Pigment signatures of algal communities and their implications for glacier surface darkening
Abstract Blooms of pigmented algae darken the surface of glaciers and ice sheets, thereby enhancing solar energy absorption and amplifying ice and snow melt. The impacts of algal pigment and community composition on surface darkening are still poorly understood. Here, we characterise glacier ice and...
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Online Access: | https://doi.org/10.1038/s41598-022-22271-4 https://doaj.org/article/1070a3502cb44249a3fb1f026fd0dcbf |
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ftdoajarticles:oai:doaj.org/article:1070a3502cb44249a3fb1f026fd0dcbf 2023-05-15T16:21:14+02:00 Pigment signatures of algal communities and their implications for glacier surface darkening Laura Halbach Lou-Anne Chevrollier Eva L. Doting Joseph M. Cook Marie B. Jensen Liane G. Benning James A. Bradley Martin Hansen Lars C. Lund-Hansen Stiig Markager Brian K. Sorrell Martyn Tranter Christopher B. Trivedi Matthias Winkel Alexandre M. Anesio 2022-10-01T00:00:00Z https://doi.org/10.1038/s41598-022-22271-4 https://doaj.org/article/1070a3502cb44249a3fb1f026fd0dcbf EN eng Nature Portfolio https://doi.org/10.1038/s41598-022-22271-4 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-22271-4 2045-2322 https://doaj.org/article/1070a3502cb44249a3fb1f026fd0dcbf Scientific Reports, Vol 12, Iss 1, Pp 1-14 (2022) Medicine R Science Q article 2022 ftdoajarticles https://doi.org/10.1038/s41598-022-22271-4 2022-12-30T20:30:37Z Abstract Blooms of pigmented algae darken the surface of glaciers and ice sheets, thereby enhancing solar energy absorption and amplifying ice and snow melt. The impacts of algal pigment and community composition on surface darkening are still poorly understood. Here, we characterise glacier ice and snow algal pigment signatures on snow and bare ice surfaces and study their role in photophysiology and energy absorption on three glaciers in Southeast Greenland. Purpurogallin and astaxanthin esters dominated the glacier ice and snow algal pigment pools (mass ratios to chlorophyll a of 32 and 56, respectively). Algal biomass and pigments impacted chromophoric dissolved organic matter concentrations. Despite the effective absorption of astaxanthin esters at wavelengths where incoming irradiance peaks, the cellular energy absorption of snow algae was 95% lower than anticipated from their pigmentation, due to pigment packaging. The energy absorption of glacier ice algae was consequently ~ 5 × higher. On bare ice, snow algae may have locally contributed up to 13% to total biological radiative forcing, despite contributing 44% to total biomass. Our results give new insights into the impact of algal community composition on bare ice energy absorption and biomass accumulation during snow melt. Article in Journal/Newspaper glacier Greenland ice algae Directory of Open Access Journals: DOAJ Articles Greenland Scientific Reports 12 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Laura Halbach Lou-Anne Chevrollier Eva L. Doting Joseph M. Cook Marie B. Jensen Liane G. Benning James A. Bradley Martin Hansen Lars C. Lund-Hansen Stiig Markager Brian K. Sorrell Martyn Tranter Christopher B. Trivedi Matthias Winkel Alexandre M. Anesio Pigment signatures of algal communities and their implications for glacier surface darkening |
topic_facet |
Medicine R Science Q |
description |
Abstract Blooms of pigmented algae darken the surface of glaciers and ice sheets, thereby enhancing solar energy absorption and amplifying ice and snow melt. The impacts of algal pigment and community composition on surface darkening are still poorly understood. Here, we characterise glacier ice and snow algal pigment signatures on snow and bare ice surfaces and study their role in photophysiology and energy absorption on three glaciers in Southeast Greenland. Purpurogallin and astaxanthin esters dominated the glacier ice and snow algal pigment pools (mass ratios to chlorophyll a of 32 and 56, respectively). Algal biomass and pigments impacted chromophoric dissolved organic matter concentrations. Despite the effective absorption of astaxanthin esters at wavelengths where incoming irradiance peaks, the cellular energy absorption of snow algae was 95% lower than anticipated from their pigmentation, due to pigment packaging. The energy absorption of glacier ice algae was consequently ~ 5 × higher. On bare ice, snow algae may have locally contributed up to 13% to total biological radiative forcing, despite contributing 44% to total biomass. Our results give new insights into the impact of algal community composition on bare ice energy absorption and biomass accumulation during snow melt. |
format |
Article in Journal/Newspaper |
author |
Laura Halbach Lou-Anne Chevrollier Eva L. Doting Joseph M. Cook Marie B. Jensen Liane G. Benning James A. Bradley Martin Hansen Lars C. Lund-Hansen Stiig Markager Brian K. Sorrell Martyn Tranter Christopher B. Trivedi Matthias Winkel Alexandre M. Anesio |
author_facet |
Laura Halbach Lou-Anne Chevrollier Eva L. Doting Joseph M. Cook Marie B. Jensen Liane G. Benning James A. Bradley Martin Hansen Lars C. Lund-Hansen Stiig Markager Brian K. Sorrell Martyn Tranter Christopher B. Trivedi Matthias Winkel Alexandre M. Anesio |
author_sort |
Laura Halbach |
title |
Pigment signatures of algal communities and their implications for glacier surface darkening |
title_short |
Pigment signatures of algal communities and their implications for glacier surface darkening |
title_full |
Pigment signatures of algal communities and their implications for glacier surface darkening |
title_fullStr |
Pigment signatures of algal communities and their implications for glacier surface darkening |
title_full_unstemmed |
Pigment signatures of algal communities and their implications for glacier surface darkening |
title_sort |
pigment signatures of algal communities and their implications for glacier surface darkening |
publisher |
Nature Portfolio |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41598-022-22271-4 https://doaj.org/article/1070a3502cb44249a3fb1f026fd0dcbf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland ice algae |
genre_facet |
glacier Greenland ice algae |
op_source |
Scientific Reports, Vol 12, Iss 1, Pp 1-14 (2022) |
op_relation |
https://doi.org/10.1038/s41598-022-22271-4 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-22271-4 2045-2322 https://doaj.org/article/1070a3502cb44249a3fb1f026fd0dcbf |
op_doi |
https://doi.org/10.1038/s41598-022-22271-4 |
container_title |
Scientific Reports |
container_volume |
12 |
container_issue |
1 |
_version_ |
1766009242088636416 |