Carbon fixation by phytoplankton in high Arctic lakes: Implications of low temperature for photosynthesis
Photosynthesis vs. irradiance relationships were determined for phytoplankton communities from seven lakes in the Canadian high Arctic, including ultraoligotrophic Char Lake, nutrient‐enriched Meretta Lake, and two meromictic lakes. The derived photosynthetic parameters were low for all samples, wit...
Published in: | Limnology and Oceanography |
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crwiley:10.4319/lo.1999.44.3.0597 2024-09-15T17:48:19+00:00 Carbon fixation by phytoplankton in high Arctic lakes: Implications of low temperature for photosynthesis Markager, Stiig Vincent, Warwick F. Tang, Evonne P.Y. 1999 http://dx.doi.org/10.4319/lo.1999.44.3.0597 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1999.44.3.0597 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1999.44.3.0597 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 44, issue 3, page 597-607 ISSN 0024-3590 1939-5590 journal-article 1999 crwiley https://doi.org/10.4319/lo.1999.44.3.0597 2024-08-27T04:28:16Z Photosynthesis vs. irradiance relationships were determined for phytoplankton communities from seven lakes in the Canadian high Arctic, including ultraoligotrophic Char Lake, nutrient‐enriched Meretta Lake, and two meromictic lakes. The derived photosynthetic parameters were low for all samples, with a mean (±SD) light‐saturated photosynthetic rate (P m B ) of 0.46 (±0.28) g C g −1 chlorophyll a (Chl a )h −1 and a mean α B (light‐limitation parameter) of 1.23 (±0.56) g C g −1 Chl a m 2 mol −1 . The saturation irradiance (E Κ ) ranged from 50 to 196 μmol quanta m −2 s −1 and was positively correlated with mean irradiance for the water column. Quantum yields for photosynthesis in the Arctic lake phytoplankton were also low (mostly <10 mmol C mol −1 quanta). An intersystem comparison of α B and P m B values with literature data for algae from other cold environments showed that the photosynthetic parameters for phytoplankton in Arctic and Antarctic lakes are three‐ to sixfold lower than for marine algae, ice algae, and cultures over the same low‐temperature range. This may be the result of more severe nutrient stress in high latitude lakes relative to polar marine environments and to the persistence of nonactive pigments in cold freshwaters. Article in Journal/Newspaper Antarc* Antarctic ice algae Phytoplankton Wiley Online Library Limnology and Oceanography 44 3 597 607 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Photosynthesis vs. irradiance relationships were determined for phytoplankton communities from seven lakes in the Canadian high Arctic, including ultraoligotrophic Char Lake, nutrient‐enriched Meretta Lake, and two meromictic lakes. The derived photosynthetic parameters were low for all samples, with a mean (±SD) light‐saturated photosynthetic rate (P m B ) of 0.46 (±0.28) g C g −1 chlorophyll a (Chl a )h −1 and a mean α B (light‐limitation parameter) of 1.23 (±0.56) g C g −1 Chl a m 2 mol −1 . The saturation irradiance (E Κ ) ranged from 50 to 196 μmol quanta m −2 s −1 and was positively correlated with mean irradiance for the water column. Quantum yields for photosynthesis in the Arctic lake phytoplankton were also low (mostly <10 mmol C mol −1 quanta). An intersystem comparison of α B and P m B values with literature data for algae from other cold environments showed that the photosynthetic parameters for phytoplankton in Arctic and Antarctic lakes are three‐ to sixfold lower than for marine algae, ice algae, and cultures over the same low‐temperature range. This may be the result of more severe nutrient stress in high latitude lakes relative to polar marine environments and to the persistence of nonactive pigments in cold freshwaters. |
format |
Article in Journal/Newspaper |
author |
Markager, Stiig Vincent, Warwick F. Tang, Evonne P.Y. |
spellingShingle |
Markager, Stiig Vincent, Warwick F. Tang, Evonne P.Y. Carbon fixation by phytoplankton in high Arctic lakes: Implications of low temperature for photosynthesis |
author_facet |
Markager, Stiig Vincent, Warwick F. Tang, Evonne P.Y. |
author_sort |
Markager, Stiig |
title |
Carbon fixation by phytoplankton in high Arctic lakes: Implications of low temperature for photosynthesis |
title_short |
Carbon fixation by phytoplankton in high Arctic lakes: Implications of low temperature for photosynthesis |
title_full |
Carbon fixation by phytoplankton in high Arctic lakes: Implications of low temperature for photosynthesis |
title_fullStr |
Carbon fixation by phytoplankton in high Arctic lakes: Implications of low temperature for photosynthesis |
title_full_unstemmed |
Carbon fixation by phytoplankton in high Arctic lakes: Implications of low temperature for photosynthesis |
title_sort |
carbon fixation by phytoplankton in high arctic lakes: implications of low temperature for photosynthesis |
publisher |
Wiley |
publishDate |
1999 |
url |
http://dx.doi.org/10.4319/lo.1999.44.3.0597 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1999.44.3.0597 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1999.44.3.0597 |
genre |
Antarc* Antarctic ice algae Phytoplankton |
genre_facet |
Antarc* Antarctic ice algae Phytoplankton |
op_source |
Limnology and Oceanography volume 44, issue 3, page 597-607 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1999.44.3.0597 |
container_title |
Limnology and Oceanography |
container_volume |
44 |
container_issue |
3 |
container_start_page |
597 |
op_container_end_page |
607 |
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1810289473817149440 |