Significance of Viral Activity for Regulating Heterotrophic Prokaryote Community Dynamics along a Meridional Gradient of Stratification in the Northeast Atlantic Ocean
How microbial populations interact influences the availability and flux of organic carbon in the ocean. Understanding how these interactions vary over broad spatial scales is therefore a fundamental aim of microbial oceanography. In this study, we assessed variations in the abundances, production, v...
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ftmdpi:oai:mdpi.com:/1999-4915/12/11/1293/ 2023-08-20T04:08:27+02:00 Significance of Viral Activity for Regulating Heterotrophic Prokaryote Community Dynamics along a Meridional Gradient of Stratification in the Northeast Atlantic Ocean Kristina D. A. Mojica Corina P. D. Brussaard agris 2020-11-12 application/pdf https://doi.org/10.3390/v12111293 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/v12111293 https://creativecommons.org/licenses/by/4.0/ Viruses; Volume 12; Issue 11; Pages: 1293 bacterial production marine viruses mortality lytic infection lysogeny protozoan grazing carbon cycling HNA LNA Text 2020 ftmdpi https://doi.org/10.3390/v12111293 2023-08-01T00:26:56Z How microbial populations interact influences the availability and flux of organic carbon in the ocean. Understanding how these interactions vary over broad spatial scales is therefore a fundamental aim of microbial oceanography. In this study, we assessed variations in the abundances, production, virus and grazing induced mortality of heterotrophic prokaryotes during summer along a meridional gradient in stratification in the North Atlantic Ocean. Heterotrophic prokaryote abundance and activity varied with phytoplankton biomass, while the relative distribution of prokaryotic subpopulations (ratio of high nucleic acid fluorescent (HNA) and low nucleic acid fluorescent (LNA) cells) was significantly correlated to phytoplankton mortality mode (i.e., viral lysis to grazing rate ratio). Virus-mediate morality was the primary loss process regulating the heterotrophic prokaryotic communities (average 55% of the total mortality), which may be attributed to the strong top-down regulation of the bacterivorous protozoans. Host availability, encounter rate, and HNA:LNA were important factors regulating viral dynamics. Conversely, the abundance and activity of bacterivorous protozoans were largely regulated by temperature and turbulence. The ratio of total microbial mediated mortality to total available prokaryote carbon reveals that over the latitudinal gradient the heterotrophic prokaryote community gradually moved from a near steady state system regulated by high turnover in subtropical region to net heterotrophic production in the temperate region. Text North Atlantic Northeast Atlantic MDPI Open Access Publishing Viruses 12 11 1293 |
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Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
bacterial production marine viruses mortality lytic infection lysogeny protozoan grazing carbon cycling HNA LNA |
spellingShingle |
bacterial production marine viruses mortality lytic infection lysogeny protozoan grazing carbon cycling HNA LNA Kristina D. A. Mojica Corina P. D. Brussaard Significance of Viral Activity for Regulating Heterotrophic Prokaryote Community Dynamics along a Meridional Gradient of Stratification in the Northeast Atlantic Ocean |
topic_facet |
bacterial production marine viruses mortality lytic infection lysogeny protozoan grazing carbon cycling HNA LNA |
description |
How microbial populations interact influences the availability and flux of organic carbon in the ocean. Understanding how these interactions vary over broad spatial scales is therefore a fundamental aim of microbial oceanography. In this study, we assessed variations in the abundances, production, virus and grazing induced mortality of heterotrophic prokaryotes during summer along a meridional gradient in stratification in the North Atlantic Ocean. Heterotrophic prokaryote abundance and activity varied with phytoplankton biomass, while the relative distribution of prokaryotic subpopulations (ratio of high nucleic acid fluorescent (HNA) and low nucleic acid fluorescent (LNA) cells) was significantly correlated to phytoplankton mortality mode (i.e., viral lysis to grazing rate ratio). Virus-mediate morality was the primary loss process regulating the heterotrophic prokaryotic communities (average 55% of the total mortality), which may be attributed to the strong top-down regulation of the bacterivorous protozoans. Host availability, encounter rate, and HNA:LNA were important factors regulating viral dynamics. Conversely, the abundance and activity of bacterivorous protozoans were largely regulated by temperature and turbulence. The ratio of total microbial mediated mortality to total available prokaryote carbon reveals that over the latitudinal gradient the heterotrophic prokaryote community gradually moved from a near steady state system regulated by high turnover in subtropical region to net heterotrophic production in the temperate region. |
format |
Text |
author |
Kristina D. A. Mojica Corina P. D. Brussaard |
author_facet |
Kristina D. A. Mojica Corina P. D. Brussaard |
author_sort |
Kristina D. A. Mojica |
title |
Significance of Viral Activity for Regulating Heterotrophic Prokaryote Community Dynamics along a Meridional Gradient of Stratification in the Northeast Atlantic Ocean |
title_short |
Significance of Viral Activity for Regulating Heterotrophic Prokaryote Community Dynamics along a Meridional Gradient of Stratification in the Northeast Atlantic Ocean |
title_full |
Significance of Viral Activity for Regulating Heterotrophic Prokaryote Community Dynamics along a Meridional Gradient of Stratification in the Northeast Atlantic Ocean |
title_fullStr |
Significance of Viral Activity for Regulating Heterotrophic Prokaryote Community Dynamics along a Meridional Gradient of Stratification in the Northeast Atlantic Ocean |
title_full_unstemmed |
Significance of Viral Activity for Regulating Heterotrophic Prokaryote Community Dynamics along a Meridional Gradient of Stratification in the Northeast Atlantic Ocean |
title_sort |
significance of viral activity for regulating heterotrophic prokaryote community dynamics along a meridional gradient of stratification in the northeast atlantic ocean |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/v12111293 |
op_coverage |
agris |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
Viruses; Volume 12; Issue 11; Pages: 1293 |
op_relation |
https://dx.doi.org/10.3390/v12111293 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/v12111293 |
container_title |
Viruses |
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12 |
container_issue |
11 |
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1293 |
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1774720714065051648 |