Large‐scale variability in surface bacterial carbon demand and growth efficiency in the subtropical northeast Atlantic Ocean
We present surface estimates of bacterial respiration, bacterial heterotrophic production (BHP), and bacterial growth efficiency (BGE), and their relationship with nutrient availability, along a trophic gradient from coastal upwelling waters to the open‐ocean waters of the eastern North Atlantic. Ba...
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crwiley:10.4319/lo.2007.52.2.0533 2024-06-09T07:48:14+00:00 Large‐scale variability in surface bacterial carbon demand and growth efficiency in the subtropical northeast Atlantic Ocean Alonso-Sáez, Laura Gasol, Josep M. Arístegui, Javier Vilas, Juan C. Vaqué, Dolors Duarte, Carlos M. Agustí, Susana 2007 http://dx.doi.org/10.4319/lo.2007.52.2.0533 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2007.52.2.0533 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2007.52.2.0533 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 52, issue 2, page 533-546 ISSN 0024-3590 1939-5590 journal-article 2007 crwiley https://doi.org/10.4319/lo.2007.52.2.0533 2024-05-16T14:25:35Z We present surface estimates of bacterial respiration, bacterial heterotrophic production (BHP), and bacterial growth efficiency (BGE), and their relationship with nutrient availability, along a trophic gradient from coastal upwelling waters to the open‐ocean waters of the eastern North Atlantic. Bacterial respiration generally ranged between 10 and 30 µg C L −1 d −1 and was relatively unaffected by nutrient enrichment. In contrast, BHP showed higher variability (more than one order‐of‐magnitude range) and was affected by carbon and/or phosphorus additions in different regions. Empirical bacterial carbon‐to‐leucine (Leu) conversion factors (CFs) (range, 0.02–1.29 kg C mol Leu −1 ) decreased from the coast to the open ocean, largely influencing the BHP estimates in oligotrophic waters. We found high percentages of Leu respiration in oceanic waters (average 68% of Leu taken up by bacteria), possibly related to the low CFs found offshore. Empirical CFs were highly correlated to BGE (Pearson correlation coefficient r = 0.86, n = 12, p < 0.0004, log‐log transformed), which varied between 1% in offshore waters and 56% in the upwelling waters. Empirical CFs could be critical not only for accurately constraining BHP, but probably also for predicting BGE in oceanic waters. Article in Journal/Newspaper North Atlantic Northeast Atlantic Wiley Online Library Limnology and Oceanography 52 2 533 546 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
We present surface estimates of bacterial respiration, bacterial heterotrophic production (BHP), and bacterial growth efficiency (BGE), and their relationship with nutrient availability, along a trophic gradient from coastal upwelling waters to the open‐ocean waters of the eastern North Atlantic. Bacterial respiration generally ranged between 10 and 30 µg C L −1 d −1 and was relatively unaffected by nutrient enrichment. In contrast, BHP showed higher variability (more than one order‐of‐magnitude range) and was affected by carbon and/or phosphorus additions in different regions. Empirical bacterial carbon‐to‐leucine (Leu) conversion factors (CFs) (range, 0.02–1.29 kg C mol Leu −1 ) decreased from the coast to the open ocean, largely influencing the BHP estimates in oligotrophic waters. We found high percentages of Leu respiration in oceanic waters (average 68% of Leu taken up by bacteria), possibly related to the low CFs found offshore. Empirical CFs were highly correlated to BGE (Pearson correlation coefficient r = 0.86, n = 12, p < 0.0004, log‐log transformed), which varied between 1% in offshore waters and 56% in the upwelling waters. Empirical CFs could be critical not only for accurately constraining BHP, but probably also for predicting BGE in oceanic waters. |
format |
Article in Journal/Newspaper |
author |
Alonso-Sáez, Laura Gasol, Josep M. Arístegui, Javier Vilas, Juan C. Vaqué, Dolors Duarte, Carlos M. Agustí, Susana |
spellingShingle |
Alonso-Sáez, Laura Gasol, Josep M. Arístegui, Javier Vilas, Juan C. Vaqué, Dolors Duarte, Carlos M. Agustí, Susana Large‐scale variability in surface bacterial carbon demand and growth efficiency in the subtropical northeast Atlantic Ocean |
author_facet |
Alonso-Sáez, Laura Gasol, Josep M. Arístegui, Javier Vilas, Juan C. Vaqué, Dolors Duarte, Carlos M. Agustí, Susana |
author_sort |
Alonso-Sáez, Laura |
title |
Large‐scale variability in surface bacterial carbon demand and growth efficiency in the subtropical northeast Atlantic Ocean |
title_short |
Large‐scale variability in surface bacterial carbon demand and growth efficiency in the subtropical northeast Atlantic Ocean |
title_full |
Large‐scale variability in surface bacterial carbon demand and growth efficiency in the subtropical northeast Atlantic Ocean |
title_fullStr |
Large‐scale variability in surface bacterial carbon demand and growth efficiency in the subtropical northeast Atlantic Ocean |
title_full_unstemmed |
Large‐scale variability in surface bacterial carbon demand and growth efficiency in the subtropical northeast Atlantic Ocean |
title_sort |
large‐scale variability in surface bacterial carbon demand and growth efficiency in the subtropical northeast atlantic ocean |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.4319/lo.2007.52.2.0533 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2007.52.2.0533 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2007.52.2.0533 |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
Limnology and Oceanography volume 52, issue 2, page 533-546 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2007.52.2.0533 |
container_title |
Limnology and Oceanography |
container_volume |
52 |
container_issue |
2 |
container_start_page |
533 |
op_container_end_page |
546 |
_version_ |
1801379865792872448 |