Respiratory electron transport activity of microplankton in the Weddell Sea during early spring: influence of the ice cover and the ice edge
8 pages, 5 figures, 2 tables The activity of the respiratory electron transport system (ETS) of the microplankton (<240 μm size) was measured in the Northern Weddell Sea during EPOS 1, in the Close Pack Ice (CPI), and in the ice edge (Outer and Inner Marginal Zones, OMIZ and IMIZ). During early s...
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Format: | Article in Journal/Newspaper |
Language: | English |
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1992
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Online Access: | http://hdl.handle.net/10261/198826 https://doi.org/10.1007/BF00238270 |
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ftcsic:oai:digital.csic.es:10261/198826 2024-02-11T10:08:07+01:00 Respiratory electron transport activity of microplankton in the Weddell Sea during early spring: influence of the ice cover and the ice edge Martínez, R. Estrada, Marta 1992-09 http://hdl.handle.net/10261/198826 https://doi.org/10.1007/BF00238270 en eng Springer https://doi.org/10.1007/BF00238270 Sí Polar Biology 12(2): 275–28 (1992) 0722-4060 http://hdl.handle.net/10261/198826 doi:10.1007/BF00238270 1432-2056 none artículo http://purl.org/coar/resource_type/c_6501 1992 ftcsic https://doi.org/10.1007/BF00238270 2024-01-16T10:47:34Z 8 pages, 5 figures, 2 tables The activity of the respiratory electron transport system (ETS) of the microplankton (<240 μm size) was measured in the Northern Weddell Sea during EPOS 1, in the Close Pack Ice (CPI), and in the ice edge (Outer and Inner Marginal Zones, OMIZ and IMIZ). During early spring the activity increased with time and in the pack ice-open water direction. The temporal trend was more obvious than the spatial one. ETS activity ranged from 0.01 to 1.25 ml O2 m−3 h−1 under the ice and from 0.1 to 1.6 ml O2 m−3 h−1 in the open water at the ice edge. Depth-integrated ETS activity in the upper 300 m ranged from 13 to 130 ml O2 m−2h−1. 60% to 80% of the activity took place above 100 m in the OMIZ in the prebloom conditions at the end of the cruise. ETS/Chl a ratios showed the importance of microheterotrophs under the ice, versus a greater phytoplankton dominance in the ice edge-open water zone. The carbon-specific activity reached a maximum (0.43 day−1) in the innermost zone of the CPI where bacteria dominated. Respiratory activity under the ice is important in producing the oxygen deficit observed, due to the negative balance between photosynthesis and respiration. The ETS activity was at the lower range of that found in the region in summer and is comparable to that measured in other oligotrophic, stratified systems in oceanic areas Peer reviewed Article in Journal/Newspaper Polar Biology Weddell Sea Digital.CSIC (Spanish National Research Council) Weddell Weddell Sea Polar Biology 12 2 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
8 pages, 5 figures, 2 tables The activity of the respiratory electron transport system (ETS) of the microplankton (<240 μm size) was measured in the Northern Weddell Sea during EPOS 1, in the Close Pack Ice (CPI), and in the ice edge (Outer and Inner Marginal Zones, OMIZ and IMIZ). During early spring the activity increased with time and in the pack ice-open water direction. The temporal trend was more obvious than the spatial one. ETS activity ranged from 0.01 to 1.25 ml O2 m−3 h−1 under the ice and from 0.1 to 1.6 ml O2 m−3 h−1 in the open water at the ice edge. Depth-integrated ETS activity in the upper 300 m ranged from 13 to 130 ml O2 m−2h−1. 60% to 80% of the activity took place above 100 m in the OMIZ in the prebloom conditions at the end of the cruise. ETS/Chl a ratios showed the importance of microheterotrophs under the ice, versus a greater phytoplankton dominance in the ice edge-open water zone. The carbon-specific activity reached a maximum (0.43 day−1) in the innermost zone of the CPI where bacteria dominated. Respiratory activity under the ice is important in producing the oxygen deficit observed, due to the negative balance between photosynthesis and respiration. The ETS activity was at the lower range of that found in the region in summer and is comparable to that measured in other oligotrophic, stratified systems in oceanic areas Peer reviewed |
format |
Article in Journal/Newspaper |
author |
Martínez, R. Estrada, Marta |
spellingShingle |
Martínez, R. Estrada, Marta Respiratory electron transport activity of microplankton in the Weddell Sea during early spring: influence of the ice cover and the ice edge |
author_facet |
Martínez, R. Estrada, Marta |
author_sort |
Martínez, R. |
title |
Respiratory electron transport activity of microplankton in the Weddell Sea during early spring: influence of the ice cover and the ice edge |
title_short |
Respiratory electron transport activity of microplankton in the Weddell Sea during early spring: influence of the ice cover and the ice edge |
title_full |
Respiratory electron transport activity of microplankton in the Weddell Sea during early spring: influence of the ice cover and the ice edge |
title_fullStr |
Respiratory electron transport activity of microplankton in the Weddell Sea during early spring: influence of the ice cover and the ice edge |
title_full_unstemmed |
Respiratory electron transport activity of microplankton in the Weddell Sea during early spring: influence of the ice cover and the ice edge |
title_sort |
respiratory electron transport activity of microplankton in the weddell sea during early spring: influence of the ice cover and the ice edge |
publisher |
Springer |
publishDate |
1992 |
url |
http://hdl.handle.net/10261/198826 https://doi.org/10.1007/BF00238270 |
geographic |
Weddell Weddell Sea |
geographic_facet |
Weddell Weddell Sea |
genre |
Polar Biology Weddell Sea |
genre_facet |
Polar Biology Weddell Sea |
op_relation |
https://doi.org/10.1007/BF00238270 Sí Polar Biology 12(2): 275–28 (1992) 0722-4060 http://hdl.handle.net/10261/198826 doi:10.1007/BF00238270 1432-2056 |
op_rights |
none |
op_doi |
https://doi.org/10.1007/BF00238270 |
container_title |
Polar Biology |
container_volume |
12 |
container_issue |
2 |
_version_ |
1790607098151698432 |