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...
Published in: | Microorganisms |
---|---|
Main Authors: | , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
MDPI
2020
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7569985/ http://www.ncbi.nlm.nih.gov/pubmed/32825597 https://doi.org/10.3390/microorganisms8091273 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:7569985 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:7569985 2023-05-15T14:00:43+02:00 Regulation of Microbial Activity Rates by Organic Matter in the Ross Sea during the Austral Summer 2017 Zaccone, Renata Misic, Cristina Azzaro, Filippo Azzaro, Maurizio Maimone, Giovanna Mangoni, Olga Fusco, Gianna Rappazzo, Alessandro Ciro La Ferla, Rosabruna 2020-08-21 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7569985/ http://www.ncbi.nlm.nih.gov/pubmed/32825597 https://doi.org/10.3390/microorganisms8091273 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7569985/ http://www.ncbi.nlm.nih.gov/pubmed/32825597 http://dx.doi.org/10.3390/microorganisms8091273 © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). CC-BY Microorganisms Article Text 2020 ftpubmed https://doi.org/10.3390/microorganisms8091273 2020-11-01T01:34:17Z 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 PubMed Central (PMC) Antarctic Antarctic Ocean Austral Ross Sea Terra Nova Bay The Antarctic Microorganisms 8 9 1273 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Article |
spellingShingle |
Article Zaccone, Renata Misic, Cristina Azzaro, Filippo Azzaro, Maurizio Maimone, Giovanna Mangoni, Olga Fusco, Gianna Rappazzo, Alessandro Ciro La Ferla, Rosabruna Regulation of Microbial Activity Rates by Organic Matter in the Ross Sea during the Austral Summer 2017 |
topic_facet |
Article |
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 |
Zaccone, Renata Misic, Cristina Azzaro, Filippo Azzaro, Maurizio Maimone, Giovanna Mangoni, Olga Fusco, Gianna Rappazzo, Alessandro Ciro La Ferla, Rosabruna |
author_facet |
Zaccone, Renata Misic, Cristina Azzaro, Filippo Azzaro, Maurizio Maimone, Giovanna Mangoni, Olga Fusco, Gianna Rappazzo, Alessandro Ciro La Ferla, Rosabruna |
author_sort |
Zaccone, Renata |
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 |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7569985/ http://www.ncbi.nlm.nih.gov/pubmed/32825597 https://doi.org/10.3390/microorganisms8091273 |
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 |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7569985/ http://www.ncbi.nlm.nih.gov/pubmed/32825597 http://dx.doi.org/10.3390/microorganisms8091273 |
op_rights |
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3390/microorganisms8091273 |
container_title |
Microorganisms |
container_volume |
8 |
container_issue |
9 |
container_start_page |
1273 |
_version_ |
1766270047672598528 |