Iron and light limitation of phytoplankton growth off East Antarctica
Phytoplankton production controls the transfer of carbon dioxide from the atmosphere into the ocean through the biological carbon pump, facilitating the sequestration of carbon dioxide and thus, contributing to the regulation of global climate. In the Southern Ocean, a high-nutrient low-chlorophyll...
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ftunivtasecite:oai:ecite.utas.edu.au:150500 2023-05-15T13:42:40+02:00 Iron and light limitation of phytoplankton growth off East Antarctica Vives, CR Schallenberg, C Strutton, PG Westwood, KJ 2022 https://doi.org/10.1016/j.jmarsys.2022.103774 http://ecite.utas.edu.au/150500 en eng Elsevier Science Bv http://dx.doi.org/10.1016/j.jmarsys.2022.103774 http://purl.org/au-research/grants/arc/CE170100023 Vives, CR and Schallenberg, C and Strutton, PG and Westwood, KJ, Iron and light limitation of phytoplankton growth off East Antarctica, Journal of Marine Systems, 234 Article 103774. ISSN 0924-7963 (2022) [Refereed Article] http://ecite.utas.edu.au/150500 Earth Sciences Oceanography Biological oceanography Refereed Article PeerReviewed 2022 ftunivtasecite https://doi.org/10.1016/j.jmarsys.2022.103774 2022-11-07T23:17:17Z Phytoplankton production controls the transfer of carbon dioxide from the atmosphere into the ocean through the biological carbon pump, facilitating the sequestration of carbon dioxide and thus, contributing to the regulation of global climate. In the Southern Ocean, a high-nutrient low-chlorophyll region, productivity is limited by micronutrients including iron. The limiting role of light is also important, especially in the context of Southern Ocean phytoplankton adaptation to the low-iron conditions. To investigate the relative dominance of iron and light limitation on phytoplankton growth, we conducted a series of incubation experiments during a 2019 summer research voyage off East Antarctica. Our results show that, while light was the primary limiting factor of phytoplankton growth, iron addition became favourable for growth under high light conditions. This supports similar findings from laboratory (Strzepek et al., 2019) and field experiments in the Ross Sea (Alderkamp et al., 2019) and provides a new insight from a different region of the Southern Ocean, at a later stage of the austral summer. Similar results have previously been documented in larger diatoms, and here we provide evidence that it is also true for smaller cells. Our findings add to the body of knowledge regarding iron and light limitation in the Southern Ocean, in a poorly sampled area, leading to a better understanding of how primary production will change in a future warming ocean. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal East Antarctica Ross Sea Southern Ocean eCite UTAS (University of Tasmania) Austral East Antarctica Ross Sea Southern Ocean Journal of Marine Systems 234 103774 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Biological oceanography |
spellingShingle |
Earth Sciences Oceanography Biological oceanography Vives, CR Schallenberg, C Strutton, PG Westwood, KJ Iron and light limitation of phytoplankton growth off East Antarctica |
topic_facet |
Earth Sciences Oceanography Biological oceanography |
description |
Phytoplankton production controls the transfer of carbon dioxide from the atmosphere into the ocean through the biological carbon pump, facilitating the sequestration of carbon dioxide and thus, contributing to the regulation of global climate. In the Southern Ocean, a high-nutrient low-chlorophyll region, productivity is limited by micronutrients including iron. The limiting role of light is also important, especially in the context of Southern Ocean phytoplankton adaptation to the low-iron conditions. To investigate the relative dominance of iron and light limitation on phytoplankton growth, we conducted a series of incubation experiments during a 2019 summer research voyage off East Antarctica. Our results show that, while light was the primary limiting factor of phytoplankton growth, iron addition became favourable for growth under high light conditions. This supports similar findings from laboratory (Strzepek et al., 2019) and field experiments in the Ross Sea (Alderkamp et al., 2019) and provides a new insight from a different region of the Southern Ocean, at a later stage of the austral summer. Similar results have previously been documented in larger diatoms, and here we provide evidence that it is also true for smaller cells. Our findings add to the body of knowledge regarding iron and light limitation in the Southern Ocean, in a poorly sampled area, leading to a better understanding of how primary production will change in a future warming ocean. |
format |
Article in Journal/Newspaper |
author |
Vives, CR Schallenberg, C Strutton, PG Westwood, KJ |
author_facet |
Vives, CR Schallenberg, C Strutton, PG Westwood, KJ |
author_sort |
Vives, CR |
title |
Iron and light limitation of phytoplankton growth off East Antarctica |
title_short |
Iron and light limitation of phytoplankton growth off East Antarctica |
title_full |
Iron and light limitation of phytoplankton growth off East Antarctica |
title_fullStr |
Iron and light limitation of phytoplankton growth off East Antarctica |
title_full_unstemmed |
Iron and light limitation of phytoplankton growth off East Antarctica |
title_sort |
iron and light limitation of phytoplankton growth off east antarctica |
publisher |
Elsevier Science Bv |
publishDate |
2022 |
url |
https://doi.org/10.1016/j.jmarsys.2022.103774 http://ecite.utas.edu.au/150500 |
geographic |
Austral East Antarctica Ross Sea Southern Ocean |
geographic_facet |
Austral East Antarctica Ross Sea Southern Ocean |
genre |
Antarc* Antarctica Antarctica Journal East Antarctica Ross Sea Southern Ocean |
genre_facet |
Antarc* Antarctica Antarctica Journal East Antarctica Ross Sea Southern Ocean |
op_relation |
http://dx.doi.org/10.1016/j.jmarsys.2022.103774 http://purl.org/au-research/grants/arc/CE170100023 Vives, CR and Schallenberg, C and Strutton, PG and Westwood, KJ, Iron and light limitation of phytoplankton growth off East Antarctica, Journal of Marine Systems, 234 Article 103774. ISSN 0924-7963 (2022) [Refereed Article] http://ecite.utas.edu.au/150500 |
op_doi |
https://doi.org/10.1016/j.jmarsys.2022.103774 |
container_title |
Journal of Marine Systems |
container_volume |
234 |
container_start_page |
103774 |
_version_ |
1766171503283404800 |