Low diversity of a key phytoplankton group along the West Antarctic Peninsula
The West Antarctic Peninsula (henceforth “Peninsula”) is experiencing rapid warming and melting that is impacting the regional marine food web. The primary phytoplankton groups along the Peninsula are diatoms and cryptophytes. Relative to diatoms, there has been little focus on regional cryptophytes...
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2021
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ftcarolinadr:cdr.lib.unc.edu:r207tz70g 2023-06-11T04:06:34+02:00 Low diversity of a key phytoplankton group along the West Antarctic Peninsula Brown, M.S. Bowman, J.S. Lin, Y. Feehan, C.J. Moreno, C.M. Cassar, N. Marchetti, A. Schofield, O.M. College of Arts and Sciences, Department of Marine Sciences 2021 https://doi.org/10.17615/qpce-av89 https://cdr.lib.unc.edu/downloads/j3860h75k?file=thumbnail https://cdr.lib.unc.edu/downloads/j3860h75k English eng John Wiley and Sons Inc https://doi.org/10.17615/qpce-av89 https://cdr.lib.unc.edu/downloads/j3860h75k?file=thumbnail https://cdr.lib.unc.edu/downloads/j3860h75k http://rightsstatements.org/vocab/InC/1.0/ Limnology and Oceanography, 66(6) Geminigera Antarctica Cryptophyta Bacillariophyta Antarctic Peninsula West Antarctica Article 2021 ftcarolinadr https://doi.org/10.17615/qpce-av89 2023-05-28T21:02:27Z The West Antarctic Peninsula (henceforth “Peninsula”) is experiencing rapid warming and melting that is impacting the regional marine food web. The primary phytoplankton groups along the Peninsula are diatoms and cryptophytes. Relative to diatoms, there has been little focus on regional cryptophytes, and thus our understanding of their diversity and ecology is limited, especially at the species level. This gap is important, as diatoms and cryptophytes play distinct roles in the regional marine food web and biogeochemistry. Here, we use a phylogenetic placement approach with 18S rRNA gene amplicon sequence variants to assess surface ocean cryptophyte diversity and its drivers at a high taxonomic resolution along the Peninsula. Data were collected over 5 years (2012–2016) during the regional research cruises of the Palmer Long-Term Ecological Research program. Our results indicate that there are two major cryptophyte taxa along the Peninsula, consisting of distinct Geminigera spp., which in aggregate always comprise nearly 100% of the cryptophyte community (indicating low taxa evenness). The primary taxon dominates the cryptophyte community across all samples/years, which span a broad range of oceanographic conditions. A shift in cryptophyte community composition between a lower (higher) primary (secondary) taxon percentage is associated with distinct oceanographic conditions, including lower (higher) temperature, salinity, nutrients, and cryptophyte relative abundance (phytoplankton biomass and diatom relative abundance). These results emphasize the need for a full characterization of the ecology of these two taxa, as it is predicted that cryptophytes will increase along the Peninsula given projections of continued regional environmental change. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica Carolina Digital Repository (UNC - University of North Carolina) Antarctic Antarctic Peninsula West Antarctica |
institution |
Open Polar |
collection |
Carolina Digital Repository (UNC - University of North Carolina) |
op_collection_id |
ftcarolinadr |
language |
English |
topic |
Geminigera Antarctica Cryptophyta Bacillariophyta Antarctic Peninsula West Antarctica |
spellingShingle |
Geminigera Antarctica Cryptophyta Bacillariophyta Antarctic Peninsula West Antarctica Brown, M.S. Bowman, J.S. Lin, Y. Feehan, C.J. Moreno, C.M. Cassar, N. Marchetti, A. Schofield, O.M. Low diversity of a key phytoplankton group along the West Antarctic Peninsula |
topic_facet |
Geminigera Antarctica Cryptophyta Bacillariophyta Antarctic Peninsula West Antarctica |
description |
The West Antarctic Peninsula (henceforth “Peninsula”) is experiencing rapid warming and melting that is impacting the regional marine food web. The primary phytoplankton groups along the Peninsula are diatoms and cryptophytes. Relative to diatoms, there has been little focus on regional cryptophytes, and thus our understanding of their diversity and ecology is limited, especially at the species level. This gap is important, as diatoms and cryptophytes play distinct roles in the regional marine food web and biogeochemistry. Here, we use a phylogenetic placement approach with 18S rRNA gene amplicon sequence variants to assess surface ocean cryptophyte diversity and its drivers at a high taxonomic resolution along the Peninsula. Data were collected over 5 years (2012–2016) during the regional research cruises of the Palmer Long-Term Ecological Research program. Our results indicate that there are two major cryptophyte taxa along the Peninsula, consisting of distinct Geminigera spp., which in aggregate always comprise nearly 100% of the cryptophyte community (indicating low taxa evenness). The primary taxon dominates the cryptophyte community across all samples/years, which span a broad range of oceanographic conditions. A shift in cryptophyte community composition between a lower (higher) primary (secondary) taxon percentage is associated with distinct oceanographic conditions, including lower (higher) temperature, salinity, nutrients, and cryptophyte relative abundance (phytoplankton biomass and diatom relative abundance). These results emphasize the need for a full characterization of the ecology of these two taxa, as it is predicted that cryptophytes will increase along the Peninsula given projections of continued regional environmental change. |
author2 |
College of Arts and Sciences, Department of Marine Sciences |
format |
Article in Journal/Newspaper |
author |
Brown, M.S. Bowman, J.S. Lin, Y. Feehan, C.J. Moreno, C.M. Cassar, N. Marchetti, A. Schofield, O.M. |
author_facet |
Brown, M.S. Bowman, J.S. Lin, Y. Feehan, C.J. Moreno, C.M. Cassar, N. Marchetti, A. Schofield, O.M. |
author_sort |
Brown, M.S. |
title |
Low diversity of a key phytoplankton group along the West Antarctic Peninsula |
title_short |
Low diversity of a key phytoplankton group along the West Antarctic Peninsula |
title_full |
Low diversity of a key phytoplankton group along the West Antarctic Peninsula |
title_fullStr |
Low diversity of a key phytoplankton group along the West Antarctic Peninsula |
title_full_unstemmed |
Low diversity of a key phytoplankton group along the West Antarctic Peninsula |
title_sort |
low diversity of a key phytoplankton group along the west antarctic peninsula |
publisher |
John Wiley and Sons Inc |
publishDate |
2021 |
url |
https://doi.org/10.17615/qpce-av89 https://cdr.lib.unc.edu/downloads/j3860h75k?file=thumbnail https://cdr.lib.unc.edu/downloads/j3860h75k |
geographic |
Antarctic Antarctic Peninsula West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica |
op_source |
Limnology and Oceanography, 66(6) |
op_relation |
https://doi.org/10.17615/qpce-av89 https://cdr.lib.unc.edu/downloads/j3860h75k?file=thumbnail https://cdr.lib.unc.edu/downloads/j3860h75k |
op_rights |
http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.17615/qpce-av89 |
_version_ |
1768378588296380416 |