A comparative study of iron and temperature interactive effects on diatoms and Phaeocystis antarctica from the Ross Sea, Antarctica
In the future, temperature and iron availability are predicted to change in the coastal polynyas of Antarctica, which are the most biologically productive regions of the Southern Ocean. We examined the individual and combined effects of iron addition (+500 nM) and temperature increase (4°C) on Phaeo...
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ftwilliammarycol:oai:scholarworks.wm.edu:vimsarticles-3234 2023-06-11T04:07:01+02:00 A comparative study of iron and temperature interactive effects on diatoms and Phaeocystis antarctica from the Ross Sea, Antarctica Zhu, Zhi Xu, Kai Fu, Feixue Spackeen, Jenna L. Bronk, Deborah A. Hutchins, David A. 2016-01-01T08:00:00Z application/pdf https://scholarworks.wm.edu/vimsarticles/2238 https://doi.org/10.3354/meps11732 https://scholarworks.wm.edu/context/vimsarticles/article/3234/viewcontent/m550p039.pdf https://scholarworks.wm.edu/context/vimsarticles/article/3234/filename/0/type/additional/viewcontent/m550p039_supp.pdf unknown W&M ScholarWorks https://scholarworks.wm.edu/vimsarticles/2238 doi: doi:10.3354/meps11732 https://scholarworks.wm.edu/context/vimsarticles/article/3234/viewcontent/m550p039.pdf https://scholarworks.wm.edu/context/vimsarticles/article/3234/filename/0/type/additional/viewcontent/m550p039_supp.pdf VIMS Articles Antarctic · Global warming · Fe input · Phytoplankton community · Diatom · Phaeocystis · Pseudo-nitzschia Biological Sciences Peer-Reviewed Articles Oceanography text 2016 ftwilliammarycol https://doi.org/10.3354/meps11732</p>10.3354/meps11732 2023-05-04T17:49:32Z In the future, temperature and iron availability are predicted to change in the coastal polynyas of Antarctica, which are the most biologically productive regions of the Southern Ocean. We examined the individual and combined effects of iron addition (+500 nM) and temperature increase (4°C) on Phaeocystis antarctica and several dominant diatom species isolated from the McMurdo Sound sector of the Ross Sea. Iron addition increased growth, carbon fixation, iron uptake rates, cellular carbon quota, and cell size of almost all tested species, while temperature increase only affected certain species. Concurrent increases in temperature and iron synergistically stimulated the growth rates of some species, particularly Pseudo-nitzschia subcurvata. The diversified responses of these phytoplankton to iron and temperature may help explain the current spatial and temporal distributions of diatoms and prymnesiophytes in the Ross Sea. In the future, potential temperature and iron increases may promote the growth of the diatoms Chaetoceros sp., Fragilariopsis cylindrus, and especially P. subcurvata. In contrast, growth rates of P. antarctica did not increase at higher temperatures, suggesting that a shift in community composition toward diatoms may occur under warmer conditions in this biologically and biogeochemically important Southern Ocean polynya region. Text Antarc* Antarctic Antarctica McMurdo Sound Ross Sea Southern Ocean W&M ScholarWorks Antarctic McMurdo Sound Ross Sea Southern Ocean |
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Open Polar |
collection |
W&M ScholarWorks |
op_collection_id |
ftwilliammarycol |
language |
unknown |
topic |
Antarctic · Global warming · Fe input · Phytoplankton community · Diatom · Phaeocystis · Pseudo-nitzschia Biological Sciences Peer-Reviewed Articles Oceanography |
spellingShingle |
Antarctic · Global warming · Fe input · Phytoplankton community · Diatom · Phaeocystis · Pseudo-nitzschia Biological Sciences Peer-Reviewed Articles Oceanography Zhu, Zhi Xu, Kai Fu, Feixue Spackeen, Jenna L. Bronk, Deborah A. Hutchins, David A. A comparative study of iron and temperature interactive effects on diatoms and Phaeocystis antarctica from the Ross Sea, Antarctica |
