Removal of snow cover inhibits spring growth of Arctic ice algae through physiological and behavioral effects
The snow cover of Arctic sea ice has recently decreased, and climate models forecast that this will continue and even increase in future. We therefore tested the effect of snow cover on the optical properties of sea ice and the biomass, photobiology, and species composition of sea ice algae at Kange...
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ftuniaarhuspubl:oai:pure.atira.dk:publications/38c6d8c3-dd82-45fc-b29d-d1129c67838f 2023-05-15T14:24:47+02:00 Removal of snow cover inhibits spring growth of Arctic ice algae through physiological and behavioral effects Lund-Hansen, Lars Chresten Hawes, Ian Sorrell, Brian Keith Holtegaard Nielsen, Morten 2014 https://pure.au.dk/portal/da/publications/removal-of-snow-cover-inhibits-spring-growth-of-arctic-ice-algae-through-physiological-and-behavioral-effects(38c6d8c3-dd82-45fc-b29d-d1129c67838f).html https://doi.org/10.1007/s00300-013-1444-z eng eng info:eu-repo/semantics/restrictedAccess Lund-Hansen , L C , Hawes , I , Sorrell , B K & Holtegaard Nielsen , M 2014 , ' Removal of snow cover inhibits spring growth of Arctic ice algae through physiological and behavioral effects ' , Polar Biology , vol. 37 , pp. 471–481 . https://doi.org/10.1007/s00300-013-1444-z ice algae photobiology Imaging PAM fluorometry Greenland Optics Snow Cover article 2014 ftuniaarhuspubl https://doi.org/10.1007/s00300-013-1444-z 2020-12-30T23:44:35Z The snow cover of Arctic sea ice has recently decreased, and climate models forecast that this will continue and even increase in future. We therefore tested the effect of snow cover on the optical properties of sea ice and the biomass, photobiology, and species composition of sea ice algae at Kangerlussuaq, West Greenland, during March 2011, using a snow-clearance experiment. Sea ice algae in areas cleared of snow was compared with control areas, using imaging variable fluorescence of photosystem II in intact, unthawed ice sections. The study coincided with the onset of spring growth of ice algae, mainly an increase in two pennate diatoms (Achnanthes taeniata and Navicula directa), as temperature increased and ice thickness and brine volume stabilized. The increase in biomass was accompanied by an increase in minimum variable fluorescence (F o) and the maximum quantum yield of PSII (F v /F m) and filling of brine channels with fluorescing cells. In contrast, in the minus snow area, PAR transmittance increased sixfold and there was an exponential decrease in chl-a and no increase in F o, and the area of fluorescing biomass declined to become undetectable. This study suggests that the onset of the spring bloom is predominantly due to temperature effects on brine channel volume, and that the algal decline after snow removal was primarily due to emigration rather than photodamage. Article in Journal/Newspaper Arctic Arctic Greenland ice algae Kangerlussuaq Polar Biology Sea ice Aarhus University: Research Arctic Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) Polar Biology 37 4 471 481 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
ice algae photobiology Imaging PAM fluorometry Greenland Optics Snow Cover |
spellingShingle |
ice algae photobiology Imaging PAM fluorometry Greenland Optics Snow Cover Lund-Hansen, Lars Chresten Hawes, Ian Sorrell, Brian Keith Holtegaard Nielsen, Morten Removal of snow cover inhibits spring growth of Arctic ice algae through physiological and behavioral effects |
topic_facet |
ice algae photobiology Imaging PAM fluorometry Greenland Optics Snow Cover |
description |
The snow cover of Arctic sea ice has recently decreased, and climate models forecast that this will continue and even increase in future. We therefore tested the effect of snow cover on the optical properties of sea ice and the biomass, photobiology, and species composition of sea ice algae at Kangerlussuaq, West Greenland, during March 2011, using a snow-clearance experiment. Sea ice algae in areas cleared of snow was compared with control areas, using imaging variable fluorescence of photosystem II in intact, unthawed ice sections. The study coincided with the onset of spring growth of ice algae, mainly an increase in two pennate diatoms (Achnanthes taeniata and Navicula directa), as temperature increased and ice thickness and brine volume stabilized. The increase in biomass was accompanied by an increase in minimum variable fluorescence (F o) and the maximum quantum yield of PSII (F v /F m) and filling of brine channels with fluorescing cells. In contrast, in the minus snow area, PAR transmittance increased sixfold and there was an exponential decrease in chl-a and no increase in F o, and the area of fluorescing biomass declined to become undetectable. This study suggests that the onset of the spring bloom is predominantly due to temperature effects on brine channel volume, and that the algal decline after snow removal was primarily due to emigration rather than photodamage. |
format |
Article in Journal/Newspaper |
author |
Lund-Hansen, Lars Chresten Hawes, Ian Sorrell, Brian Keith Holtegaard Nielsen, Morten |
author_facet |
Lund-Hansen, Lars Chresten Hawes, Ian Sorrell, Brian Keith Holtegaard Nielsen, Morten |
author_sort |
Lund-Hansen, Lars Chresten |
title |
Removal of snow cover inhibits spring growth of Arctic ice algae through physiological and behavioral effects |
title_short |
Removal of snow cover inhibits spring growth of Arctic ice algae through physiological and behavioral effects |
title_full |
Removal of snow cover inhibits spring growth of Arctic ice algae through physiological and behavioral effects |
title_fullStr |
Removal of snow cover inhibits spring growth of Arctic ice algae through physiological and behavioral effects |
title_full_unstemmed |
Removal of snow cover inhibits spring growth of Arctic ice algae through physiological and behavioral effects |
title_sort |
removal of snow cover inhibits spring growth of arctic ice algae through physiological and behavioral effects |
publishDate |
2014 |
url |
https://pure.au.dk/portal/da/publications/removal-of-snow-cover-inhibits-spring-growth-of-arctic-ice-algae-through-physiological-and-behavioral-effects(38c6d8c3-dd82-45fc-b29d-d1129c67838f).html https://doi.org/10.1007/s00300-013-1444-z |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Arctic Greenland Kangerlussuaq |
geographic_facet |
Arctic Greenland Kangerlussuaq |
genre |
Arctic Arctic Greenland ice algae Kangerlussuaq Polar Biology Sea ice |
genre_facet |
Arctic Arctic Greenland ice algae Kangerlussuaq Polar Biology Sea ice |
op_source |
Lund-Hansen , L C , Hawes , I , Sorrell , B K & Holtegaard Nielsen , M 2014 , ' Removal of snow cover inhibits spring growth of Arctic ice algae through physiological and behavioral effects ' , Polar Biology , vol. 37 , pp. 471–481 . https://doi.org/10.1007/s00300-013-1444-z |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00300-013-1444-z |
container_title |
Polar Biology |
container_volume |
37 |
container_issue |
4 |
container_start_page |
471 |
op_container_end_page |
481 |
_version_ |
1766297240338432000 |