Data from: Molecular underpinnings and biogeochemical consequences of enhanced diatom growth in a warming Southern Ocean
AbstractThe Southern Ocean (SO) harbours some of the most intense phytoplankton blooms on Earth. Changes in temperature and iron availability are expected to alter the intensity of SO phytoplankton blooms, but little is known about how environmental change will influence community composition and do...
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dataone:sha256:2724cc48341d8c0214048d655d22d0a1629fc165adc512659a98cbc234ae892c 2024-06-03T18:46:58+00:00 Data from: Molecular underpinnings and biogeochemical consequences of enhanced diatom growth in a warming Southern Ocean Jabre, Loay Allen, Andrew E. McCain, J. Scott P. McCrow, John P. Tenenbaum, Nancy Spackeen, Jenna L. Sipler, Rachel E. Green, Beverley R. Bronk, Deborah A. Hutchins, David A. Bertrand, Erin M. 2021-05-19T00:00:00Z https://search.dataone.org/view/sha256:2724cc48341d8c0214048d655d22d0a1629fc165adc512659a98cbc234ae892c unknown Other Dataset 2021 dataone:urn:node:BOREALIS 2024-06-03T18:17:48Z AbstractThe Southern Ocean (SO) harbours some of the most intense phytoplankton blooms on Earth. Changes in temperature and iron availability are expected to alter the intensity of SO phytoplankton blooms, but little is known about how environmental change will influence community composition and downstream biogeochemical processes. We performed experimental manipulations on surface ocean microbial communities from McMurdo Sound in the Ross Sea, with and without iron addition, at -0.5 °C, 3 °C, and 6 °C. We then examined nutrient uptake patterns as well as the growth and molecular responses of two dominant diatoms, Fragilariopsis and Pseudo-nitzschia, to these conditions. We found that nitrate uptake and primary productivity were elevated at increased temperature in the absence of iron addition, and were even greater at high temperature with added iron. Pseudo-nitzschia became more abundant under increased temperature without added iron, while Fragilariopsis required additional iron to benefit from warming. We attribute the apparent advantage Pseudo-nitzschia shows under warming to upregulation of iron-conserving photosynthetic processes, utilization of iron-economic nitrogen assimilation mechanisms, and increased iron uptake and storage. These data identify important molecular and physiological differences between dominant diatom groups and add to the growing evidence for the increasingly important role of Pseudo-nitzschia in warming SO ecosystems. This study also suggests that temperature-driven shifts in SO phytoplankton assemblages may increase utilization of the vast pool of excess nutrients in iron-limited SO surface waters, and thereby influence global nutrient distributions and carbon cycle. Dataset McMurdo Sound Ross Sea Southern Ocean Unknown McMurdo Sound Ross Sea Southern Ocean |
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dataone:urn:node:BOREALIS |
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Other Jabre, Loay Allen, Andrew E. McCain, J. Scott P. McCrow, John P. Tenenbaum, Nancy Spackeen, Jenna L. Sipler, Rachel E. Green, Beverley R. Bronk, Deborah A. Hutchins, David A. Bertrand, Erin M. Data from: Molecular underpinnings and biogeochemical consequences of enhanced diatom growth in a warming Southern Ocean |
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description |
AbstractThe Southern Ocean (SO) harbours some of the most intense phytoplankton blooms on Earth. Changes in temperature and iron availability are expected to alter the intensity of SO phytoplankton blooms, but little is known about how environmental change will influence community composition and downstream biogeochemical processes. We performed experimental manipulations on surface ocean microbial communities from McMurdo Sound in the Ross Sea, with and without iron addition, at -0.5 °C, 3 °C, and 6 °C. We then examined nutrient uptake patterns as well as the growth and molecular responses of two dominant diatoms, Fragilariopsis and Pseudo-nitzschia, to these conditions. We found that nitrate uptake and primary productivity were elevated at increased temperature in the absence of iron addition, and were even greater at high temperature with added iron. Pseudo-nitzschia became more abundant under increased temperature without added iron, while Fragilariopsis required additional iron to benefit from warming. We attribute the apparent advantage Pseudo-nitzschia shows under warming to upregulation of iron-conserving photosynthetic processes, utilization of iron-economic nitrogen assimilation mechanisms, and increased iron uptake and storage. These data identify important molecular and physiological differences between dominant diatom groups and add to the growing evidence for the increasingly important role of Pseudo-nitzschia in warming SO ecosystems. This study also suggests that temperature-driven shifts in SO phytoplankton assemblages may increase utilization of the vast pool of excess nutrients in iron-limited SO surface waters, and thereby influence global nutrient distributions and carbon cycle. |
format |
Dataset |
author |
Jabre, Loay Allen, Andrew E. McCain, J. Scott P. McCrow, John P. Tenenbaum, Nancy Spackeen, Jenna L. Sipler, Rachel E. Green, Beverley R. Bronk, Deborah A. Hutchins, David A. Bertrand, Erin M. |
author_facet |
Jabre, Loay Allen, Andrew E. McCain, J. Scott P. McCrow, John P. Tenenbaum, Nancy Spackeen, Jenna L. Sipler, Rachel E. Green, Beverley R. Bronk, Deborah A. Hutchins, David A. Bertrand, Erin M. |
author_sort |
Jabre, Loay |
title |
Data from: Molecular underpinnings and biogeochemical consequences of enhanced diatom growth in a warming Southern Ocean |
title_short |
Data from: Molecular underpinnings and biogeochemical consequences of enhanced diatom growth in a warming Southern Ocean |
title_full |
Data from: Molecular underpinnings and biogeochemical consequences of enhanced diatom growth in a warming Southern Ocean |
title_fullStr |
Data from: Molecular underpinnings and biogeochemical consequences of enhanced diatom growth in a warming Southern Ocean |
title_full_unstemmed |
Data from: Molecular underpinnings and biogeochemical consequences of enhanced diatom growth in a warming Southern Ocean |
title_sort |
data from: molecular underpinnings and biogeochemical consequences of enhanced diatom growth in a warming southern ocean |
publishDate |
2021 |
url |
https://search.dataone.org/view/sha256:2724cc48341d8c0214048d655d22d0a1629fc165adc512659a98cbc234ae892c |
geographic |
McMurdo Sound Ross Sea Southern Ocean |
geographic_facet |
McMurdo Sound Ross Sea Southern Ocean |
genre |
McMurdo Sound Ross Sea Southern Ocean |
genre_facet |
McMurdo Sound Ross Sea Southern Ocean |
_version_ |
1800873916120432640 |