The trophic role and ecological implications of oval faecal pellets in Terra Nova Bay (Ross Sea)
We studied the role of oval faecal pellets in the carbon-cycle dynamics of the Antarctic coastal area in a laboratory experiment on pellet degradation over time. We observed a rapid increase in the bacterial biomass until 56 h (from 14.73 to 91.09 lgC/l), but a drop to 25.83 lgC/l at the end of the...
Published in: | Polar Biology |
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Language: | English |
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Springer Verlag Germany:Tiergartenstrasse 17, D 69121 Heidelberg Germany:011 49 6221 3450, EMAIL: g.braun@springer.de, INTERNET: http://www.springer.de, Fax: 011 49 6221 345229
2003
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Online Access: | http://hdl.handle.net/11567/247096 https://doi.org/10.1007/s00300-003-0485-0 |
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ftunivgenova:oai:iris.unige.it:11567/247096 2024-02-11T09:58:46+01:00 The trophic role and ecological implications of oval faecal pellets in Terra Nova Bay (Ross Sea) POVERO, PAOLO MISIC, CRISTINA CASTELLANO, MICHELA FABIANO, MAURO OSSOLA C. Povero, Paolo Misic, Cristina Ossola, C. Castellano, Michela Fabiano, Mauro 2003 STAMPA http://hdl.handle.net/11567/247096 https://doi.org/10.1007/s00300-003-0485-0 eng eng Springer Verlag Germany:Tiergartenstrasse 17, D 69121 Heidelberg Germany:011 49 6221 3450, EMAIL: g.braun@springer.de, INTERNET: http://www.springer.de, Fax: 011 49 6221 345229 info:eu-repo/semantics/altIdentifier/wos/WOS:000183122000003 volume:26 firstpage:302 lastpage:310 numberofpages:9 journal:POLAR BIOLOGY http://hdl.handle.net/11567/247096 doi:10.1007/s00300-003-0485-0 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0038614692 info:eu-repo/semantics/article 2003 ftunivgenova https://doi.org/10.1007/s00300-003-0485-0 2024-01-24T17:34:47Z We studied the role of oval faecal pellets in the carbon-cycle dynamics of the Antarctic coastal area in a laboratory experiment on pellet degradation over time. We observed a rapid increase in the bacterial biomass until 56 h (from 14.73 to 91.09 lgC/l), but a drop to 25.83 lgC/l at the end of the experiment. Dissolved proteins decreased rapidly (from 1,342.7 to 1,177.0 lg/l in the first 32 h) as did nitrate (from 1 to 0.43 lM in the first 56 h), confirming their consumption by microorganisms, but they were observed to increase in the second part of the experiment, up to 1,618.3 lg/l and 17.36 lM for the dissolved proteins and nitrate, respectively. The proteolytic activity increased throughout the incubation from 302.65 nmol/l per hour to 6,641.08 nmol/l per hour, especially in the second half of the experiment. Therefore, we concluded that the microbial community is able to produce, consume and remineralise the available organic substrates and to increase organic-pool quality and inorganic nutrient concentrations dissolved in the overlying water. Article in Journal/Newspaper Antarc* Antarctic Ross Sea Università degli Studi di Genova: CINECA IRIS Antarctic The Antarctic Ross Sea Terra Nova Bay Polar Biology 26 5 302 310 |
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Open Polar |
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Università degli Studi di Genova: CINECA IRIS |
op_collection_id |
ftunivgenova |
language |
English |
description |
We studied the role of oval faecal pellets in the carbon-cycle dynamics of the Antarctic coastal area in a laboratory experiment on pellet degradation over time. We observed a rapid increase in the bacterial biomass until 56 h (from 14.73 to 91.09 lgC/l), but a drop to 25.83 lgC/l at the end of the experiment. Dissolved proteins decreased rapidly (from 1,342.7 to 1,177.0 lg/l in the first 32 h) as did nitrate (from 1 to 0.43 lM in the first 56 h), confirming their consumption by microorganisms, but they were observed to increase in the second part of the experiment, up to 1,618.3 lg/l and 17.36 lM for the dissolved proteins and nitrate, respectively. The proteolytic activity increased throughout the incubation from 302.65 nmol/l per hour to 6,641.08 nmol/l per hour, especially in the second half of the experiment. Therefore, we concluded that the microbial community is able to produce, consume and remineralise the available organic substrates and to increase organic-pool quality and inorganic nutrient concentrations dissolved in the overlying water. |
author2 |
Povero, Paolo Misic, Cristina Ossola, C. Castellano, Michela Fabiano, Mauro |
format |
Article in Journal/Newspaper |
author |
POVERO, PAOLO MISIC, CRISTINA CASTELLANO, MICHELA FABIANO, MAURO OSSOLA C. |
spellingShingle |
POVERO, PAOLO MISIC, CRISTINA CASTELLANO, MICHELA FABIANO, MAURO OSSOLA C. The trophic role and ecological implications of oval faecal pellets in Terra Nova Bay (Ross Sea) |
author_facet |
POVERO, PAOLO MISIC, CRISTINA CASTELLANO, MICHELA FABIANO, MAURO OSSOLA C. |
author_sort |
POVERO, PAOLO |
title |
The trophic role and ecological implications of oval faecal pellets in Terra Nova Bay (Ross Sea) |
title_short |
The trophic role and ecological implications of oval faecal pellets in Terra Nova Bay (Ross Sea) |
title_full |
The trophic role and ecological implications of oval faecal pellets in Terra Nova Bay (Ross Sea) |
title_fullStr |
The trophic role and ecological implications of oval faecal pellets in Terra Nova Bay (Ross Sea) |
title_full_unstemmed |
The trophic role and ecological implications of oval faecal pellets in Terra Nova Bay (Ross Sea) |
title_sort |
trophic role and ecological implications of oval faecal pellets in terra nova bay (ross sea) |
publisher |
Springer Verlag Germany:Tiergartenstrasse 17, D 69121 Heidelberg Germany:011 49 6221 3450, EMAIL: g.braun@springer.de, INTERNET: http://www.springer.de, Fax: 011 49 6221 345229 |
publishDate |
2003 |
url |
http://hdl.handle.net/11567/247096 https://doi.org/10.1007/s00300-003-0485-0 |
geographic |
Antarctic The Antarctic Ross Sea Terra Nova Bay |
geographic_facet |
Antarctic The Antarctic Ross Sea Terra Nova Bay |
genre |
Antarc* Antarctic Ross Sea |
genre_facet |
Antarc* Antarctic Ross Sea |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000183122000003 volume:26 firstpage:302 lastpage:310 numberofpages:9 journal:POLAR BIOLOGY http://hdl.handle.net/11567/247096 doi:10.1007/s00300-003-0485-0 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0038614692 |
op_doi |
https://doi.org/10.1007/s00300-003-0485-0 |
container_title |
Polar Biology |
container_volume |
26 |
container_issue |
5 |
container_start_page |
302 |
op_container_end_page |
310 |
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1790594521583583232 |