topic_facet |
Antarctic · Global warming · Fe input · Phytoplankton community · Diatom · Phaeocystis · Pseudo-nitzschia Biological Sciences Peer-Reviewed Articles Oceanography |
description |
In the future, temperature and iron availability are predicted to change in the coastal polynyas of Antarctica, which are the most biologically productive regions of the Southern Ocean. We examined the individual and combined effects of iron addition (+500 nM) and temperature increase (4°C) on Phaeocystis antarctica and several dominant diatom species isolated from the McMurdo Sound sector of the Ross Sea. Iron addition increased growth, carbon fixation, iron uptake rates, cellular carbon quota, and cell size of almost all tested species, while temperature increase only affected certain species. Concurrent increases in temperature and iron synergistically stimulated the growth rates of some species, particularly Pseudo-nitzschia subcurvata. The diversified responses of these phytoplankton to iron and temperature may help explain the current spatial and temporal distributions of diatoms and prymnesiophytes in the Ross Sea. In the future, potential temperature and iron increases may promote the growth of the diatoms Chaetoceros sp., Fragilariopsis cylindrus, and especially P. subcurvata. In contrast, growth rates of P. antarctica did not increase at higher temperatures, suggesting that a shift in community composition toward diatoms may occur under warmer conditions in this biologically and biogeochemically important Southern Ocean polynya region. |
format |
Text |
author |
Zhu, Zhi Xu, Kai Fu, Feixue Spackeen, Jenna L. Bronk, Deborah A. Hutchins, David A. |
author_facet |
Zhu, Zhi Xu, Kai Fu, Feixue Spackeen, Jenna L. Bronk, Deborah A. Hutchins, David A. |
author_sort |
Zhu, Zhi |
title |
A comparative study of iron and temperature interactive effects on diatoms and Phaeocystis antarctica from the Ross Sea, Antarctica |
title_short |
A comparative study of iron and temperature interactive effects on diatoms and Phaeocystis antarctica from the Ross Sea, Antarctica |
title_full |
A comparative study of iron and temperature interactive effects on diatoms and Phaeocystis antarctica from the Ross Sea, Antarctica |
title_fullStr |
A comparative study of iron and temperature interactive effects on diatoms and Phaeocystis antarctica from the Ross Sea, Antarctica |
title_full_unstemmed |
A comparative study of iron and temperature interactive effects on diatoms and Phaeocystis antarctica from the Ross Sea, Antarctica |
title_sort |
comparative study of iron and temperature interactive effects on diatoms and phaeocystis antarctica from the ross sea, antarctica |
publisher |
W&M ScholarWorks |
publishDate |
2016 |
url |
https://scholarworks.wm.edu/vimsarticles/2238 https://doi.org/10.3354/meps11732 https://scholarworks.wm.edu/context/vimsarticles/article/3234/viewcontent/m550p039.pdf https://scholarworks.wm.edu/context/vimsarticles/article/3234/filename/0/type/additional/viewcontent/m550p039_supp.pdf |
geographic |
Antarctic McMurdo Sound Ross Sea Southern Ocean |
geographic_facet |
Antarctic McMurdo Sound Ross Sea Southern Ocean |
genre |
Antarc* Antarctic Antarctica McMurdo Sound Ross Sea Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Sound Ross Sea Southern Ocean |
op_source |
VIMS Articles |
op_relation |
https://scholarworks.wm.edu/vimsarticles/2238 doi: doi:10.3354/meps11732 https://scholarworks.wm.edu/context/vimsarticles/article/3234/viewcontent/m550p039.pdf https://scholarworks.wm.edu/context/vimsarticles/article/3234/filename/0/type/additional/viewcontent/m550p039_supp.pdf |
op_doi |
https://doi.org/10.3354/meps11732</p>10.3354/meps11732 |
_version_ |
1768379441706172416 |