Implications of bio-optical modeling of phytoplankton photosynthesis in Antarctic waters: Further evidence of no light limitation in the Bransfield Strait
10 páginas, 9 figuras, 1 tabla During the cruise ECOANTAR 94 photosynthesis versus irradiance relationships, phytoplankton spectral absorption, quantum yield of carbon fixation, and water column light regime were determined in the eastern Bransfield Strait and surrounding areas of the Weddell Sea an...
Published in: | Limnology and Oceanography |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Association for the Sciences of Limnology and Oceanography
1999
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/57626 https://doi.org/10.4319/lo.1999.44.7.1599 |
id |
ftcsic:oai:digital.csic.es:10261/57626 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/57626 2024-02-11T09:56:48+01:00 Implications of bio-optical modeling of phytoplankton photosynthesis in Antarctic waters: Further evidence of no light limitation in the Bransfield Strait Figueiras, F. G. Arbones, Belén Estrada, Marta 1999 http://hdl.handle.net/10261/57626 https://doi.org/10.4319/lo.1999.44.7.1599 en eng Association for the Sciences of Limnology and Oceanography http://dx.doi.org/10.4319/lo.1999.44.7.1599 Limnology and Oceanography 44(7): 1599-1608 (1999) 0024-3590 http://hdl.handle.net/10261/57626 doi:10.4319/lo.1999.44.7.1599 open artículo http://purl.org/coar/resource_type/c_6501 1999 ftcsic https://doi.org/10.4319/lo.1999.44.7.1599 2024-01-16T09:41:21Z 10 páginas, 9 figuras, 1 tabla During the cruise ECOANTAR 94 photosynthesis versus irradiance relationships, phytoplankton spectral absorption, quantum yield of carbon fixation, and water column light regime were determined in the eastern Bransfield Strait and surrounding areas of the Weddell Sea and Weddell–Scotia Confluence, to determine if photosynthesis is light limited in these areas. There were no significant differences in the light-saturated chlorophyll-specific rate of photosynthesis (PBm), light-limited slope (aB), light saturation parameter (EkPAR), and the maximum quantum yield (thetam) between surface and subsurface water for several water masses in the area, which indicates that the photosyn-thetic response in the upper mixed layer was uniform. There were also no significant differences between the spectral light saturation parameter (EkPUR) and the mean absorbed irradiance by phytoplankton in the upper mixed layer (EumlPUR). These similarities suggest that phytoplankton photosynthesis was not light limited in this Antarctic region during the cruise period. This was also affirmed by the fact that the average operational quantum yield of the water column (0.03 mol C [mol photons]-1) was half of the mean maximum quantum yield (0.06 mol C [mol photons]-1). Primary production is underestimated by 24% when broadband models are compared with spectral ones. These results have important implications for the modeling of carbon flows in the Southern Ocean. This research was supported by the CICYT (Spanish Commission of Science and Technology) projects ANT93–0997 and AMB93–0129. The work of B.A. was funded by a grant from Xunta de Galicia Peer reviewed Article in Journal/Newspaper Antarc* Antarctic Bransfield Strait Southern Ocean Weddell Sea Digital.CSIC (Spanish National Research Council) Antarctic Southern Ocean Weddell Sea Bransfield Strait Weddell Limnology and Oceanography 44 7 1599 1608 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
10 páginas, 9 figuras, 1 tabla During the cruise ECOANTAR 94 photosynthesis versus irradiance relationships, phytoplankton spectral absorption, quantum yield of carbon fixation, and water column light regime were determined in the eastern Bransfield Strait and surrounding areas of the Weddell Sea and Weddell–Scotia Confluence, to determine if photosynthesis is light limited in these areas. There were no significant differences in the light-saturated chlorophyll-specific rate of photosynthesis (PBm), light-limited slope (aB), light saturation parameter (EkPAR), and the maximum quantum yield (thetam) between surface and subsurface water for several water masses in the area, which indicates that the photosyn-thetic response in the upper mixed layer was uniform. There were also no significant differences between the spectral light saturation parameter (EkPUR) and the mean absorbed irradiance by phytoplankton in the upper mixed layer (EumlPUR). These similarities suggest that phytoplankton photosynthesis was not light limited in this Antarctic region during the cruise period. This was also affirmed by the fact that the average operational quantum yield of the water column (0.03 mol C [mol photons]-1) was half of the mean maximum quantum yield (0.06 mol C [mol photons]-1). Primary production is underestimated by 24% when broadband models are compared with spectral ones. These results have important implications for the modeling of carbon flows in the Southern Ocean. This research was supported by the CICYT (Spanish Commission of Science and Technology) projects ANT93–0997 and AMB93–0129. The work of B.A. was funded by a grant from Xunta de Galicia Peer reviewed |
format |
Article in Journal/Newspaper |
author |
Figueiras, F. G. Arbones, Belén Estrada, Marta |
spellingShingle |
Figueiras, F. G. Arbones, Belén Estrada, Marta Implications of bio-optical modeling of phytoplankton photosynthesis in Antarctic waters: Further evidence of no light limitation in the Bransfield Strait |
author_facet |
Figueiras, F. G. Arbones, Belén Estrada, Marta |
author_sort |
Figueiras, F. G. |
title |
Implications of bio-optical modeling of phytoplankton photosynthesis in Antarctic waters: Further evidence of no light limitation in the Bransfield Strait |
title_short |
Implications of bio-optical modeling of phytoplankton photosynthesis in Antarctic waters: Further evidence of no light limitation in the Bransfield Strait |
title_full |
Implications of bio-optical modeling of phytoplankton photosynthesis in Antarctic waters: Further evidence of no light limitation in the Bransfield Strait |
title_fullStr |
Implications of bio-optical modeling of phytoplankton photosynthesis in Antarctic waters: Further evidence of no light limitation in the Bransfield Strait |
title_full_unstemmed |
Implications of bio-optical modeling of phytoplankton photosynthesis in Antarctic waters: Further evidence of no light limitation in the Bransfield Strait |
title_sort |
implications of bio-optical modeling of phytoplankton photosynthesis in antarctic waters: further evidence of no light limitation in the bransfield strait |
publisher |
Association for the Sciences of Limnology and Oceanography |
publishDate |
1999 |
url |
http://hdl.handle.net/10261/57626 https://doi.org/10.4319/lo.1999.44.7.1599 |
geographic |
Antarctic Southern Ocean Weddell Sea Bransfield Strait Weddell |
geographic_facet |
Antarctic Southern Ocean Weddell Sea Bransfield Strait Weddell |
genre |
Antarc* Antarctic Bransfield Strait Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Bransfield Strait Southern Ocean Weddell Sea |
op_relation |
http://dx.doi.org/10.4319/lo.1999.44.7.1599 Limnology and Oceanography 44(7): 1599-1608 (1999) 0024-3590 http://hdl.handle.net/10261/57626 doi:10.4319/lo.1999.44.7.1599 |
op_rights |
open |
op_doi |
https://doi.org/10.4319/lo.1999.44.7.1599 |
container_title |
Limnology and Oceanography |
container_volume |
44 |
container_issue |
7 |
container_start_page |
1599 |
op_container_end_page |
1608 |
_version_ |
1790605961556131840 |