Photosynthesis-irradiance responses in the Ross Sea, Antarctica: a meta-analysis
A meta-analysis of photosynthesis-irradiance measurements was completed using data from the Ross Sea, Antarctica, using a total of 417 independent measurements. P-m(B), the maximum, chlorophyll-specific, irradiancesaturated rate of photosynthesis, averaged 1.1 +/- 0.06 mu gC (mu g Chl)(-1) h(-1). Li...
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ftwilliammarycol:oai:scholarworks.wm.edu:vimsarticles-1052 2024-06-23T07:47:54+00:00 Photosynthesis-irradiance responses in the Ross Sea, Antarctica: a meta-analysis Smith, Walker O., Jr. Donaldson, K. 2015-01-01T08:00:00Z application/pdf https://scholarworks.wm.edu/vimsarticles/53 doi: 10.5194/bg-12-3567-2015 https://scholarworks.wm.edu/context/vimsarticles/article/1052/viewcontent/irradiance.pdf unknown W&M ScholarWorks https://scholarworks.wm.edu/vimsarticles/53 doi: 10.5194/bg-12-3567-2015 https://scholarworks.wm.edu/context/vimsarticles/article/1052/viewcontent/irradiance.pdf http://creativecommons.org/licenses/by/4.0/ VIMS Articles SOUTHERN-OCEAN PHYTOPLANKTON MARINE-PHYTOPLANKTON FRAGILARIOPSIS-CYLINDRUS PHAEOCYSTIS-ANTARCTICA COMMUNITY STRUCTURE IRON OCEANOGRAPHY TEMPERATURE GROWTH LIGHT Biological Sciences Peer-Reviewed Articles Marine Biology text 2015 ftwilliammarycol https://doi.org/10.5194/bg-12-3567-2015 2024-06-05T03:29:28Z A meta-analysis of photosynthesis-irradiance measurements was completed using data from the Ross Sea, Antarctica, using a total of 417 independent measurements. P-m(B), the maximum, chlorophyll-specific, irradiancesaturated rate of photosynthesis, averaged 1.1 +/- 0.06 mu gC (mu g Chl)(-1) h(-1). Light-limited, chlorophyll-specific photosynthetic rates (alpha(B)) averaged 0.030 +/- 0.023 mu gC (mu g Chl)(-1) h(-1) (mu mol quanta m(-2) s(-1))(-1). Significant variations in P-m(B) and alpha(B) were found as a function of season, with spring maximum photosynthetic rates being 60% greater than those in summer. Similarly, alpha values were 48% greater in spring. There was no detectable effect of sampling location on the photosynthetic parameters, and temperature and macronutrient (NO3) concentrations also did not have an influence. However, irradiance and carbon dioxide concentrations, when altered under controlled conditions, exerted significant influences on photosynthetic parameters. Specifically, reduced irradiance resulted in significantly decreased P-m(B) and increased alpha(B) values, and increased CO2 concentrations resulted in significantly increased P-m(B) and alpha(B) values. Comparison of photosynthetic parameters derived at stations where iron concentrations were above and below 0.1nM indicated that reduced iron levels were associated with significantly increased P-m(B) values, confirming the importance of iron within the photosynthetic process. No significant difference was detected between stations dominated by diatoms and those dominated by the haptophyte Phaeocystis antarctica. The meta-analysis confirms the photosynthetic rates predicted from global analyses that are based solely on temperature and irradiance availability, but suggests that, for more accurate predictions of productivity in polar systems, a more detailed model that includes temporal effects of photosynthetic parameters will be required. Text Antarc* Antarctica Ross Sea Southern Ocean W&M ScholarWorks Ross Sea Southern Ocean Biogeosciences 12 11 3567 3577 |
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W&M ScholarWorks |
op_collection_id |
ftwilliammarycol |
language |
unknown |
topic |
SOUTHERN-OCEAN PHYTOPLANKTON MARINE-PHYTOPLANKTON FRAGILARIOPSIS-CYLINDRUS PHAEOCYSTIS-ANTARCTICA COMMUNITY STRUCTURE IRON OCEANOGRAPHY TEMPERATURE GROWTH LIGHT Biological Sciences Peer-Reviewed Articles Marine Biology |
spellingShingle |
