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: | , , , , , , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
MDPI AG
2020
|
Subjects: | |
Online Access: | http://hdl.handle.net/11567/1027371 https://doi.org/10.3390/microorganisms8091273 |
id |
ftunivgenova:oai:iris.unige.it:11567/1027371 |
---|---|
record_format |
openpolar |
spelling |
ftunivgenova:oai:iris.unige.it:11567/1027371 2024-02-11T09:57:31+01:00 Regulation of microbial activity rates by organic matter in the ross sea during the austral summer 2017 Zaccone R. Misic C. Azzaro F. Azzaro M. Maimone G. Mangoni O. Fusco G. Rappazzo A. C. Ferla R. L. Zaccone, R. Misic, C. Azzaro, F. Azzaro, M. Maimone, G. Mangoni, O. Fusco, G. Rappazzo, A. C. Ferla, R. L. 2020 ELETTRONICO http://hdl.handle.net/11567/1027371 https://doi.org/10.3390/microorganisms8091273 eng eng MDPI AG info:eu-repo/semantics/altIdentifier/pmid/32825597 info:eu-repo/semantics/altIdentifier/wos/WOS:000580029400001 volume:8 firstpage:1 lastpage:25 numberofpages:25 journal:MICROORGANISMS http://hdl.handle.net/11567/1027371 doi:10.3390/microorganisms8091273 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85089705156 Antarctic Ocean Biogeochemical cycle Enzymatic activitie Particulate organic matter Prokaryotes info:eu-repo/semantics/article 2020 ftunivgenova https://doi.org/10.3390/microorganisms8091273 2024-01-17T18:03:12Z 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 Università degli Studi di Genova: CINECA IRIS Antarctic The Antarctic Austral Ross Sea Terra Nova Bay Antarctic Ocean Microorganisms 8 9 1273 |
institution |
Open Polar |
collection |
Università degli Studi di Genova: CINECA IRIS |
op_collection_id |
ftunivgenova |
language |
English |
topic |
Antarctic Ocean Biogeochemical cycle Enzymatic activitie Particulate organic matter Prokaryotes |
spellingShingle |
Antarctic Ocean Biogeochemical cycle Enzymatic activitie Particulate organic matter Prokaryotes Zaccone R. Misic C. Azzaro F. Azzaro M. Maimone G. Mangoni O. Fusco G. Rappazzo A. C. Ferla R. L. Regulation of microbial activity rates by organic matter in the ross sea during the austral summer 2017 |
topic_facet |
Antarctic Ocean Biogeochemical cycle Enzymatic activitie Particulate organic matter Prokaryotes |
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, R. Misic, C. Azzaro, F. Azzaro, M. Maimone, G. Mangoni, O. Fusco, G. Rappazzo, A. C. Ferla, R. L. |
format |
Article in Journal/Newspaper |
author |
Zaccone R. Misic C. Azzaro F. Azzaro M. Maimone G. Mangoni O. Fusco G. Rappazzo A. C. Ferla R. L. |
author_facet |
Zaccone R. Misic C. Azzaro F. Azzaro M. Maimone G. Mangoni O. Fusco G. Rappazzo A. C. Ferla R. L. |
author_sort |
Zaccone R. |
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 |
http://hdl.handle.net/11567/1027371 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/pmid/32825597 info:eu-repo/semantics/altIdentifier/wos/WOS:000580029400001 volume:8 firstpage:1 lastpage:25 numberofpages:25 journal:MICROORGANISMS http://hdl.handle.net/11567/1027371 doi:10.3390/microorganisms8091273 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85089705156 |
op_doi |
https://doi.org/10.3390/microorganisms8091273 |
container_title |
Microorganisms |
container_volume |
8 |
container_issue |
9 |
container_start_page |
1273 |
_version_ |
1790593043835912192 |