Biogeography of the Southern Ocean: environmental factors driving mesoplankton distribution South of Africa
Spatial distribution of zooplankton communities depends on numerous factors, especially temperature and salinity conditions (hydrological factor), sampled depth, chlorophyll concentration, and diel cycle. We analyzed and compared the impact of these factors on mesoplankton abundance, biodiversity, q...
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ftdoajarticles:oai:doaj.org/article:88349f0977ee4076927065f4d8d1bba5 2024-01-07T09:38:30+01:00 Biogeography of the Southern Ocean: environmental factors driving mesoplankton distribution South of Africa Alexander Vereshchaka Eteri Musaeva Anastasiia Lunina 2021-05-01T00:00:00Z https://doi.org/10.7717/peerj.11411 https://doaj.org/article/88349f0977ee4076927065f4d8d1bba5 EN eng PeerJ Inc. https://peerj.com/articles/11411.pdf https://peerj.com/articles/11411/ https://doaj.org/toc/2167-8359 doi:10.7717/peerj.11411 2167-8359 https://doaj.org/article/88349f0977ee4076927065f4d8d1bba5 PeerJ, Vol 9, p e11411 (2021) Zooplankton Southern ocean Distribution Environmental factors Medicine R Biology (General) QH301-705.5 article 2021 ftdoajarticles https://doi.org/10.7717/peerj.11411 2023-12-10T01:50:03Z Spatial distribution of zooplankton communities depends on numerous factors, especially temperature and salinity conditions (hydrological factor), sampled depth, chlorophyll concentration, and diel cycle. We analyzed and compared the impact of these factors on mesoplankton abundance, biodiversity, quantitative structure based on proportion of taxa and qualitative structure based on presence/absence of taxa in the Southern Ocean. Samples (43 stations, three vertical strata sampled at each station, 163 taxa identified) were collected with a Juday net along the SR02 transect in December 2009. Mesoplankton abundance in discrete vertical layers ranged from 0.2 to 13,743.6 ind. m−3, i.e., five orders of magnitude, maximal and minimal values were recorded in the upper mixed and in the deepest layer, respectively. Within the combined 300-m layer, abundances ranged from 16.0 to 1,455.0 ind. m−3, i.e., two orders of magnitude suggesting that integral samples provide little information about actual variations of mesoplankton abundances. A set of analyses showed that depth was the major driver of mesoplankton distribution (abundance, biodiversity, quantitative structure), hydrological factors influenced two of them (quantitative and qualitative structure), chlorophyll concentration strongly affected only quantitative structure, and diel cycle had an insignificant effect on mesoplankton distribution. Using our current knowledge of the fine structure of the Antarctic Circumpolar Current, we compared effects of four hydrological fronts, i.e., boundaries between different water-masses with distinct environmental characteristics, and eight dynamic jets (narrow yet very intense currents) on mesoplankton distribution. Subtropical, Polar, and Subantarctic Fronts drove quantitative and qualitative structure of mesoplankton assemblages (decreasing in order of influence), while the Southern Boundary affected only qualitative structure. Effects of dynamic jets were insignificant. We suggest that mesoplankton composition is driven by ... Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic PeerJ 9 e11411 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Zooplankton Southern ocean Distribution Environmental factors Medicine R Biology (General) QH301-705.5 |
spellingShingle |
Zooplankton Southern ocean Distribution Environmental factors Medicine R Biology (General) QH301-705.5 Alexander Vereshchaka Eteri Musaeva Anastasiia Lunina Biogeography of the Southern Ocean: environmental factors driving mesoplankton distribution South of Africa |
topic_facet |
Zooplankton Southern ocean Distribution Environmental factors Medicine R Biology (General) QH301-705.5 |
description |
Spatial distribution of zooplankton communities depends on numerous factors, especially temperature and salinity conditions (hydrological factor), sampled depth, chlorophyll concentration, and diel cycle. We analyzed and compared the impact of these factors on mesoplankton abundance, biodiversity, quantitative structure based on proportion of taxa and qualitative structure based on presence/absence of taxa in the Southern Ocean. Samples (43 stations, three vertical strata sampled at each station, 163 taxa identified) were collected with a Juday net along the SR02 transect in December 2009. Mesoplankton abundance in discrete vertical layers ranged from 0.2 to 13,743.6 ind. m−3, i.e., five orders of magnitude, maximal and minimal values were recorded in the upper mixed and in the deepest layer, respectively. Within the combined 300-m layer, abundances ranged from 16.0 to 1,455.0 ind. m−3, i.e., two orders of magnitude suggesting that integral samples provide little information about actual variations of mesoplankton abundances. A set of analyses showed that depth was the major driver of mesoplankton distribution (abundance, biodiversity, quantitative structure), hydrological factors influenced two of them (quantitative and qualitative structure), chlorophyll concentration strongly affected only quantitative structure, and diel cycle had an insignificant effect on mesoplankton distribution. Using our current knowledge of the fine structure of the Antarctic Circumpolar Current, we compared effects of four hydrological fronts, i.e., boundaries between different water-masses with distinct environmental characteristics, and eight dynamic jets (narrow yet very intense currents) on mesoplankton distribution. Subtropical, Polar, and Subantarctic Fronts drove quantitative and qualitative structure of mesoplankton assemblages (decreasing in order of influence), while the Southern Boundary affected only qualitative structure. Effects of dynamic jets were insignificant. We suggest that mesoplankton composition is driven by ... |
format |
Article in Journal/Newspaper |
author |
Alexander Vereshchaka Eteri Musaeva Anastasiia Lunina |
author_facet |
Alexander Vereshchaka Eteri Musaeva Anastasiia Lunina |
author_sort |
Alexander Vereshchaka |
title |
Biogeography of the Southern Ocean: environmental factors driving mesoplankton distribution South of Africa |
title_short |
Biogeography of the Southern Ocean: environmental factors driving mesoplankton distribution South of Africa |
title_full |
Biogeography of the Southern Ocean: environmental factors driving mesoplankton distribution South of Africa |
title_fullStr |
Biogeography of the Southern Ocean: environmental factors driving mesoplankton distribution South of Africa |
title_full_unstemmed |
Biogeography of the Southern Ocean: environmental factors driving mesoplankton distribution South of Africa |
title_sort |
biogeography of the southern ocean: environmental factors driving mesoplankton distribution south of africa |
publisher |
PeerJ Inc. |
publishDate |
2021 |
url |
https://doi.org/10.7717/peerj.11411 https://doaj.org/article/88349f0977ee4076927065f4d8d1bba5 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
PeerJ, Vol 9, p e11411 (2021) |
op_relation |
https://peerj.com/articles/11411.pdf https://peerj.com/articles/11411/ https://doaj.org/toc/2167-8359 doi:10.7717/peerj.11411 2167-8359 https://doaj.org/article/88349f0977ee4076927065f4d8d1bba5 |
op_doi |
https://doi.org/10.7717/peerj.11411 |
container_title |
PeerJ |
container_volume |
9 |
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e11411 |
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1787423550048567296 |