Response of Antarctic sea-ice algae to an experimental decrease in pH: a preliminary analysis from chlorophyll fluorescence imaging of melting ice
Microorganisms confined to annual sea ice in the Southern Ocean are exposed to highly variable oxygen and carbonate chemistry dynamics because of the seasonal increase in biomass and limited exchange with the underlying water column. For sea-ice algae, physiological stress is likely to be exacerbate...
Published in: | Polar Research |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Norwegian Polar Inst
2018
|
Subjects: | |
Online Access: | https://eprints.utas.edu.au/29433/ https://eprints.utas.edu.au/29433/1/130915%20-%20Response%20of%20Antarctic%20sea-ice%20algae%20to%20an%20experimental%20decrease%20in%20pH.pdf |
id |
ftunivtasmania:oai:eprints.utas.edu.au:29433 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasmania:oai:eprints.utas.edu.au:29433 2023-05-15T13:31:53+02:00 Response of Antarctic sea-ice algae to an experimental decrease in pH: a preliminary analysis from chlorophyll fluorescence imaging of melting ice Castrisios, K Martin, A Muller, MN Kennedy, FC McMinn, A Ryan, KG 2018 application/pdf https://eprints.utas.edu.au/29433/ https://eprints.utas.edu.au/29433/1/130915%20-%20Response%20of%20Antarctic%20sea-ice%20algae%20to%20an%20experimental%20decrease%20in%20pH.pdf en eng Norwegian Polar Inst https://eprints.utas.edu.au/29433/1/130915%20-%20Response%20of%20Antarctic%20sea-ice%20algae%20to%20an%20experimental%20decrease%20in%20pH.pdf Castrisios, K, Martin, A orcid:0000-0001-8260-5529 , Muller, MN, Kennedy, FC orcid:0000-0003-1796-0764 , McMinn, A orcid:0000-0002-2133-3854 and Ryan, KG 2018 , 'Response of Antarctic sea-ice algae to an experimental decrease in pH: a preliminary analysis from chlorophyll fluorescence imaging of melting ice' , Polar Research, vol. 37 , pp. 1-8 , doi:10.1080/17518369.2018.1438696 <http://dx.doi.org/10.1080/17518369.2018.1438696>. ice algae pH Antarctica imaging-PAM photophysiology carbonate chemistry Article PeerReviewed 2018 ftunivtasmania https://doi.org/10.1080/17518369.2018.1438696 2021-09-20T22:17:20Z Microorganisms confined to annual sea ice in the Southern Ocean are exposed to highly variable oxygen and carbonate chemistry dynamics because of the seasonal increase in biomass and limited exchange with the underlying water column. For sea-ice algae, physiological stress is likely to be exacerbated when the ice melts; however, variation in carbonate speciation has rarely been monitored during this important state-transition. Using pulse amplitude modulated fluorometry (Imaging-PAM, Walz), we documented in situ changes in the maximum quantum yield of photosystem II ( F v / F m ) of sea-ice algae melting out into seawater with initial pH values ranging from 7.66 to 6.39. Although the process of ice-melt elevated seawater pH by 0.2–0.55 units, we observed a decrease in F v / F m between 0.02 and 0.06 for each unit drop in pH during real-time fluorescence imaging. These results are considered preliminary but provide context for including carbonate chemistry monitoring in the design of future sea ice state-transition experiments. Imaging-PAM is a reliable technology for determining F v / F m , but is of limited use for obtaining additional photosynthetic parameters when imaging melting ice. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice algae Polar Research Sea ice Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean Polar Research 37 1 1438696 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
ice algae pH Antarctica imaging-PAM photophysiology carbonate chemistry |
spellingShingle |
ice algae pH Antarctica imaging-PAM photophysiology carbonate chemistry Castrisios, K Martin, A Muller, MN Kennedy, FC McMinn, A Ryan, KG Response of Antarctic sea-ice algae to an experimental decrease in pH: a preliminary analysis from chlorophyll fluorescence imaging of melting ice |
