Diatom colonization and community development in Antarctic marine waters – a short-term experiment
Main aim of the study was to search for possible differences in diatom colonization and their communities under the influence of glacier meltwater inflow and when unaffected by glacier meltwater, and also to define the time needed for the development of diatom communities on newly submerged substrat...
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Polish Academy of Sciences
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ftdoajarticles:oai:doaj.org/article:e422320d15e7441cba1e8a09f89ce412 2023-05-15T13:38:55+02:00 Diatom colonization and community development in Antarctic marine waters – a short-term experiment Zidarova Ralitsa Ivanov Plamen Dzhembekova Nina 2020-06-01T00:00:00Z https://doi.org/10.24425/ppr.2020.132572 https://doaj.org/article/e422320d15e7441cba1e8a09f89ce412 EN eng Polish Academy of Sciences http://journals.pan.pl/dlibra/publication/133012/edition/116221/content https://doaj.org/toc/2081-8262 doi:10.24425/ppr.2020.132572 2081-8262 https://doaj.org/article/e422320d15e7441cba1e8a09f89ce412 Polish Polar Research, Vol 41, Iss 2, Pp 187-212 (2020) antarctica diatoms colonization artificial substrates marine benthos Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.24425/ppr.2020.132572 2023-01-08T01:24:53Z Main aim of the study was to search for possible differences in diatom colonization and their communities under the influence of glacier meltwater inflow and when unaffected by glacier meltwater, and also to define the time needed for the development of diatom communities on newly submerged substrates at small depths in Antarctica. We used artificial substrates (Plexiglass© tiles), submerged at a depth of 1 m below the sea surface at two locations at the South Bay of Livingston Island: (1) Johnsons Dock – a cove, known to receive glacier meltwater with sediments, and (2) outside the cove, generally unaffected by glacial meltwater. Samples from the natural epilithon at similar depth were also taken as a reference for diatom community structure. Statistical testing the differences between the two sites was not possible this time, but the samples allowed us to compare the sites in terms of diatom growth, species richness, diversity and evenness changes in diatom communities along the time of the experiment at both sites and with the natural epilithon at similar depths. Diatom colonization followed the three-phases scheme (colonization, logarithmic growth and equilibrium) as in other latitudes. Based on the valve density and community indices e.g. species richness, diversity (1-D) and evenness (J’), we consider that at least three weeks might be necessary to obtain sufficiently representative for the environment diatom communities on new substrates at small depths in Antarctica, in conditions similar to those of South Bay. No particular differences between the sites were noted in the colonization scheme, but the diversity (1-D) and evenness (J’) were higher at glacier influenced site, as well as the number of the valves on the substrates. Sea ice diatoms prevailed at the glacier influenced site. We suggest that species exchange between the sea ice and other hard substrates do exist, at least for some taxa, and such species might be indicative for variations in both salinity and water transparency, related to glacial ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Livingston Island Polar Research Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Johnsons ENVELOPE(-60.350,-60.350,-62.665,-62.665) Johnsons Dock ENVELOPE(-60.368,-60.368,-62.660,-62.660) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) South Bay ENVELOPE(-63.579,-63.579,-64.870,-64.870) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
antarctica diatoms colonization artificial substrates marine benthos Geology QE1-996.5 |
spellingShingle |
antarctica diatoms colonization artificial substrates marine benthos Geology QE1-996.5 Zidarova Ralitsa Ivanov Plamen Dzhembekova Nina Diatom colonization and community development in Antarctic marine waters – a short-term experiment |
topic_facet |
antarctica diatoms colonization artificial substrates marine benthos Geology QE1-996.5 |
description |
Main aim of the study was to search for possible differences in diatom colonization and their communities under the influence of glacier meltwater inflow and when unaffected by glacier meltwater, and also to define the time needed for the development of diatom communities on newly submerged substrates at small depths in Antarctica. We used artificial substrates (Plexiglass© tiles), submerged at a depth of 1 m below the sea surface at two locations at the South Bay of Livingston Island: (1) Johnsons Dock – a cove, known to receive glacier meltwater with sediments, and (2) outside the cove, generally unaffected by glacial meltwater. Samples from the natural epilithon at similar depth were also taken as a reference for diatom community structure. Statistical testing the differences between the two sites was not possible this time, but the samples allowed us to compare the sites in terms of diatom growth, species richness, diversity and evenness changes in diatom communities along the time of the experiment at both sites and with the natural epilithon at similar depths. Diatom colonization followed the three-phases scheme (colonization, logarithmic growth and equilibrium) as in other latitudes. Based on the valve density and community indices e.g. species richness, diversity (1-D) and evenness (J’), we consider that at least three weeks might be necessary to obtain sufficiently representative for the environment diatom communities on new substrates at small depths in Antarctica, in conditions similar to those of South Bay. No particular differences between the sites were noted in the colonization scheme, but the diversity (1-D) and evenness (J’) were higher at glacier influenced site, as well as the number of the valves on the substrates. Sea ice diatoms prevailed at the glacier influenced site. We suggest that species exchange between the sea ice and other hard substrates do exist, at least for some taxa, and such species might be indicative for variations in both salinity and water transparency, related to glacial ... |
format |
Article in Journal/Newspaper |
author |
Zidarova Ralitsa Ivanov Plamen Dzhembekova Nina |
author_facet |
Zidarova Ralitsa Ivanov Plamen Dzhembekova Nina |
author_sort |
Zidarova Ralitsa |
title |
Diatom colonization and community development in Antarctic marine waters – a short-term experiment |
title_short |
Diatom colonization and community development in Antarctic marine waters – a short-term experiment |
title_full |
Diatom colonization and community development in Antarctic marine waters – a short-term experiment |
title_fullStr |
Diatom colonization and community development in Antarctic marine waters – a short-term experiment |
title_full_unstemmed |
Diatom colonization and community development in Antarctic marine waters – a short-term experiment |
title_sort |
diatom colonization and community development in antarctic marine waters – a short-term experiment |
publisher |
Polish Academy of Sciences |
publishDate |
2020 |
url |
https://doi.org/10.24425/ppr.2020.132572 https://doaj.org/article/e422320d15e7441cba1e8a09f89ce412 |
long_lat |
ENVELOPE(-60.350,-60.350,-62.665,-62.665) ENVELOPE(-60.368,-60.368,-62.660,-62.660) ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(-63.579,-63.579,-64.870,-64.870) |
geographic |
Antarctic Johnsons Johnsons Dock Livingston Island South Bay |
geographic_facet |
Antarctic Johnsons Johnsons Dock Livingston Island South Bay |
genre |
Antarc* Antarctic Antarctica Livingston Island Polar Research Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Livingston Island Polar Research Sea ice |
op_source |
Polish Polar Research, Vol 41, Iss 2, Pp 187-212 (2020) |
op_relation |
http://journals.pan.pl/dlibra/publication/133012/edition/116221/content https://doaj.org/toc/2081-8262 doi:10.24425/ppr.2020.132572 2081-8262 https://doaj.org/article/e422320d15e7441cba1e8a09f89ce412 |
op_doi |
https://doi.org/10.24425/ppr.2020.132572 |
_version_ |
1766112358043746304 |