Mesozooplankton structure and functioning during the onset of the Kerguelen phytoplankton bloom during the KEOPS2 survey
This paper presents results on the spatial and temporal distribution patterns of mesozooplankton in the naturally fertilized region to the east of the Kerguelen Islands (Southern Ocean) visited at early bloom stage during the KEOPS2 survey (15 October to 20 November 2011). The aim of this study was...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2015
|
Subjects: | |
Online Access: | https://doi.org/10.5194/bg-12-4543-2015 https://doaj.org/article/b11ec4420c46488bb84e742004487b05 |
id |
ftdoajarticles:oai:doaj.org/article:b11ec4420c46488bb84e742004487b05 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:b11ec4420c46488bb84e742004487b05 2023-05-15T17:02:09+02:00 Mesozooplankton structure and functioning during the onset of the Kerguelen phytoplankton bloom during the KEOPS2 survey F. Carlotti M.-P. Jouandet A. Nowaczyk M. Harmelin-Vivien D. Lefèvre P. Richard Y. Zhu M. Zhou 2015-07-01T00:00:00Z https://doi.org/10.5194/bg-12-4543-2015 https://doaj.org/article/b11ec4420c46488bb84e742004487b05 EN eng Copernicus Publications http://www.biogeosciences.net/12/4543/2015/bg-12-4543-2015.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-12-4543-2015 https://doaj.org/article/b11ec4420c46488bb84e742004487b05 Biogeosciences, Vol 12, Iss 14, Pp 4543-4563 (2015) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/bg-12-4543-2015 2022-12-31T00:20:43Z This paper presents results on the spatial and temporal distribution patterns of mesozooplankton in the naturally fertilized region to the east of the Kerguelen Islands (Southern Ocean) visited at early bloom stage during the KEOPS2 survey (15 October to 20 November 2011). The aim of this study was to compare the zooplankton response in contrasted environments localized over the Kerguelen Plateau in waters of the east shelf and shelf edge and in productive oceanic deep waters characterized by conditions of complex circulation and rapidly changing phytoplankton biomass. The mesozooplankton community responded to the spring bloom earlier on the plateau than in the oceanic waters, where complex mesoscale circulation stimulated initial more or less ephemeral blooms before a broader bloom extension. Taxonomic compositions showed a high degree of similarity across the whole region, and the populations initially responded to spring bloom with a large production of larval forms increasing abundances, without biomass changes. Taxonomic composition and stable isotope ratios of size-fractionated zooplankton indicated the strong domination of herbivores, and the total zooplankton biomass values over the survey presented a significant correlation with the integrated chlorophyll concentrations in the mixed layer. The biomass stocks observed at the beginning of the KEOPS2 cruise were around 1.7 g C m −2 above the plateau and 1.2 g C m −2 in oceanic waters. Zooplankton biomass in oceanic waters remained on average below 2 g C m −2 over the study period, except for one station in the Polar Front zone (F-L), whereas zooplankton biomasses were around 4 g C m −2 on the plateau at the end of the survey. The most remarkable feature during the sampling period was the stronger increase in abundance in the oceanic waters (25 × 10 3 to 160 × 10 3 ind m −2 ) than on the plateau (25 × 10 3 to 90 × 10 3 ind m −2 ). The size structure and taxonomic distribution patterns revealed a cumulative contribution of various larval stages of dominant ... Article in Journal/Newspaper Kerguelen Islands Mesozooplankton Southern Ocean Directory of Open Access Journals: DOAJ Articles Kerguelen Kerguelen Islands Southern Ocean Biogeosciences 12 14 4543 4563 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 F. Carlotti M.-P. Jouandet A. Nowaczyk M. Harmelin-Vivien D. Lefèvre P. Richard Y. Zhu M. Zhou Mesozooplankton structure and functioning during the onset of the Kerguelen phytoplankton bloom during the KEOPS2 survey |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
