Southern Ocean phytoplankton stimulated by wildfire emissions and sustained by iron recycling
Large ash plumes emitted by the 2019–2020 Australian wildfires were associated with a widespread phytoplankton bloom in the iron-limited Pacific sector of the Southern Ocean. In this study, we used satellite observations and aerosol reanalysis products to study the regional phytoplankton community r...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Amer Geophysical Union
2022
|
Subjects: | |
Online Access: | https://eprints.utas.edu.au/46567/ https://eprints.utas.edu.au/46567/1/150790%20-%20Southern%20Ocean%20phytoplankton%20stimulated%20by%20wildfire%20emissions.pdf |
id |
ftunivtasmania:oai:eprints.utas.edu.au:46567 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasmania:oai:eprints.utas.edu.au:46567 2023-05-15T18:24:31+02:00 Southern Ocean phytoplankton stimulated by wildfire emissions and sustained by iron recycling Weis, J Schallenberg, C Chase, Z Bowie, AR Wojtasiewicz, B Perron, MMG Mallet, MD Strutton, PG 2022 application/pdf https://eprints.utas.edu.au/46567/ https://eprints.utas.edu.au/46567/1/150790%20-%20Southern%20Ocean%20phytoplankton%20stimulated%20by%20wildfire%20emissions.pdf en eng Amer Geophysical Union https://eprints.utas.edu.au/46567/1/150790%20-%20Southern%20Ocean%20phytoplankton%20stimulated%20by%20wildfire%20emissions.pdf Weis, J, Schallenberg, C orcid:0000-0002-3073-7500 , Chase, Z orcid:0000-0001-5060-779X , Bowie, AR orcid:0000-0002-5144-7799 , Wojtasiewicz, B, Perron, MMG orcid:0000-0001-5424-7138 , Mallet, MD orcid:0000-0003-2749-8833 and Strutton, PG orcid:0000-0002-2395-9471 2022 , 'Southern Ocean phytoplankton stimulated by wildfire emissions and sustained by iron recycling' , Geophysical Research Letters, vol. 49, no. 11 , pp. 1-11 , doi:10.1029/2021GL097538 <http://dx.doi.org/10.1029/2021GL097538>. Southern Ocean phytoplankton wildfire emissions iron recycling Article PeerReviewed 2022 ftunivtasmania https://doi.org/10.1029/2021GL097538 2022-07-25T22:16:41Z Large ash plumes emitted by the 2019–2020 Australian wildfires were associated with a widespread phytoplankton bloom in the iron-limited Pacific sector of the Southern Ocean. In this study, we used satellite observations and aerosol reanalysis products to study the regional phytoplankton community response to wildfire emissions. The bloom was stimulated by pyrogenic iron fertilization and coincided with elevated cellular pigment concentrations, increased photochemical efficiency, and apparent community structural shifts. Physiological anomalies were consistent with previously observed phytoplankton responses to iron stress relief and persisted for up to 9 months. Supported by a regional iron budget, we conclude that the bloom was sustained by iron recycling and episodic inputs of pyrogenic and dust-borne mineral iron. The continuous regeneration of iron was likely facilitated by the bloom's large size, mitigating edge dilution effects, as well as enhanced bioavailability of pyrogenic and mineral iron due to atmospheric and chemical processing during long-range transport. Article in Journal/Newspaper Southern Ocean University of Tasmania: UTas ePrints Pacific Southern Ocean Geophysical Research Letters 49 11 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Southern Ocean phytoplankton wildfire emissions iron recycling |
spellingShingle |
Southern Ocean phytoplankton wildfire emissions iron recycling Weis, J Schallenberg, C Chase, Z Bowie, AR Wojtasiewicz, B Perron, MMG Mallet, MD Strutton, PG Southern Ocean phytoplankton stimulated by wildfire emissions and sustained by iron recycling |
topic_facet |
Southern Ocean phytoplankton wildfire emissions iron recycling |
description |
Large ash plumes emitted by the 2019–2020 Australian wildfires were associated with a widespread phytoplankton bloom in the iron-limited Pacific sector of the Southern Ocean. In this study, we used satellite observations and aerosol reanalysis products to study the regional phytoplankton community response to wildfire emissions. The bloom was stimulated by pyrogenic iron fertilization and coincided with elevated cellular pigment concentrations, increased photochemical efficiency, and apparent community structural shifts. Physiological anomalies were consistent with previously observed phytoplankton responses to iron stress relief and persisted for up to 9 months. Supported by a regional iron budget, we conclude that the bloom was sustained by iron recycling and episodic inputs of pyrogenic and dust-borne mineral iron. The continuous regeneration of iron was likely facilitated by the bloom's large size, mitigating edge dilution effects, as well as enhanced bioavailability of pyrogenic and mineral iron due to atmospheric and chemical processing during long-range transport. |
format |
Article in Journal/Newspaper |
author |
Weis, J Schallenberg, C Chase, Z Bowie, AR Wojtasiewicz, B Perron, MMG Mallet, MD Strutton, PG |
author_facet |
Weis, J Schallenberg, C Chase, Z Bowie, AR Wojtasiewicz, B Perron, MMG Mallet, MD Strutton, PG |
author_sort |
Weis, J |
title |
Southern Ocean phytoplankton stimulated by wildfire emissions and sustained by iron recycling |
title_short |
Southern Ocean phytoplankton stimulated by wildfire emissions and sustained by iron recycling |
title_full |
Southern Ocean phytoplankton stimulated by wildfire emissions and sustained by iron recycling |
title_fullStr |
Southern Ocean phytoplankton stimulated by wildfire emissions and sustained by iron recycling |
title_full_unstemmed |
Southern Ocean phytoplankton stimulated by wildfire emissions and sustained by iron recycling |
title_sort |
southern ocean phytoplankton stimulated by wildfire emissions and sustained by iron recycling |
publisher |
Amer Geophysical Union |
publishDate |
2022 |
url |
https://eprints.utas.edu.au/46567/ https://eprints.utas.edu.au/46567/1/150790%20-%20Southern%20Ocean%20phytoplankton%20stimulated%20by%20wildfire%20emissions.pdf |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://eprints.utas.edu.au/46567/1/150790%20-%20Southern%20Ocean%20phytoplankton%20stimulated%20by%20wildfire%20emissions.pdf Weis, J, Schallenberg, C orcid:0000-0002-3073-7500 , Chase, Z orcid:0000-0001-5060-779X , Bowie, AR orcid:0000-0002-5144-7799 , Wojtasiewicz, B, Perron, MMG orcid:0000-0001-5424-7138 , Mallet, MD orcid:0000-0003-2749-8833 and Strutton, PG orcid:0000-0002-2395-9471 2022 , 'Southern Ocean phytoplankton stimulated by wildfire emissions and sustained by iron recycling' , Geophysical Research Letters, vol. 49, no. 11 , pp. 1-11 , doi:10.1029/2021GL097538 <http://dx.doi.org/10.1029/2021GL097538>. |
op_doi |
https://doi.org/10.1029/2021GL097538 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
11 |
_version_ |
1766205129533423616 |