Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet
Darkening of parts of the Greenland ice sheet surface during the summer months leads to reduced albedo and increased melting. Here we show that heavily pigmented, actively photosynthesising microalgae and cyanobacteria are present on the bare ice. We demonstrate the widespread abundance of green alg...
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/38621/ https://doi.org/10.1038/ismej.2012.107 |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:38621 2023-05-15T16:26:30+02:00 Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet Yallop, Marian L. Anesio, Alexandre M. Perkins, Rupert Gordon Cook, Joseph Telling, Jon Fagan, Daniel MacFarlane, James Stibal, Marek Barker, Gary Bellas, Chris Hodson, Andy Tranter, Martyn Wadham, Jemma Roberts, Nicholas W. 2012-12 https://orca.cardiff.ac.uk/id/eprint/38621/ https://doi.org/10.1038/ismej.2012.107 unknown Nature Publishing Group Yallop, Marian L., Anesio, Alexandre M., Perkins, Rupert Gordon https://orca.cardiff.ac.uk/view/cardiffauthors/A0101677.html orcid:0000-0002-0810-2656 orcid:0000-0002-0810-2656, Cook, Joseph, Telling, Jon, Fagan, Daniel, MacFarlane, James, Stibal, Marek, Barker, Gary, Bellas, Chris, Hodson, Andy, Tranter, Martyn, Wadham, Jemma and Roberts, Nicholas W. 2012. Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet. The ISME Journal 6 (12) , pp. 2302-2313. 10.1038/ismej.2012.107 https://doi.org/10.1038/ismej.2012.107 doi:10.1038/ismej.2012.107 GC Oceanography Article PeerReviewed 2012 ftunivcardiff https://doi.org/10.1038/ismej.2012.107 2022-10-27T22:33:11Z Darkening of parts of the Greenland ice sheet surface during the summer months leads to reduced albedo and increased melting. Here we show that heavily pigmented, actively photosynthesising microalgae and cyanobacteria are present on the bare ice. We demonstrate the widespread abundance of green algae in the Zygnematophyceae on the ice sheet surface in Southwest Greenland. Photophysiological measurements (variable chlorophyll fluorescence) indicate that the ice algae likely use screening mechanisms to downregulate photosynthesis when exposed to high intensities of visible and ultraviolet radiation, rather than non-photochemical quenching or cell movement. Using imaging microspectrophotometry, we demonstrate that intact cells and filaments absorb light with characteristic spectral profiles across ultraviolet and visible wavelengths, whereas inorganic dust particles typical for these areas display little absorption. Our results indicate that the phototrophic community growing directly on the bare ice, through their photophysiology, most likely have an important role in changing albedo, and subsequently may impact melt rates on the ice sheet. Article in Journal/Newspaper Greenland ice algae Ice Sheet Cardiff University: ORCA (Online Research @ Cardiff) Greenland The ISME Journal 6 12 2302 2313 |
institution |
Open Polar |
collection |
Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
topic |
GC Oceanography |
spellingShingle |
GC Oceanography Yallop, Marian L. Anesio, Alexandre M. Perkins, Rupert Gordon Cook, Joseph Telling, Jon Fagan, Daniel MacFarlane, James Stibal, Marek Barker, Gary Bellas, Chris Hodson, Andy Tranter, Martyn Wadham, Jemma Roberts, Nicholas W. Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet |
topic_facet |
GC Oceanography |
description |
Darkening of parts of the Greenland ice sheet surface during the summer months leads to reduced albedo and increased melting. Here we show that heavily pigmented, actively photosynthesising microalgae and cyanobacteria are present on the bare ice. We demonstrate the widespread abundance of green algae in the Zygnematophyceae on the ice sheet surface in Southwest Greenland. Photophysiological measurements (variable chlorophyll fluorescence) indicate that the ice algae likely use screening mechanisms to downregulate photosynthesis when exposed to high intensities of visible and ultraviolet radiation, rather than non-photochemical quenching or cell movement. Using imaging microspectrophotometry, we demonstrate that intact cells and filaments absorb light with characteristic spectral profiles across ultraviolet and visible wavelengths, whereas inorganic dust particles typical for these areas display little absorption. Our results indicate that the phototrophic community growing directly on the bare ice, through their photophysiology, most likely have an important role in changing albedo, and subsequently may impact melt rates on the ice sheet. |
format |
Article in Journal/Newspaper |
author |
Yallop, Marian L. Anesio, Alexandre M. Perkins, Rupert Gordon Cook, Joseph Telling, Jon Fagan, Daniel MacFarlane, James Stibal, Marek Barker, Gary Bellas, Chris Hodson, Andy Tranter, Martyn Wadham, Jemma Roberts, Nicholas W. |
author_facet |
Yallop, Marian L. Anesio, Alexandre M. Perkins, Rupert Gordon Cook, Joseph Telling, Jon Fagan, Daniel MacFarlane, James Stibal, Marek Barker, Gary Bellas, Chris Hodson, Andy Tranter, Martyn Wadham, Jemma Roberts, Nicholas W. |
author_sort |
Yallop, Marian L. |
title |
Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet |
title_short |
Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet |
title_full |
Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet |
title_fullStr |
Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet |
title_full_unstemmed |
Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet |
title_sort |
photophysiology and albedo-changing potential of the ice algal community on the surface of the greenland ice sheet |
publisher |
Nature Publishing Group |
publishDate |
2012 |
url |
https://orca.cardiff.ac.uk/id/eprint/38621/ https://doi.org/10.1038/ismej.2012.107 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice algae Ice Sheet |
genre_facet |
Greenland ice algae Ice Sheet |
op_relation |
Yallop, Marian L., Anesio, Alexandre M., Perkins, Rupert Gordon https://orca.cardiff.ac.uk/view/cardiffauthors/A0101677.html orcid:0000-0002-0810-2656 orcid:0000-0002-0810-2656, Cook, Joseph, Telling, Jon, Fagan, Daniel, MacFarlane, James, Stibal, Marek, Barker, Gary, Bellas, Chris, Hodson, Andy, Tranter, Martyn, Wadham, Jemma and Roberts, Nicholas W. 2012. Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet. The ISME Journal 6 (12) , pp. 2302-2313. 10.1038/ismej.2012.107 https://doi.org/10.1038/ismej.2012.107 doi:10.1038/ismej.2012.107 |
op_doi |
https://doi.org/10.1038/ismej.2012.107 |
container_title |
The ISME Journal |
container_volume |
6 |
container_issue |
12 |
container_start_page |
2302 |
op_container_end_page |
2313 |
_version_ |
1766015421370073088 |