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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Online Access: | http://hdl.handle.net/11588/815839 https://doi.org/10.3390/microorganisms8091273 |
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ftunivnapoliiris:oai:www.iris.unina.it:11588/815839 2024-09-09T19:02:18+00:00 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 Zaccone, Renata Misic, Cristina Azzaro, Filippo Azzaro, Maurizio Maimone, Giovanna Mangoni, Olga Fusco, Gianna Rappazzo, Alessandro Ciro La Ferla, Rosabruna 2020 http://hdl.handle.net/11588/815839 https://doi.org/10.3390/microorganisms8091273 unknown info:eu-repo/semantics/altIdentifier/wos/WOS:000580029400001 volume:8 issue:9 firstpage:1273 journal:MICROORGANISMS http://hdl.handle.net/11588/815839 doi:10.3390/microorganisms8091273 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85089705156 info:eu-repo/semantics/openAccess info:eu-repo/semantics/article 2020 ftunivnapoliiris https://doi.org/10.3390/microorganisms8091273 2024-06-17T15:19:34Z 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 IRIS Università degli Studi di Napoli Federico II Antarctic The Antarctic Austral Ross Sea Terra Nova Bay Antarctic Ocean Microorganisms 8 9 1273 |
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IRIS Università degli Studi di Napoli Federico II |
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ftunivnapoliiris |
language |
unknown |
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. |
author2 |
Zaccone, Renata Misic, Cristina Azzaro, Filippo Azzaro, Maurizio Maimone, Giovanna Mangoni, Olga Fusco, Gianna Rappazzo, Alessandro Ciro La Ferla, Rosabruna |
format |
Article in Journal/Newspaper |
author |
Zaccone, Renata Misic, Cristina Azzaro, Filippo Azzaro, Maurizio Maimone, Giovanna Mangoni, Olga Fusco, Gianna Rappazzo, Alessandro Ciro La Ferla, Rosabruna |
spellingShingle |
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 |
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 |
publishDate |
2020 |
url |
http://hdl.handle.net/11588/815839 https://doi.org/10.3390/microorganisms8091273 |
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_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000580029400001 volume:8 issue:9 firstpage:1273 journal:MICROORGANISMS http://hdl.handle.net/11588/815839 doi:10.3390/microorganisms8091273 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85089705156 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/microorganisms8091273 |
container_title |
Microorganisms |
container_volume |
8 |
container_issue |
9 |
container_start_page |
1273 |
_version_ |
1809816461519093760 |