Bacterioplankton distribution and production in deep Pacific waters: Large–scale geographic variations and possible coupling with sinking particle fluxes
Bacterial abundance and leucine incorporation rate were measured throughout the water column (depth, 4,000– 6,000 m) at stations occupied in the equatorial, subtropical, and subarctic Pacific as well as in the Bering Sea during three cruises conducted between 1993 and 1997. In general, depth‐depende...
Published in: | Limnology and Oceanography |
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Language: | English |
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crwiley:10.4319/lo.2000.45.2.0426 2024-09-30T14:33:08+00:00 Bacterioplankton distribution and production in deep Pacific waters: Large–scale geographic variations and possible coupling with sinking particle fluxes Nagata, Toshi Fukuda, Hideki Fukuda, Rumi Koike, Isao 2000 http://dx.doi.org/10.4319/lo.2000.45.2.0426 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2000.45.2.0426 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2000.45.2.0426 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 45, issue 2, page 426-435 ISSN 0024-3590 1939-5590 journal-article 2000 crwiley https://doi.org/10.4319/lo.2000.45.2.0426 2024-09-03T04:26:51Z Bacterial abundance and leucine incorporation rate were measured throughout the water column (depth, 4,000– 6,000 m) at stations occupied in the equatorial, subtropical, and subarctic Pacific as well as in the Bering Sea during three cruises conducted between 1993 and 1997. In general, depth‐dependent decreases of bacterial abundance and leucine incorporation in the bathypelagic layer (depth, >1,000 m) were well described by a power function with remarkably uniform exponents among distant locations: average exponents were –0.900 and –1.33 for abundance and leucine incorporation, respectively. Depth profiles of bacterial properties were complex at some subarctic stations, suggesting lateral transport of organic carbon by local eddies. Organic carbon fluxes from abyssal sediment to overlying water would explain increases in bacterial abundance and leucine incorporation in near‐bottom layers. Biomass was twofold to fourfold and the production was threefold to sevenfold greater in subarctic than in subtropical regions. This latitudinal pattern was consistent with the basin‐scale distribution of sinking fluxes of particulate organic carbon (POC) reported in the literature. Rates of bacterial carbon uptake accounted for 51% (range, 31–153) and 23% (14–58) of deep sinking POC fluxes in subarctic and subtropical regions, respectively. Average turnover time of deep bacterial assemblages was estimated to be 1–30 yr. These results suggest that deep bacterial biomass and production are generally coupled with sinking POC fluxes and that organic carbon is substantially transformed within bathypelagic environments via a sinking POC → dissolved organic carbon → bacteria pathway, as previously suggested in the mesopelagic zone. Article in Journal/Newspaper Bering Sea Subarctic Wiley Online Library Bering Sea Pacific Limnology and Oceanography 45 2 426 435 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Bacterial abundance and leucine incorporation rate were measured throughout the water column (depth, 4,000– 6,000 m) at stations occupied in the equatorial, subtropical, and subarctic Pacific as well as in the Bering Sea during three cruises conducted between 1993 and 1997. In general, depth‐dependent decreases of bacterial abundance and leucine incorporation in the bathypelagic layer (depth, >1,000 m) were well described by a power function with remarkably uniform exponents among distant locations: average exponents were –0.900 and –1.33 for abundance and leucine incorporation, respectively. Depth profiles of bacterial properties were complex at some subarctic stations, suggesting lateral transport of organic carbon by local eddies. Organic carbon fluxes from abyssal sediment to overlying water would explain increases in bacterial abundance and leucine incorporation in near‐bottom layers. Biomass was twofold to fourfold and the production was threefold to sevenfold greater in subarctic than in subtropical regions. This latitudinal pattern was consistent with the basin‐scale distribution of sinking fluxes of particulate organic carbon (POC) reported in the literature. Rates of bacterial carbon uptake accounted for 51% (range, 31–153) and 23% (14–58) of deep sinking POC fluxes in subarctic and subtropical regions, respectively. Average turnover time of deep bacterial assemblages was estimated to be 1–30 yr. These results suggest that deep bacterial biomass and production are generally coupled with sinking POC fluxes and that organic carbon is substantially transformed within bathypelagic environments via a sinking POC → dissolved organic carbon → bacteria pathway, as previously suggested in the mesopelagic zone. |
format |
Article in Journal/Newspaper |
author |
Nagata, Toshi Fukuda, Hideki Fukuda, Rumi Koike, Isao |
spellingShingle |
Nagata, Toshi Fukuda, Hideki Fukuda, Rumi Koike, Isao Bacterioplankton distribution and production in deep Pacific waters: Large–scale geographic variations and possible coupling with sinking particle fluxes |
author_facet |
Nagata, Toshi Fukuda, Hideki Fukuda, Rumi Koike, Isao |
author_sort |
Nagata, Toshi |
title |
Bacterioplankton distribution and production in deep Pacific waters: Large–scale geographic variations and possible coupling with sinking particle fluxes |
title_short |
Bacterioplankton distribution and production in deep Pacific waters: Large–scale geographic variations and possible coupling with sinking particle fluxes |
title_full |
Bacterioplankton distribution and production in deep Pacific waters: Large–scale geographic variations and possible coupling with sinking particle fluxes |
title_fullStr |
Bacterioplankton distribution and production in deep Pacific waters: Large–scale geographic variations and possible coupling with sinking particle fluxes |
title_full_unstemmed |
Bacterioplankton distribution and production in deep Pacific waters: Large–scale geographic variations and possible coupling with sinking particle fluxes |
title_sort |
bacterioplankton distribution and production in deep pacific waters: large–scale geographic variations and possible coupling with sinking particle fluxes |
publisher |
Wiley |
publishDate |
2000 |
url |
http://dx.doi.org/10.4319/lo.2000.45.2.0426 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2000.45.2.0426 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2000.45.2.0426 |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea Subarctic |
genre_facet |
Bering Sea Subarctic |
op_source |
Limnology and Oceanography volume 45, issue 2, page 426-435 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2000.45.2.0426 |
container_title |
Limnology and Oceanography |
container_volume |
45 |
container_issue |
2 |
container_start_page |
426 |
op_container_end_page |
435 |
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1811637139940573184 |