUTRIENT LIMITATION OF PLATELET ICE ALGAE IN MCMURDO SOUND, ANTARCTICA Robinson, Dale H. Arrigo, Kevin R. Kolber, Zbigniew Gosselin, Michel Sullivan, Cornelius W. 1998 http://dx.doi.org/10.1046/j.1529-8817.1998.340788.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1529-8817.1998.340788.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1529-8817.1998.340788.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Phycology volume 34, issue 5, page 788-797 ISSN 0022-3646 1529-8817 journal-article 1998 crwiley https://doi.org/10.1046/j.1529-8817.1998.340788.x 2024-05-03T11:13:48Z Seasonally changing photophysiological and biochemical characteristics of sea ice microalgae are interpreted with respect to light availability and measurements of nutrient concentration made at high vertical resolution (12.5 cm) during a dense bloom in the platelet ice layer of McMurdo Sound during a 6‐week study in austral spring of 1989. Platelet ice algae remained highly shade adapted throughout the spring as shown by their low photoadaptive index (E k , 3.7–8.4 μmol photons·m −2 ·s −1 ), low mean specific absorption coefficient (<0.009 m 2 mg −1 Chl a ), high optical cross‐sectional area of photosystem II (σ PSII, 3.0–8.2), and high molar ratio of fucoxanthin:chlorophyll a (mean = 1.62 ± 0.15 SD). Between 24 October and 8 November, the algae exhibited a photoacclimative response that was marked by a 30% decrease in photosynthetic efficiency (α B ), a 75% decrease in maximum photosynthetic rate (P B/ m ), and a 60% increase in σ PSII . The photochemical conversion efficiency at photosystem II (F v /F m = ca. 0.5) and the quantum yield of photosynthesis (Ø C = 0.062– 0.078 mol C mol −1 photons) were ca. 80% of their maximal values. After 8 November, changes in algal photophysiology and biochemistry, which were inconsistent with a photoacclimation response, suggest that the platelet ice algae near the platelet/congelation ice interface became increasingly nutrient limited. The number of pennate diatoms increased threefold to 150 × 10 9 cells m −3 between 8 and 14 November, then remained unchanged throughout the remainder of the field season. Following the increase in cell number, F v /F m , Ø C , and C:Chl a decreased by >40%, σ PSII increased by 70%; and the biochemical ratios C:N and C:Si increased 25%–30%. Nutrient depletion was apparent from the high‐resolution vertical profiles, but nutrient concentrations limiting algal growth were not observed. However, nutrient concentrations at the likely site of nutrient limitation near the platelet/congelation ice interface were not measured, indicating that ... Article in Journal/Newspaper Antarc* Antarctica ice algae McMurdo Sound Sea ice Wiley Online Library Austral McMurdo Sound Journal of Phycology 34 5 788 797 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Seasonally changing photophysiological and biochemical characteristics of sea ice microalgae are interpreted with respect to light availability and measurements of nutrient concentration made at high vertical resolution (12.5 cm) during a dense bloom in the platelet ice layer of McMurdo Sound during a 6‐week study in austral spring of 1989. Platelet ice algae remained highly shade adapted throughout the spring as shown by their low photoadaptive index (E k , 3.7–8.4 μmol photons·m −2 ·s −1 ), low mean specific absorption coefficient (<0.009 m 2 mg −1 Chl a ), high optical cross‐sectional area of photosystem II (σ PSII, 3.0–8.2), and high molar ratio of fucoxanthin:chlorophyll a (mean = 1.62 ± 0.15 SD). Between 24 October and 8 November, the algae exhibited a photoacclimative response that was marked by a 30% decrease in photosynthetic efficiency (α B ), a 75% decrease in maximum photosynthetic rate (P B/ m ), and a 60% increase in σ PSII . The photochemical conversion efficiency at photosystem II (F v /F m = ca. 0.5) and the quantum yield of photosynthesis (Ø C = 0.062– 0.078 mol C mol −1 photons) were ca. 80% of their maximal values. After 8 November, changes in algal photophysiology and biochemistry, which were inconsistent with a photoacclimation response, suggest that the platelet ice algae near the platelet/congelation ice interface became increasingly nutrient limited. The number of pennate diatoms increased threefold to 150 × 10 9 cells m −3 between 8 and 14 November, then remained unchanged throughout the remainder of the field season. Following the increase in cell number, F v /F m , Ø C , and C:Chl a decreased by >40%, σ PSII increased by 70%; and the biochemical ratios C:N and C:Si increased 25%–30%. Nutrient depletion was apparent from the high‐resolution vertical profiles, but nutrient concentrations limiting algal growth were not observed. However, nutrient concentrations at the likely site of nutrient limitation near the platelet/congelation ice interface were not measured, indicating that ... |
format |
Article in Journal/Newspaper |
author |
Robinson, Dale H. Arrigo, Kevin R. Kolber, Zbigniew Gosselin, Michel Sullivan, Cornelius W. |
spellingShingle |
Robinson, Dale H. Arrigo, Kevin R. Kolber, Zbigniew Gosselin, Michel Sullivan, Cornelius W. PHOTOPHYSIOLOGICAL EVIDENCE OF NUTRIENT LIMITATION OF PLATELET ICE ALGAE IN MCMURDO SOUND, ANTARCTICA |
author_facet |
Robinson, Dale H. Arrigo, Kevin R. Kolber, Zbigniew Gosselin, Michel Sullivan, Cornelius W. |
author_sort |
Robinson, Dale H. |
title |
PHOTOPHYSIOLOGICAL EVIDENCE OF NUTRIENT LIMITATION OF PLATELET ICE ALGAE IN MCMURDO SOUND, ANTARCTICA |
title_short |
PHOTOPHYSIOLOGICAL EVIDENCE OF NUTRIENT LIMITATION OF PLATELET ICE ALGAE IN MCMURDO SOUND, ANTARCTICA |
title_full |
PHOTOPHYSIOLOGICAL EVIDENCE OF NUTRIENT LIMITATION OF PLATELET ICE ALGAE IN MCMURDO SOUND, ANTARCTICA |
title_fullStr |
PHOTOPHYSIOLOGICAL EVIDENCE OF NUTRIENT LIMITATION OF PLATELET ICE ALGAE IN MCMURDO SOUND, ANTARCTICA |
title_full_unstemmed |
PHOTOPHYSIOLOGICAL EVIDENCE OF NUTRIENT LIMITATION OF PLATELET ICE ALGAE IN MCMURDO SOUND, ANTARCTICA |
title_sort |
photophysiological evidence of nutrient limitation of platelet ice algae in mcmurdo sound, antarctica |
publisher |
Wiley |
publishDate |
1998 |
url |
http://dx.doi.org/10.1046/j.1529-8817.1998.340788.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1529-8817.1998.340788.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1529-8817.1998.340788.x |
geographic |
Austral McMurdo Sound |
geographic_facet |
Austral McMurdo Sound |
genre |
Antarc* Antarctica ice algae McMurdo Sound Sea ice |
genre_facet |
Antarc* Antarctica ice algae McMurdo Sound Sea ice |
op_source |
Journal of Phycology volume 34, issue 5, page 788-797 ISSN 0022-3646 1529-8817 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1529-8817.1998.340788.x |
container_title |
Journal of Phycology |
container_volume |
34 |
container_issue |
5 |
container_start_page |
788 |
op_container_end_page |
797 |
_version_ |
1800759065090981888 |