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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ftdoajarticles:oai:doaj.org/article:ff8f9e90692642ab90f1963464f95916 2023-05-15T13:59:44+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 Gianna Fusco Alessandro Ciro Rappazzo Rosabruna La Ferla 2020-08-01T00:00:00Z https://doi.org/10.3390/microorganisms8091273 https://doaj.org/article/ff8f9e90692642ab90f1963464f95916 EN eng MDPI AG https://www.mdpi.com/2076-2607/8/9/1273 https://doaj.org/toc/2076-2607 doi:10.3390/microorganisms8091273 2076-2607 https://doaj.org/article/ff8f9e90692642ab90f1963464f95916 Microorganisms, Vol 8, Iss 1273, p 1273 (2020) Antarctic Ocean biogeochemical cycles prokaryotes enzymatic activities particulate organic matter Biology (General) QH301-705.5 article 2020 ftdoajarticles https://doi.org/10.3390/microorganisms8091273 2022-12-31T03:42:04Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Ross Sea Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Ocean Austral Ross Sea Terra Nova Bay The Antarctic Microorganisms 8 9 1273 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic Ocean biogeochemical cycles prokaryotes enzymatic activities particulate organic matter Biology (General) QH301-705.5 |
spellingShingle |
Antarctic Ocean biogeochemical cycles prokaryotes enzymatic activities particulate organic matter Biology (General) QH301-705.5 Renata Zaccone Cristina Misic Filippo Azzaro Maurizio Azzaro Giovanna Maimone Olga Mangoni Gianna Fusco Alessandro Ciro 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 Biology (General) QH301-705.5 |
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 |
Article in Journal/Newspaper |
author |
Renata Zaccone Cristina Misic Filippo Azzaro Maurizio Azzaro Giovanna Maimone Olga Mangoni Gianna Fusco Alessandro Ciro Rappazzo Rosabruna La Ferla |
author_facet |
Renata Zaccone Cristina Misic Filippo Azzaro Maurizio Azzaro Giovanna Maimone Olga Mangoni Gianna Fusco Alessandro Ciro 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 |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/microorganisms8091273 https://doaj.org/article/ff8f9e90692642ab90f1963464f95916 |
geographic |
Antarctic Antarctic Ocean Austral Ross Sea Terra Nova Bay The Antarctic |
geographic_facet |
Antarctic Antarctic Ocean Austral Ross Sea Terra Nova Bay The Antarctic |
genre |
Antarc* Antarctic Antarctic Ocean Ross Sea |
genre_facet |
Antarc* Antarctic Antarctic Ocean Ross Sea |
op_source |
Microorganisms, Vol 8, Iss 1273, p 1273 (2020) |
op_relation |
https://www.mdpi.com/2076-2607/8/9/1273 https://doaj.org/toc/2076-2607 doi:10.3390/microorganisms8091273 2076-2607 https://doaj.org/article/ff8f9e90692642ab90f1963464f95916 |
op_doi |
https://doi.org/10.3390/microorganisms8091273 |
container_title |
Microorganisms |
container_volume |
8 |
container_issue |
9 |
container_start_page |
1273 |
_version_ |
1766268501207547904 |