Production of heterotrophic bacteria inhabiting macroscopic organic aggregates (marine snow) from surface waters
Macroscopic detrital aggregates, known as marine snow, are a ubiquitous and abundant component of the marine pelagic zone. Descriptions of microbial communities occurring at densities 2-5 orders of magnitude higher on these particles than in the surrounding seawater have led to the suggestion that m...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.319.6191 2023-05-15T17:33:32+02:00 Production of heterotrophic bacteria inhabiting macroscopic organic aggregates (marine snow) from surface waters Alice L. Alldredge Jonathan J. Cole David A. Caron The Pennsylvania State University CiteSeerX Archives 1986 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.319.6191 http://new.aslo.org/lo/toc/vol_31/issue_1/0068.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.319.6191 http://new.aslo.org/lo/toc/vol_31/issue_1/0068.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://new.aslo.org/lo/toc/vol_31/issue_1/0068.pdf text 1986 ftciteseerx 2016-09-04T00:14:47Z Macroscopic detrital aggregates, known as marine snow, are a ubiquitous and abundant component of the marine pelagic zone. Descriptions of microbial communities occurring at densities 2-5 orders of magnitude higher on these particles than in the surrounding seawater have led to the suggestion that marine snow may be a site of intense heterotrophic activity. We tested this hypothesis using incorporation of [3H]thymidine into macromolecules as a measure of bacterial growth occurring on marine snow from oceanic waters in the North Atlantic and from neritic waters off southern California. Abundances of marine snow ranged from 0.1 to 4.3 aggregates liter-‘. However, only O.l-4% of the bacteria in the water occurred in association with marine snow. Mean thymidine incorporation per cell on aggregates was generally equal to or lower than that of bacteria found free-living in the surrounding seawater, indicating that attached bacteria were not growing more rapidly than free-living bacteria. Bacteria inhabiting aggregates were up to 25 times larger than free-living forms. Thus, the contribution of these attached bacteria to total bacterial production in surface waters was low but occasionally significant, ranging from 3 to 26 % and averaging 8 + 7%. Text North Atlantic Unknown |
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English |
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Macroscopic detrital aggregates, known as marine snow, are a ubiquitous and abundant component of the marine pelagic zone. Descriptions of microbial communities occurring at densities 2-5 orders of magnitude higher on these particles than in the surrounding seawater have led to the suggestion that marine snow may be a site of intense heterotrophic activity. We tested this hypothesis using incorporation of [3H]thymidine into macromolecules as a measure of bacterial growth occurring on marine snow from oceanic waters in the North Atlantic and from neritic waters off southern California. Abundances of marine snow ranged from 0.1 to 4.3 aggregates liter-‘. However, only O.l-4% of the bacteria in the water occurred in association with marine snow. Mean thymidine incorporation per cell on aggregates was generally equal to or lower than that of bacteria found free-living in the surrounding seawater, indicating that attached bacteria were not growing more rapidly than free-living bacteria. Bacteria inhabiting aggregates were up to 25 times larger than free-living forms. Thus, the contribution of these attached bacteria to total bacterial production in surface waters was low but occasionally significant, ranging from 3 to 26 % and averaging 8 + 7%. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Alice L. Alldredge Jonathan J. Cole David A. Caron |
spellingShingle |
Alice L. Alldredge Jonathan J. Cole David A. Caron Production of heterotrophic bacteria inhabiting macroscopic organic aggregates (marine snow) from surface waters |
author_facet |
Alice L. Alldredge Jonathan J. Cole David A. Caron |
author_sort |
Alice L. Alldredge |
title |
Production of heterotrophic bacteria inhabiting macroscopic organic aggregates (marine snow) from surface waters |
title_short |
Production of heterotrophic bacteria inhabiting macroscopic organic aggregates (marine snow) from surface waters |
title_full |
Production of heterotrophic bacteria inhabiting macroscopic organic aggregates (marine snow) from surface waters |
title_fullStr |
Production of heterotrophic bacteria inhabiting macroscopic organic aggregates (marine snow) from surface waters |
title_full_unstemmed |
Production of heterotrophic bacteria inhabiting macroscopic organic aggregates (marine snow) from surface waters |
title_sort |
production of heterotrophic bacteria inhabiting macroscopic organic aggregates (marine snow) from surface waters |
publishDate |
1986 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.319.6191 http://new.aslo.org/lo/toc/vol_31/issue_1/0068.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://new.aslo.org/lo/toc/vol_31/issue_1/0068.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.319.6191 http://new.aslo.org/lo/toc/vol_31/issue_1/0068.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766132078402863104 |