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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Online Access: | https://doi.org/10.3390/v12111293 https://doaj.org/article/100b6d1e4620426cbd60a3f2e3e2102e |
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ftdoajarticles:oai:doaj.org/article:100b6d1e4620426cbd60a3f2e3e2102e 2023-05-15T17:34:10+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 2020-11-01T00:00:00Z https://doi.org/10.3390/v12111293 https://doaj.org/article/100b6d1e4620426cbd60a3f2e3e2102e EN eng MDPI AG https://www.mdpi.com/1999-4915/12/11/1293 https://doaj.org/toc/1999-4915 doi:10.3390/v12111293 1999-4915 https://doaj.org/article/100b6d1e4620426cbd60a3f2e3e2102e Viruses, Vol 12, Iss 1293, p 1293 (2020) bacterial production marine viruses mortality lytic infection lysogeny protozoan grazing Microbiology QR1-502 article 2020 ftdoajarticles https://doi.org/10.3390/v12111293 2022-12-31T13:37:41Z 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. Article in Journal/Newspaper North Atlantic Northeast Atlantic Directory of Open Access Journals: DOAJ Articles Viruses 12 11 1293 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
bacterial production marine viruses mortality lytic infection lysogeny protozoan grazing Microbiology QR1-502 |
spellingShingle |
bacterial production marine viruses mortality lytic infection lysogeny protozoan grazing Microbiology QR1-502 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 Microbiology QR1-502 |
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 |
Article in Journal/Newspaper |
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 |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/v12111293 https://doaj.org/article/100b6d1e4620426cbd60a3f2e3e2102e |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
Viruses, Vol 12, Iss 1293, p 1293 (2020) |
op_relation |
https://www.mdpi.com/1999-4915/12/11/1293 https://doaj.org/toc/1999-4915 doi:10.3390/v12111293 1999-4915 https://doaj.org/article/100b6d1e4620426cbd60a3f2e3e2102e |
op_doi |
https://doi.org/10.3390/v12111293 |
container_title |
Viruses |
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12 |
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11 |
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1293 |
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1766132924292268032 |