Phytoplankton responses to shifting iron and temperature conditions in the Irminger Basin
The High Latitude North Atlantic is a globally significant region of deepwater formation home to intense primary productivity. Controls on phytoplankton growth in this region remain poorly constrained but are thought to seasonally be dominated by iron availability, with the potential to be influence...
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2023
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ftdalhouse:oai:DalSpace.library.dal.ca:10222/82866 2023-10-01T03:57:52+02:00 Phytoplankton responses to shifting iron and temperature conditions in the Irminger Basin Beckley, Lena Department of Biology Master of Science n/a Erin Bertrand Julie LaRoche Rob Middag Not Applicable 2023-08-29T18:04:26Z http://hdl.handle.net/10222/82866 en eng http://hdl.handle.net/10222/82866 iron temperature High Latitude North Atlantic Phytoplankton metaproteomics 2023 ftdalhouse 2023-09-02T23:11:50Z The High Latitude North Atlantic is a globally significant region of deepwater formation home to intense primary productivity. Controls on phytoplankton growth in this region remain poorly constrained but are thought to seasonally be dominated by iron availability, with the potential to be influenced by predicted increases in sea surface temperatures. We conducted iron-temperature experiments in the Irminger Basin in late summer of 2021 to examine the impact of iron addition, with and without changes in temperature, on phytoplankton. We found clear evidence of iron limitation and that iron and temperature interactively impacted phytoplankton growth. Bacillariophyta responded to iron addition, and metaproteomic analyses revealed diverging strategies between Bacillariophyta and Prymnesiophyceae to iron-limiting conditions. Bacillariophyta deployed photosynthesis-related protein responses to manage iron stress regardless of changes in temperature. These interactive iron-temperature effects on phytoplankton growth have implications for the future of bloom progression and the biogeochemistry in this key marine region. Other/Unknown Material North Atlantic Dalhousie University: DalSpace Institutional Repository Irminger Basin ENVELOPE(-36.000,-36.000,61.000,61.000) |
institution |
Open Polar |
collection |
Dalhousie University: DalSpace Institutional Repository |
op_collection_id |
ftdalhouse |
language |
English |
topic |
iron temperature High Latitude North Atlantic Phytoplankton metaproteomics |
spellingShingle |
iron temperature High Latitude North Atlantic Phytoplankton metaproteomics Beckley, Lena Phytoplankton responses to shifting iron and temperature conditions in the Irminger Basin |
topic_facet |
iron temperature High Latitude North Atlantic Phytoplankton metaproteomics |
description |
The High Latitude North Atlantic is a globally significant region of deepwater formation home to intense primary productivity. Controls on phytoplankton growth in this region remain poorly constrained but are thought to seasonally be dominated by iron availability, with the potential to be influenced by predicted increases in sea surface temperatures. We conducted iron-temperature experiments in the Irminger Basin in late summer of 2021 to examine the impact of iron addition, with and without changes in temperature, on phytoplankton. We found clear evidence of iron limitation and that iron and temperature interactively impacted phytoplankton growth. Bacillariophyta responded to iron addition, and metaproteomic analyses revealed diverging strategies between Bacillariophyta and Prymnesiophyceae to iron-limiting conditions. Bacillariophyta deployed photosynthesis-related protein responses to manage iron stress regardless of changes in temperature. These interactive iron-temperature effects on phytoplankton growth have implications for the future of bloom progression and the biogeochemistry in this key marine region. |
author2 |
Department of Biology Master of Science n/a Erin Bertrand Julie LaRoche Rob Middag Not Applicable |
author |
Beckley, Lena |
author_facet |
Beckley, Lena |
author_sort |
Beckley, Lena |
title |
Phytoplankton responses to shifting iron and temperature conditions in the Irminger Basin |
title_short |
Phytoplankton responses to shifting iron and temperature conditions in the Irminger Basin |
title_full |
Phytoplankton responses to shifting iron and temperature conditions in the Irminger Basin |
title_fullStr |
Phytoplankton responses to shifting iron and temperature conditions in the Irminger Basin |
title_full_unstemmed |
Phytoplankton responses to shifting iron and temperature conditions in the Irminger Basin |
title_sort |
phytoplankton responses to shifting iron and temperature conditions in the irminger basin |
publishDate |
2023 |
url |
http://hdl.handle.net/10222/82866 |
long_lat |
ENVELOPE(-36.000,-36.000,61.000,61.000) |
geographic |
Irminger Basin |
geographic_facet |
Irminger Basin |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://hdl.handle.net/10222/82866 |
_version_ |
1778530009629065216 |