Seasonal variations of siliceous microplankton fluxes and radiolarian assemblages linked to environmental conditions in Prydz Bay polynya, Eastern Antarctica
Siliceous microplankton is an effective proxy for connecting modern and past marine environments; however, radiolarians have been understudied in Prydz Bay, Eastern Antarctica. This study investigated the changes in the siliceous microbiota fluxes and radiolarian assemblages captured in a 1-year tim...
Published in: | Frontiers in Marine Science |
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2023
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Online Access: | https://doi.org/10.3389/fmars.2023.1135900 https://doaj.org/article/6da32f77ea3d4f66bba2aa2183b1e833 |
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ftdoajarticles:oai:doaj.org/article:6da32f77ea3d4f66bba2aa2183b1e833 2023-06-11T04:04:08+02:00 Seasonal variations of siliceous microplankton fluxes and radiolarian assemblages linked to environmental conditions in Prydz Bay polynya, Eastern Antarctica Haifeng Zhang Rujian Wang Zhengbing Han Yongming Sun Gaojing Fan Jun Zhao Ji Hu Jian Ren Jianming Pan 2023-04-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1135900 https://doaj.org/article/6da32f77ea3d4f66bba2aa2183b1e833 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1135900/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1135900 https://doaj.org/article/6da32f77ea3d4f66bba2aa2183b1e833 Frontiers in Marine Science, Vol 10 (2023) Prydz Bay siliceous microplankton flux radiolarian assemblage seasonal variation polynya primary productivity Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.1135900 2023-04-23T00:32:41Z Siliceous microplankton is an effective proxy for connecting modern and past marine environments; however, radiolarians have been understudied in Prydz Bay, Eastern Antarctica. This study investigated the changes in the siliceous microbiota fluxes and radiolarian assemblages captured in a 1-year time-series sediment trap (February 2014 to February 2015, ~490 m water depth) in the polynya of Prydz Bay. The results exhibited the strong seasonality in the radiolarian assemblages and the fluxes of radiolarians, diatoms, silicoflagellates and sponge spicules, with low numbers in winter and high numbers in summer. Seasonal variations in the sea ice and plankton community were critical in these patterns. The total radiolarian flux (TRF) displayed three peaks with higher flux than the annual average TRF over the year, all of which occurred in summer. These TRF peaks were mainly driven by seasonal fluctuations of sea ice, primary productivity, grazing pressure caused by phytophagous zooplankton and resuspension of small radiolarians in the surface sediments induced by modified Circumpolar Deep Water (mCDW) intrusion onto the shelf. There were also two notable low-TRF stages, mainly related to full sea-ice coverage and high grazing pressure. Two dominant assemblages were recognized by means of Q-factor analysis. Dominant assemblage one was composed of three small-sized taxa, Antarctissa sp., Phormacantha hystrix and Plectacantha oikiskos, which could be used as a proxy for primary productivity in the Marginal Ice Zone (MIZ) in Prydz Bay. Dominant assemblage two was composed of Antarctissa strelkovi and Antarctissa denticulata, with A. strelkovi dominating. The high flux and high relative abundance of A. strelkovi marked the extension of Ice Shelf Water (ISW) to the shelf area in Prydz Bay. These findings will provide new insights and reliable proxies for modern and paleoceanographic research in the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Prydz Bay Sea ice Southern Ocean Directory of Open Access Journals: DOAJ Articles Prydz Bay Southern Ocean Frontiers in Marine Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Prydz Bay siliceous microplankton flux radiolarian assemblage seasonal variation polynya primary productivity Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Prydz Bay siliceous microplankton flux radiolarian assemblage seasonal variation polynya primary productivity Science Q General. Including nature conservation geographical distribution QH1-199.5 Haifeng Zhang Rujian Wang Zhengbing Han Yongming Sun Gaojing Fan Jun Zhao Ji Hu Jian Ren Jianming Pan Seasonal variations of siliceous microplankton fluxes and radiolarian assemblages linked to environmental conditions in Prydz Bay polynya, Eastern Antarctica |