This paper presents results on the spatial and temporal distribution patterns of mesozooplankton in the naturally fertilized region to the east of the Kerguelen Islands (Southern Ocean) visited at early bloom stage during the KEOPS2 survey (15 October to 20 November 2011). The aim of this study was to compare the zooplankton response in contrasted environments localized over the Kerguelen Plateau in waters of the east shelf and shelf edge and in productive oceanic deep waters characterized by conditions of complex circulation and rapidly changing phytoplankton biomass. The mesozooplankton community responded to the spring bloom earlier on the plateau than in the oceanic waters, where complex mesoscale circulation stimulated initial more or less ephemeral blooms before a broader bloom extension. Taxonomic compositions showed a high degree of similarity across the whole region, and the populations initially responded to spring bloom with a large production of larval forms increasing abundances, without biomass changes. Taxonomic composition and stable isotope ratios of size-fractionated zooplankton indicated the strong domination of herbivores, and the total zooplankton biomass values over the survey presented a significant correlation with the integrated chlorophyll concentrations in the mixed layer. The biomass stocks observed at the beginning of the KEOPS2 cruise were around 1.7 g C m −2 above the plateau and 1.2 g C m −2 in oceanic waters. Zooplankton biomass in oceanic waters remained on average below 2 g C m −2 over the study period, except for one station in the Polar Front zone (F-L), whereas zooplankton biomasses were around 4 g C m −2 on the plateau at the end of the survey. The most remarkable feature during the sampling period was the stronger increase in abundance in the oceanic waters (25 × 10 3 to 160 × 10 3 ind m −2 ) than on the plateau (25 × 10 3 to 90 × 10 3 ind m −2 ). The size structure and taxonomic distribution patterns revealed a cumulative contribution of various larval stages of dominant ... |
format |
Article in Journal/Newspaper |
author |
F. Carlotti M.-P. Jouandet A. Nowaczyk M. Harmelin-Vivien D. Lefèvre P. Richard Y. Zhu M. Zhou |
author_facet |
F. Carlotti M.-P. Jouandet A. Nowaczyk M. Harmelin-Vivien D. Lefèvre P. Richard Y. Zhu M. Zhou |
author_sort |
F. Carlotti |
title |
Mesozooplankton structure and functioning during the onset of the Kerguelen phytoplankton bloom during the KEOPS2 survey |
title_short |
Mesozooplankton structure and functioning during the onset of the Kerguelen phytoplankton bloom during the KEOPS2 survey |
title_full |
Mesozooplankton structure and functioning during the onset of the Kerguelen phytoplankton bloom during the KEOPS2 survey |
title_fullStr |
Mesozooplankton structure and functioning during the onset of the Kerguelen phytoplankton bloom during the KEOPS2 survey |
title_full_unstemmed |
Mesozooplankton structure and functioning during the onset of the Kerguelen phytoplankton bloom during the KEOPS2 survey |
title_sort |
mesozooplankton structure and functioning during the onset of the kerguelen phytoplankton bloom during the keops2 survey |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/bg-12-4543-2015 https://doaj.org/article/b11ec4420c46488bb84e742004487b05 |
geographic |
Kerguelen Kerguelen Islands Southern Ocean |
geographic_facet |
Kerguelen Kerguelen Islands Southern Ocean |
genre |
Kerguelen Islands Mesozooplankton Southern Ocean |
genre_facet |
Kerguelen Islands Mesozooplankton Southern Ocean |
op_source |
Biogeosciences, Vol 12, Iss 14, Pp 4543-4563 (2015) |
op_relation |
http://www.biogeosciences.net/12/4543/2015/bg-12-4543-2015.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-12-4543-2015 https://doaj.org/article/b11ec4420c46488bb84e742004487b05 |
op_doi |
https://doi.org/10.5194/bg-12-4543-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
14 |
container_start_page |
4543 |
op_container_end_page |
4563 |
_version_ |
1766055408868261888 |