Viral lysis and microzooplankton grazing of phytoplankton throughout the Southern Ocean
We investigated microzooplankton grazing and viral lysis of the pico‐ and nanophytoplankton community in the Southern Ocean during the “Sensitivity of Sub‐Antarctic Zone Waters to Global Change” cruise to the Australian sector (January–February 2007) and the Antarctic–XXIV/3 (February–March 2008) ex...
Published in: | Limnology and Oceanography |
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crwiley:10.4319/lo.2012.57.6.1826 2024-09-15T17:48:06+00:00 Viral lysis and microzooplankton grazing of phytoplankton throughout the Southern Ocean Evans, Claire Brussaard, Corina P. D. 2012 http://dx.doi.org/10.4319/lo.2012.57.6.1826 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2012.57.6.1826 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2012.57.6.1826 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 57, issue 6, page 1826-1837 ISSN 0024-3590 1939-5590 journal-article 2012 crwiley https://doi.org/10.4319/lo.2012.57.6.1826 2024-08-09T04:26:59Z We investigated microzooplankton grazing and viral lysis of the pico‐ and nanophytoplankton community in the Southern Ocean during the “Sensitivity of Sub‐Antarctic Zone Waters to Global Change” cruise to the Australian sector (January–February 2007) and the Antarctic–XXIV/3 (February–March 2008) expedition to the Greenwich Meridian and the Drake Passage. A dilution assay was employed in concert with flow cytometry at stations that spanned the sub‐Antarctic, Polar Frontal, and Antarctic Zones and in the Weddell Gyre. Both viral lysis and microzooplankton grazing played a significant role in controlling cyanobacterial populations, except in the sub‐Antarctic west of Tasmania, where their growth was regulated by grazing alone. Three main groups of eukaryotic algae were detected, and these were calculated to have average cell diameters of 0.8, 2.1, and 3.7 µm. Grazing was significant in the control of their growth at all locations, whereas viral lysis of eukaryotic algae was comparatively minor, as it was detected in only 40% of the experiments. Throughout the surveyed sites no pattern between geographical location and growth rates and/or mortality rates could be established for any of the phytoplankton groups. Estimates of iron regeneration indicated that as a result of its widespread occurrence, microzooplankton grazing is a more consistent source of regenerated iron to the Southern Ocean but that viral lysis can be responsible for significant pulses of iron into the dissolved pool. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Southern Ocean Wiley Online Library Limnology and Oceanography 57 6 1826 1837 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
We investigated microzooplankton grazing and viral lysis of the pico‐ and nanophytoplankton community in the Southern Ocean during the “Sensitivity of Sub‐Antarctic Zone Waters to Global Change” cruise to the Australian sector (January–February 2007) and the Antarctic–XXIV/3 (February–March 2008) expedition to the Greenwich Meridian and the Drake Passage. A dilution assay was employed in concert with flow cytometry at stations that spanned the sub‐Antarctic, Polar Frontal, and Antarctic Zones and in the Weddell Gyre. Both viral lysis and microzooplankton grazing played a significant role in controlling cyanobacterial populations, except in the sub‐Antarctic west of Tasmania, where their growth was regulated by grazing alone. Three main groups of eukaryotic algae were detected, and these were calculated to have average cell diameters of 0.8, 2.1, and 3.7 µm. Grazing was significant in the control of their growth at all locations, whereas viral lysis of eukaryotic algae was comparatively minor, as it was detected in only 40% of the experiments. Throughout the surveyed sites no pattern between geographical location and growth rates and/or mortality rates could be established for any of the phytoplankton groups. Estimates of iron regeneration indicated that as a result of its widespread occurrence, microzooplankton grazing is a more consistent source of regenerated iron to the Southern Ocean but that viral lysis can be responsible for significant pulses of iron into the dissolved pool. |
format |
Article in Journal/Newspaper |
author |
Evans, Claire Brussaard, Corina P. D. |
spellingShingle |
Evans, Claire Brussaard, Corina P. D. Viral lysis and microzooplankton grazing of phytoplankton throughout the Southern Ocean |
author_facet |
Evans, Claire Brussaard, Corina P. D. |
author_sort |
Evans, Claire |
title |
Viral lysis and microzooplankton grazing of phytoplankton throughout the Southern Ocean |
title_short |
Viral lysis and microzooplankton grazing of phytoplankton throughout the Southern Ocean |
title_full |
Viral lysis and microzooplankton grazing of phytoplankton throughout the Southern Ocean |
title_fullStr |
Viral lysis and microzooplankton grazing of phytoplankton throughout the Southern Ocean |
title_full_unstemmed |
Viral lysis and microzooplankton grazing of phytoplankton throughout the Southern Ocean |
title_sort |
viral lysis and microzooplankton grazing of phytoplankton throughout the southern ocean |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.4319/lo.2012.57.6.1826 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2012.57.6.1826 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2012.57.6.1826 |
genre |
Antarc* Antarctic Drake Passage Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Southern Ocean |
op_source |
Limnology and Oceanography volume 57, issue 6, page 1826-1837 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2012.57.6.1826 |
container_title |
Limnology and Oceanography |
container_volume |
57 |
container_issue |
6 |
container_start_page |
1826 |
op_container_end_page |
1837 |
_version_ |
1810289138853740544 |