topic_facet |
ice algae pH Antarctica imaging-PAM photophysiology carbonate chemistry |
description |
Microorganisms confined to annual sea ice in the Southern Ocean are exposed to highly variable oxygen and carbonate chemistry dynamics because of the seasonal increase in biomass and limited exchange with the underlying water column. For sea-ice algae, physiological stress is likely to be exacerbated when the ice melts; however, variation in carbonate speciation has rarely been monitored during this important state-transition. Using pulse amplitude modulated fluorometry (Imaging-PAM, Walz), we documented in situ changes in the maximum quantum yield of photosystem II ( F v / F m ) of sea-ice algae melting out into seawater with initial pH values ranging from 7.66 to 6.39. Although the process of ice-melt elevated seawater pH by 0.2–0.55 units, we observed a decrease in F v / F m between 0.02 and 0.06 for each unit drop in pH during real-time fluorescence imaging. These results are considered preliminary but provide context for including carbonate chemistry monitoring in the design of future sea ice state-transition experiments. Imaging-PAM is a reliable technology for determining F v / F m , but is of limited use for obtaining additional photosynthetic parameters when imaging melting ice. |
format |
Article in Journal/Newspaper |
author |
Castrisios, K Martin, A Muller, MN Kennedy, FC McMinn, A Ryan, KG |
author_facet |
Castrisios, K Martin, A Muller, MN Kennedy, FC McMinn, A Ryan, KG |
author_sort |
Castrisios, K |
title |
Response of Antarctic sea-ice algae to an experimental decrease in pH: a preliminary analysis from chlorophyll fluorescence imaging of melting ice |
title_short |
Response of Antarctic sea-ice algae to an experimental decrease in pH: a preliminary analysis from chlorophyll fluorescence imaging of melting ice |
title_full |
Response of Antarctic sea-ice algae to an experimental decrease in pH: a preliminary analysis from chlorophyll fluorescence imaging of melting ice |
title_fullStr |
Response of Antarctic sea-ice algae to an experimental decrease in pH: a preliminary analysis from chlorophyll fluorescence imaging of melting ice |
title_full_unstemmed |
Response of Antarctic sea-ice algae to an experimental decrease in pH: a preliminary analysis from chlorophyll fluorescence imaging of melting ice |
title_sort |
response of antarctic sea-ice algae to an experimental decrease in ph: a preliminary analysis from chlorophyll fluorescence imaging of melting ice |
publisher |
Norwegian Polar Inst |
publishDate |
2018 |
url |
https://eprints.utas.edu.au/29433/ https://eprints.utas.edu.au/29433/1/130915%20-%20Response%20of%20Antarctic%20sea-ice%20algae%20to%20an%20experimental%20decrease%20in%20pH.pdf |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica ice algae Polar Research Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica ice algae Polar Research Sea ice Southern Ocean |
op_relation |
https://eprints.utas.edu.au/29433/1/130915%20-%20Response%20of%20Antarctic%20sea-ice%20algae%20to%20an%20experimental%20decrease%20in%20pH.pdf Castrisios, K, Martin, A orcid:0000-0001-8260-5529 , Muller, MN, Kennedy, FC orcid:0000-0003-1796-0764 , McMinn, A orcid:0000-0002-2133-3854 and Ryan, KG 2018 , 'Response of Antarctic sea-ice algae to an experimental decrease in pH: a preliminary analysis from chlorophyll fluorescence imaging of melting ice' , Polar Research, vol. 37 , pp. 1-8 , doi:10.1080/17518369.2018.1438696 <http://dx.doi.org/10.1080/17518369.2018.1438696>. |
op_doi |
https://doi.org/10.1080/17518369.2018.1438696 |
container_title |
Polar Research |
container_volume |
37 |
container_issue |
1 |
container_start_page |
1438696 |
_version_ |
1766022035320864768 |