Seasonal similarity in rates of protistan herbivory in fjords along the Western Antarctic Peninsula
Abstract We quantified phytoplankton growth and protistan grazing rates during late austral autumn 2013 and late austral spring 2014, in several glacio‐marine fjords and connecting channels along the Western Antarctic Peninsula (WAP). During austral autumn, low and declining chlorophyll a (Chl a ) c...
Published in: | Limnology and Oceanography |
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Online Access: | http://dx.doi.org/10.1002/lno.11014 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11014 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11014 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11014 https://aslopubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/lno.11014 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11014 |
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crwiley:10.1002/lno.11014 2024-03-24T08:57:35+00:00 Seasonal similarity in rates of protistan herbivory in fjords along the Western Antarctic Peninsula Morison, F. Menden‐Deuer, S. National Science Foundation EPSCoR 2018 http://dx.doi.org/10.1002/lno.11014 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11014 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11014 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11014 https://aslopubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/lno.11014 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11014 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 63, issue 6, page 2858-2876 ISSN 0024-3590 1939-5590 Aquatic Science Oceanography journal-article 2018 crwiley https://doi.org/10.1002/lno.11014 2024-02-28T02:06:45Z Abstract We quantified phytoplankton growth and protistan grazing rates during late austral autumn 2013 and late austral spring 2014, in several glacio‐marine fjords and connecting channels along the Western Antarctic Peninsula (WAP). During austral autumn, low and declining chlorophyll a (Chl a ) concentrations (≤ 0.4 μ g L −1 ) were almost entirely composed of pico/nanophytoplankton, whereas during austral spring, high but patchy Chl a concentrations in the fjords (up to 18.5 μ g L −1 ) reflected a diatom bloom. These contrasting dynamics were associated with high seasonal differences in irradiance, but not temperature, and were consistent with the balance resulting from lower phytoplankton growth rates in autumn (−0.01 d −1 to 0.19 d −1 ) than in spring (0.06–0.93 d −1 ) but similar magnitudes of herbivorous grazing in both seasons. Grazing was either absent or low (0.11–0.26 d −1 ) and restricted to the picophytoplankton and nanophytoplankton. In the productive fjords lining the WAP, a fraction of primary production was channelled through a persistent and across‐seasons equally active microbial food web, while during spring an increasing fraction of organic carbon shifted from trophic transfer and recycling to an export pathway. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Wiley Online Library Antarctic Antarctic Peninsula Austral Limnology and Oceanography 63 6 2858 2876 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Oceanography |
spellingShingle |
Aquatic Science Oceanography Morison, F. Menden‐Deuer, S. Seasonal similarity in rates of protistan herbivory in fjords along the Western Antarctic Peninsula |
topic_facet |
Aquatic Science Oceanography |
description |
Abstract We quantified phytoplankton growth and protistan grazing rates during late austral autumn 2013 and late austral spring 2014, in several glacio‐marine fjords and connecting channels along the Western Antarctic Peninsula (WAP). During austral autumn, low and declining chlorophyll a (Chl a ) concentrations (≤ 0.4 μ g L −1 ) were almost entirely composed of pico/nanophytoplankton, whereas during austral spring, high but patchy Chl a concentrations in the fjords (up to 18.5 μ g L −1 ) reflected a diatom bloom. These contrasting dynamics were associated with high seasonal differences in irradiance, but not temperature, and were consistent with the balance resulting from lower phytoplankton growth rates in autumn (−0.01 d −1 to 0.19 d −1 ) than in spring (0.06–0.93 d −1 ) but similar magnitudes of herbivorous grazing in both seasons. Grazing was either absent or low (0.11–0.26 d −1 ) and restricted to the picophytoplankton and nanophytoplankton. In the productive fjords lining the WAP, a fraction of primary production was channelled through a persistent and across‐seasons equally active microbial food web, while during spring an increasing fraction of organic carbon shifted from trophic transfer and recycling to an export pathway. |
author2 |
National Science Foundation EPSCoR |
format |
Article in Journal/Newspaper |
author |
Morison, F. Menden‐Deuer, S. |
author_facet |
Morison, F. Menden‐Deuer, S. |
author_sort |
Morison, F. |
title |
Seasonal similarity in rates of protistan herbivory in fjords along the Western Antarctic Peninsula |
title_short |
Seasonal similarity in rates of protistan herbivory in fjords along the Western Antarctic Peninsula |
title_full |
Seasonal similarity in rates of protistan herbivory in fjords along the Western Antarctic Peninsula |
title_fullStr |
Seasonal similarity in rates of protistan herbivory in fjords along the Western Antarctic Peninsula |
title_full_unstemmed |
Seasonal similarity in rates of protistan herbivory in fjords along the Western Antarctic Peninsula |
title_sort |
seasonal similarity in rates of protistan herbivory in fjords along the western antarctic peninsula |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/lno.11014 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11014 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11014 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11014 https://aslopubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/lno.11014 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11014 |
geographic |
Antarctic Antarctic Peninsula Austral |
geographic_facet |
Antarctic Antarctic Peninsula Austral |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_source |
Limnology and Oceanography volume 63, issue 6, page 2858-2876 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/lno.11014 |
container_title |
Limnology and Oceanography |
container_volume |
63 |
container_issue |
6 |
container_start_page |
2858 |
op_container_end_page |
2876 |
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1794407926147842048 |