topic_facet |
Prydz Bay siliceous microplankton flux radiolarian assemblage seasonal variation polynya primary productivity Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Siliceous microplankton is an effective proxy for connecting modern and past marine environments; however, radiolarians have been understudied in Prydz Bay, Eastern Antarctica. This study investigated the changes in the siliceous microbiota fluxes and radiolarian assemblages captured in a 1-year time-series sediment trap (February 2014 to February 2015, ~490 m water depth) in the polynya of Prydz Bay. The results exhibited the strong seasonality in the radiolarian assemblages and the fluxes of radiolarians, diatoms, silicoflagellates and sponge spicules, with low numbers in winter and high numbers in summer. Seasonal variations in the sea ice and plankton community were critical in these patterns. The total radiolarian flux (TRF) displayed three peaks with higher flux than the annual average TRF over the year, all of which occurred in summer. These TRF peaks were mainly driven by seasonal fluctuations of sea ice, primary productivity, grazing pressure caused by phytophagous zooplankton and resuspension of small radiolarians in the surface sediments induced by modified Circumpolar Deep Water (mCDW) intrusion onto the shelf. There were also two notable low-TRF stages, mainly related to full sea-ice coverage and high grazing pressure. Two dominant assemblages were recognized by means of Q-factor analysis. Dominant assemblage one was composed of three small-sized taxa, Antarctissa sp., Phormacantha hystrix and Plectacantha oikiskos, which could be used as a proxy for primary productivity in the Marginal Ice Zone (MIZ) in Prydz Bay. Dominant assemblage two was composed of Antarctissa strelkovi and Antarctissa denticulata, with A. strelkovi dominating. The high flux and high relative abundance of A. strelkovi marked the extension of Ice Shelf Water (ISW) to the shelf area in Prydz Bay. These findings will provide new insights and reliable proxies for modern and paleoceanographic research in the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Haifeng Zhang Rujian Wang Zhengbing Han Yongming Sun Gaojing Fan Jun Zhao Ji Hu Jian Ren Jianming Pan |
author_facet |
Haifeng Zhang Rujian Wang Zhengbing Han Yongming Sun Gaojing Fan Jun Zhao Ji Hu Jian Ren Jianming Pan |
author_sort |
Haifeng Zhang |
title |
Seasonal variations of siliceous microplankton fluxes and radiolarian assemblages linked to environmental conditions in Prydz Bay polynya, Eastern Antarctica |
title_short |
Seasonal variations of siliceous microplankton fluxes and radiolarian assemblages linked to environmental conditions in Prydz Bay polynya, Eastern Antarctica |
title_full |
Seasonal variations of siliceous microplankton fluxes and radiolarian assemblages linked to environmental conditions in Prydz Bay polynya, Eastern Antarctica |
title_fullStr |
Seasonal variations of siliceous microplankton fluxes and radiolarian assemblages linked to environmental conditions in Prydz Bay polynya, Eastern Antarctica |
title_full_unstemmed |
Seasonal variations of siliceous microplankton fluxes and radiolarian assemblages linked to environmental conditions in Prydz Bay polynya, Eastern Antarctica |
title_sort |
seasonal variations of siliceous microplankton fluxes and radiolarian assemblages linked to environmental conditions in prydz bay polynya, eastern antarctica |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1135900 https://doaj.org/article/6da32f77ea3d4f66bba2aa2183b1e833 |
geographic |
Prydz Bay Southern Ocean |
geographic_facet |
Prydz Bay Southern Ocean |
genre |
Antarc* Antarctica Ice Shelf Prydz Bay Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctica Ice Shelf Prydz Bay Sea ice Southern Ocean |
op_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1135900/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1135900 https://doaj.org/article/6da32f77ea3d4f66bba2aa2183b1e833 |
op_doi |
https://doi.org/10.3389/fmars.2023.1135900 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
_version_ |
1768385691508539392 |