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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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 |
_version_ |
1774712994168569856 |