Regulation of Microbial Activity Rates by Organic Matter in the Ross Sea during the Austral Summer 2017

The active prokaryotic communities proliferate in the ecosystems of the Antarctic Ocean, participating in biogeochemical cycles and supporting higher trophic levels. They are regulated by several environmental and ecological forcing, such as the characteristics of the water masses subjected to globa...

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Published in:Microorganisms
Main Authors: Renata Zaccone, Cristina Misic, Filippo Azzaro, Maurizio Azzaro, Giovanna Maimone, Olga Mangoni, Giannetta Fusco, Alessandro Rappazzo, Rosabruna La Ferla
Format: Text
Language:English
Published: Multidisciplinary Digital Publishing Institute 2020
Subjects:
Online Access:https://doi.org/10.3390/microorganisms8091273
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spelling ftmdpi:oai:mdpi.com:/2076-2607/8/9/1273/ 2023-08-20T04:02:31+02:00 Regulation of Microbial Activity Rates by Organic Matter in the Ross Sea during the Austral Summer 2017 Renata Zaccone Cristina Misic Filippo Azzaro Maurizio Azzaro Giovanna Maimone Olga Mangoni Giannetta Fusco Alessandro Rappazzo Rosabruna La Ferla agris 2020-08-21 application/pdf https://doi.org/10.3390/microorganisms8091273 EN eng Multidisciplinary Digital Publishing Institute Environmental Microbiology https://dx.doi.org/10.3390/microorganisms8091273 https://creativecommons.org/licenses/by/4.0/ Microorganisms; Volume 8; Issue 9; Pages: 1273 Antarctic Ocean biogeochemical cycles prokaryotes enzymatic activities particulate organic matter Text 2020 ftmdpi https://doi.org/10.3390/microorganisms8091273 2023-07-31T23:57:45Z The active prokaryotic communities proliferate in the ecosystems of the Antarctic Ocean, participating in biogeochemical cycles and supporting higher trophic levels. They are regulated by several environmental and ecological forcing, such as the characteristics of the water masses subjected to global warming and particulate organic matter (POM). During summer 2017, two polynyas in the Ross Sea were studied to evaluate key-microbiological parameters (the proteasic, glucosidasic, and phosphatasic activities, the microbial respiratory rates, the prokaryotic abundance and biomass) in relation to quantitative and qualitative characteristics of POM. Results showed significant differences in the epipelagic layer between two macro-areas (Terra Nova Bay and Ross Sea offshore area). Proteins and carbohydrates were metabolized rapidly in the offshore area (as shown by turnover times), due to high enzymatic activities in this zone, indicating fresh and labile organic compounds. The lower quality of POM in Terra Nova Bay, as shown by the higher refractory fraction, led to an increase in the turnover times of proteins and carbohydrates. Salinity was the physical constraint that played a major role in the distribution of POM and microbial activities in both areas. Text Antarc* Antarctic Antarctic Ocean Ross Sea MDPI Open Access Publishing Antarctic The Antarctic Austral Ross Sea Terra Nova Bay Antarctic Ocean Microorganisms 8 9 1273
institution Open Polar
collection MDPI Open Access Publishing
op_collection_id ftmdpi
language English
topic Antarctic Ocean
biogeochemical cycles
prokaryotes
enzymatic activities
particulate organic matter
spellingShingle Antarctic Ocean
biogeochemical cycles
prokaryotes
enzymatic activities
particulate organic matter
Renata Zaccone
Cristina Misic
Filippo Azzaro
Maurizio Azzaro
Giovanna Maimone
Olga Mangoni
Giannetta Fusco
Alessandro Rappazzo
Rosabruna La Ferla
Regulation of Microbial Activity Rates by Organic Matter in the Ross Sea during the Austral Summer 2017
topic_facet Antarctic Ocean
biogeochemical cycles
prokaryotes
enzymatic activities
particulate organic matter
description The active prokaryotic communities proliferate in the ecosystems of the Antarctic Ocean, participating in biogeochemical cycles and supporting higher trophic levels. They are regulated by several environmental and ecological forcing, such as the characteristics of the water masses subjected to global warming and particulate organic matter (POM). During summer 2017, two polynyas in the Ross Sea were studied to evaluate key-microbiological parameters (the proteasic, glucosidasic, and phosphatasic activities, the microbial respiratory rates, the prokaryotic abundance and biomass) in relation to quantitative and qualitative characteristics of POM. Results showed significant differences in the epipelagic layer between two macro-areas (Terra Nova Bay and Ross Sea offshore area). Proteins and carbohydrates were metabolized rapidly in the offshore area (as shown by turnover times), due to high enzymatic activities in this zone, indicating fresh and labile organic compounds. The lower quality of POM in Terra Nova Bay, as shown by the higher refractory fraction, led to an increase in the turnover times of proteins and carbohydrates. Salinity was the physical constraint that played a major role in the distribution of POM and microbial activities in both areas.
format Text
author Renata Zaccone
Cristina Misic
Filippo Azzaro
Maurizio Azzaro
Giovanna Maimone
Olga Mangoni
Giannetta Fusco
Alessandro Rappazzo
Rosabruna La Ferla
author_facet Renata Zaccone
Cristina Misic
Filippo Azzaro
Maurizio Azzaro
Giovanna Maimone
Olga Mangoni
Giannetta Fusco
Alessandro Rappazzo
Rosabruna La Ferla
author_sort Renata Zaccone
title Regulation of Microbial Activity Rates by Organic Matter in the Ross Sea during the Austral Summer 2017
title_short Regulation of Microbial Activity Rates by Organic Matter in the Ross Sea during the Austral Summer 2017
title_full Regulation of Microbial Activity Rates by Organic Matter in the Ross Sea during the Austral Summer 2017
title_fullStr Regulation of Microbial Activity Rates by Organic Matter in the Ross Sea during the Austral Summer 2017
title_full_unstemmed Regulation of Microbial Activity Rates by Organic Matter in the Ross Sea during the Austral Summer 2017
title_sort regulation of microbial activity rates by organic matter in the ross sea during the austral summer 2017
publisher Multidisciplinary Digital Publishing Institute
publishDate 2020
url https://doi.org/10.3390/microorganisms8091273
op_coverage agris
geographic Antarctic
The Antarctic
Austral
Ross Sea
Terra Nova Bay
Antarctic Ocean
geographic_facet Antarctic
The Antarctic
Austral
Ross Sea
Terra Nova Bay
Antarctic Ocean
genre Antarc*
Antarctic
Antarctic Ocean
Ross Sea
genre_facet Antarc*
Antarctic
Antarctic Ocean
Ross Sea
op_source Microorganisms; Volume 8; Issue 9; Pages: 1273
op_relation Environmental Microbiology
https://dx.doi.org/10.3390/microorganisms8091273
op_rights https://creativecommons.org/licenses/by/4.0/
op_doi https://doi.org/10.3390/microorganisms8091273
container_title Microorganisms
container_volume 8
container_issue 9
container_start_page 1273
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