Evidence for a heterotrophic subtropical northeast Atlantic
The mean (±SE) depth-integrated gross production (P) of 2,600 ± 271 mg O2 m-2 d-1 derived from a compilation of data from nine cruises conducted between 1991-2000 in the subtropical NE Atlantic was found to be significantly lower (t-test, P = 0.005, N = 33) than the mean (±SE) community respiration...
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American Society of Limnology and Oceanography
2001
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ftcsic:oai:digital.csic.es:10261/54407 2024-02-11T10:07:02+01:00 Evidence for a heterotrophic subtropical northeast Atlantic Duarte, Carlos M. Agustí, Susana Arístegui, Javier 2001 http://hdl.handle.net/10261/54407 en eng American Society of Limnology and Oceanography issn: 0024-3590 Limnology and Oceanography 46: 425- 428 (2001) http://hdl.handle.net/10261/54407 none artículo http://purl.org/coar/resource_type/c_6501 2001 ftcsic 2024-01-16T09:39:55Z The mean (±SE) depth-integrated gross production (P) of 2,600 ± 271 mg O2 m-2 d-1 derived from a compilation of data from nine cruises conducted between 1991-2000 in the subtropical NE Atlantic was found to be significantly lower (t-test, P = 0.005, N = 33) than the mean (±SE) community respiration (R) of 3,821 ± 276 mg O2 m-2 d-1. Two-thirds of the stations investigated were heterotrophic, and the P/R ratio of the communities tended to increase as P increased, such that communities where P < 3,000 mg O2 m-2 d-1 tended to be heterotrophic. The tendency for R to exceed P (P/R < 1.0) was statistically significant (Wilcoxon ranked sign test, P < 0.05) in the upper and deep layers of the photic zone, with an overall balance between P and R at intermediate depths. These results provide evidence that the subtropical NE Atlantic is a heterotrophic ecosystem, where planktonic communities respire more organic carbon than they produce, thereby acting as net sources of CO2. The research reported herein was derived from cruises on board R/V Hesperides, Garcia del Cid, and Hudson, within the projects LATITUD I and II (AMB94-0739, MAR98-1676-E) and PB88- 0436, funded by the Spanish Commission of Science and Technol- ogy, and cruises Azores I and II of the CANIGO project (MAS3- CT96-0060), funded by the MAST III program (CE). Peer Reviewed Article in Journal/Newspaper Northeast Atlantic Digital.CSIC (Spanish National Research Council) Hudson |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
The mean (±SE) depth-integrated gross production (P) of 2,600 ± 271 mg O2 m-2 d-1 derived from a compilation of data from nine cruises conducted between 1991-2000 in the subtropical NE Atlantic was found to be significantly lower (t-test, P = 0.005, N = 33) than the mean (±SE) community respiration (R) of 3,821 ± 276 mg O2 m-2 d-1. Two-thirds of the stations investigated were heterotrophic, and the P/R ratio of the communities tended to increase as P increased, such that communities where P < 3,000 mg O2 m-2 d-1 tended to be heterotrophic. The tendency for R to exceed P (P/R < 1.0) was statistically significant (Wilcoxon ranked sign test, P < 0.05) in the upper and deep layers of the photic zone, with an overall balance between P and R at intermediate depths. These results provide evidence that the subtropical NE Atlantic is a heterotrophic ecosystem, where planktonic communities respire more organic carbon than they produce, thereby acting as net sources of CO2. The research reported herein was derived from cruises on board R/V Hesperides, Garcia del Cid, and Hudson, within the projects LATITUD I and II (AMB94-0739, MAR98-1676-E) and PB88- 0436, funded by the Spanish Commission of Science and Technol- ogy, and cruises Azores I and II of the CANIGO project (MAS3- CT96-0060), funded by the MAST III program (CE). Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Duarte, Carlos M. Agustí, Susana Arístegui, Javier |
spellingShingle |
Duarte, Carlos M. Agustí, Susana Arístegui, Javier Evidence for a heterotrophic subtropical northeast Atlantic |
author_facet |
Duarte, Carlos M. Agustí, Susana Arístegui, Javier |
author_sort |
Duarte, Carlos M. |
title |
Evidence for a heterotrophic subtropical northeast Atlantic |
title_short |
Evidence for a heterotrophic subtropical northeast Atlantic |
title_full |
Evidence for a heterotrophic subtropical northeast Atlantic |
title_fullStr |
Evidence for a heterotrophic subtropical northeast Atlantic |
title_full_unstemmed |
Evidence for a heterotrophic subtropical northeast Atlantic |
title_sort |
evidence for a heterotrophic subtropical northeast atlantic |
publisher |
American Society of Limnology and Oceanography |
publishDate |
2001 |
url |
http://hdl.handle.net/10261/54407 |
geographic |
Hudson |
geographic_facet |
Hudson |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
issn: 0024-3590 Limnology and Oceanography 46: 425- 428 (2001) http://hdl.handle.net/10261/54407 |
op_rights |
none |
_version_ |
1790605146461306880 |