SOUTHERN-OCEAN PHYTOPLANKTON MARINE-PHYTOPLANKTON FRAGILARIOPSIS-CYLINDRUS PHAEOCYSTIS-ANTARCTICA COMMUNITY STRUCTURE IRON OCEANOGRAPHY TEMPERATURE GROWTH LIGHT Biological Sciences Peer-Reviewed Articles Marine Biology Smith, Walker O., Jr. Donaldson, K. Photosynthesis-irradiance responses in the Ross Sea, Antarctica: a meta-analysis |
topic_facet |
SOUTHERN-OCEAN PHYTOPLANKTON MARINE-PHYTOPLANKTON FRAGILARIOPSIS-CYLINDRUS PHAEOCYSTIS-ANTARCTICA COMMUNITY STRUCTURE IRON OCEANOGRAPHY TEMPERATURE GROWTH LIGHT Biological Sciences Peer-Reviewed Articles Marine Biology |
description |
A meta-analysis of photosynthesis-irradiance measurements was completed using data from the Ross Sea, Antarctica, using a total of 417 independent measurements. P-m(B), the maximum, chlorophyll-specific, irradiancesaturated rate of photosynthesis, averaged 1.1 +/- 0.06 mu gC (mu g Chl)(-1) h(-1). Light-limited, chlorophyll-specific photosynthetic rates (alpha(B)) averaged 0.030 +/- 0.023 mu gC (mu g Chl)(-1) h(-1) (mu mol quanta m(-2) s(-1))(-1). Significant variations in P-m(B) and alpha(B) were found as a function of season, with spring maximum photosynthetic rates being 60% greater than those in summer. Similarly, alpha values were 48% greater in spring. There was no detectable effect of sampling location on the photosynthetic parameters, and temperature and macronutrient (NO3) concentrations also did not have an influence. However, irradiance and carbon dioxide concentrations, when altered under controlled conditions, exerted significant influences on photosynthetic parameters. Specifically, reduced irradiance resulted in significantly decreased P-m(B) and increased alpha(B) values, and increased CO2 concentrations resulted in significantly increased P-m(B) and alpha(B) values. Comparison of photosynthetic parameters derived at stations where iron concentrations were above and below 0.1nM indicated that reduced iron levels were associated with significantly increased P-m(B) values, confirming the importance of iron within the photosynthetic process. No significant difference was detected between stations dominated by diatoms and those dominated by the haptophyte Phaeocystis antarctica. The meta-analysis confirms the photosynthetic rates predicted from global analyses that are based solely on temperature and irradiance availability, but suggests that, for more accurate predictions of productivity in polar systems, a more detailed model that includes temporal effects of photosynthetic parameters will be required. |
format |
Text |
author |
Smith, Walker O., Jr. Donaldson, K. |
author_facet |
Smith, Walker O., Jr. Donaldson, K. |
author_sort |
Smith, Walker O., Jr. |
title |
Photosynthesis-irradiance responses in the Ross Sea, Antarctica: a meta-analysis |
title_short |
Photosynthesis-irradiance responses in the Ross Sea, Antarctica: a meta-analysis |
title_full |
Photosynthesis-irradiance responses in the Ross Sea, Antarctica: a meta-analysis |
title_fullStr |
Photosynthesis-irradiance responses in the Ross Sea, Antarctica: a meta-analysis |
title_full_unstemmed |
Photosynthesis-irradiance responses in the Ross Sea, Antarctica: a meta-analysis |
title_sort |
photosynthesis-irradiance responses in the ross sea, antarctica: a meta-analysis |
publisher |
W&M ScholarWorks |
publishDate |
2015 |
url |
https://scholarworks.wm.edu/vimsarticles/53 https://scholarworks.wm.edu/context/vimsarticles/article/1052/viewcontent/irradiance.pdf |
geographic |
Ross Sea Southern Ocean |
geographic_facet |
Ross Sea Southern Ocean |
genre |
Antarc* Antarctica Ross Sea Southern Ocean |
genre_facet |
Antarc* Antarctica Ross Sea Southern Ocean |
op_source |
VIMS Articles |
op_relation |
https://scholarworks.wm.edu/vimsarticles/53 doi: 10.5194/bg-12-3567-2015 https://scholarworks.wm.edu/context/vimsarticles/article/1052/viewcontent/irradiance.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.5194/bg-12-3567-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
11 |
container_start_page |
3567 |
op_container_end_page |
3577 |
_version_ |
1802638135929077760 |