Photobiological Effects on Ice Algae of a Rapid Whole-Fjord Loss of Snow Cover during Spring Growth in Kangerlussuaq, a West Greenland Fjord
The presence of snow on sea-ice can have dramatic effects on the photosynthetically available radiation (PAR) that reaches the ice algae. To better quantify this effect in the high Arctic, an experiment was conducted in Kangerlussuaq, west Greenland, throughout March 2013 where snow was cleared off...
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Format: | Other/Unknown Material |
Language: | English |
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PANGAEA
2023
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Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.963203 https://doi.org/10.1594/PANGAEA.963203 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.963203 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Arctic Biodiversity & Livelihoods FACE-IT Greenland ice algae Kangerlussuaq_2013 optics photobiology Snow cover Spectral radiometer SPRA stress |
spellingShingle |
Arctic Biodiversity & Livelihoods FACE-IT Greenland ice algae Kangerlussuaq_2013 optics photobiology Snow cover Spectral radiometer SPRA stress Sorrell, Brian K Hawes, Ian Stratmann, Tanja Lund-Hansen, Lars Chresten Photobiological Effects on Ice Algae of a Rapid Whole-Fjord Loss of Snow Cover during Spring Growth in Kangerlussuaq, a West Greenland Fjord |
topic_facet |
Arctic Biodiversity & Livelihoods FACE-IT Greenland ice algae Kangerlussuaq_2013 optics photobiology Snow cover Spectral radiometer SPRA stress |
description |
The presence of snow on sea-ice can have dramatic effects on the photosynthetically available radiation (PAR) that reaches the ice algae. To better quantify this effect in the high Arctic, an experiment was conducted in Kangerlussuaq, west Greenland, throughout March 2013 where snow was cleared off the sea-ice and measured parameters were compared to a control area. Samples of under-ice algae were then taken to analyse the species composition. The bottom 30 mm of the sampled ice cores were used to determine the stress on the photosystems of the sea ice algae as they experienced the rapid irradiance via the variable fluorescence of photosystem II (PSII). PSII was measured using pulse amplitude modulated (PAM) fluorometry (Walz Imaging-PAM fluorometer). This provides the effective quantum yield of PSII (Φ_PSII), which is a unitless ratio of ambient (F) and maximum (F_m) fluorescence yields. These measurements were taken every 3 hours over the final day of the study. Periodically over the week of the study, similar measurements were taken (in triplicate) with a Phyto-PAM System II Emitter-Detector (Phyto-ED) to determine how F and F_m values changed at a courser temporal resolution. Also measured were rapid light curves (RLCs), which allowed for the derivation of the relative electron transfer rate (rETR and rETR_max; µmol é/m²/s), the slope of the light-limited portion of the RLC (α; mol é /mol photons), and the irradiance at which rETR was light-saturated (E_k; µmol photon/m²/s). 100 ml samples of thawed sea-ice were also collected and stored in the dark to be used for species identification. This was done by first enumerating the ice algae to the Utermöhl method. A Zeiss Axiovert 135M (40×) inverted microscope was used to identify and count species/morphological groups via a total of four diagonals per sample. Relative abundances of algae were estimated as percent of total count, and the biomass was calculated according to the ALGESYS protocol. Throughout the experiment the following variables were collected at ... |
format |
Other/Unknown Material |
author |
Sorrell, Brian K Hawes, Ian Stratmann, Tanja Lund-Hansen, Lars Chresten |
author_facet |
Sorrell, Brian K Hawes, Ian Stratmann, Tanja Lund-Hansen, Lars Chresten |
author_sort |
Sorrell, Brian K |
title |
Photobiological Effects on Ice Algae of a Rapid Whole-Fjord Loss of Snow Cover during Spring Growth in Kangerlussuaq, a West Greenland Fjord |
title_short |
Photobiological Effects on Ice Algae of a Rapid Whole-Fjord Loss of Snow Cover during Spring Growth in Kangerlussuaq, a West Greenland Fjord |
title_full |
Photobiological Effects on Ice Algae of a Rapid Whole-Fjord Loss of Snow Cover during Spring Growth in Kangerlussuaq, a West Greenland Fjord |
title_fullStr |
Photobiological Effects on Ice Algae of a Rapid Whole-Fjord Loss of Snow Cover during Spring Growth in Kangerlussuaq, a West Greenland Fjord |
title_full_unstemmed |
Photobiological Effects on Ice Algae of a Rapid Whole-Fjord Loss of Snow Cover during Spring Growth in Kangerlussuaq, a West Greenland Fjord |
title_sort |
photobiological effects on ice algae of a rapid whole-fjord loss of snow cover during spring growth in kangerlussuaq, a west greenland fjord |
publisher |
PANGAEA |
publishDate |
2023 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.963203 https://doi.org/10.1594/PANGAEA.963203 |
op_coverage |
LATITUDE: 66.899400 * LONGITUDE: -51.084200 * DATE/TIME START: 2013-03-09T10:21:20 * DATE/TIME END: 2013-03-19T17:35:00 |
long_lat |
ENVELOPE(-51.084200,-51.084200,66.899400,66.899400) |
genre |
Arctic biodiversity Greenland ice algae Kangerlussuaq Sea ice |
genre_facet |
Arctic biodiversity Greenland ice algae Kangerlussuaq Sea ice |
op_relation |
Lund-Hansen, Lars Chresten; Bjerg-Nielsen, Michael; Stratmann, Tanja; Hawes, Ian; Sorrell, Brian K (2021): Upwelling Irradiance below Sea Ice-PAR Intensities and Spectral Distributions. Journal of Marine Science and Engineering, 9(8), 830, https://doi.org/10.3390/jmse9080830 Lund-Hansen, Lars Chresten; Bjerg-Nielsen, Michael; Stratmann, Tanja; Hawes, Ian; Sorrell, Brian K (2023): Photosynthetically available radiation (PAR) from Kangerlussuaq, Greenland [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.962926 Lund-Hansen, Lars Chresten; Bjerg-Nielsen, Michael; Stratmann, Tanja; Hawes, Ian; Sorrell, Brian K (2023): Spectral distributions of visible light wavelengths (~320-950 nm) from Kangerlussuaq, Greenland [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.962928 Sorrell, Brian K; Hawes, Ian; Stratmann, Tanja; Lund-Hansen, Lars Chresten (2021): Photobiological Effects on Ice Algae of a Rapid Whole-Fjord Loss of Snow Cover during Spring Growth in Kangerlussuaq, a West Greenland Fjord. Journal of Marine Science and Engineering, 9(8), 814, https://doi.org/10.3390/jmse9080814 https://doi.pangaea.de/10.1594/PANGAEA.963203 https://doi.org/10.1594/PANGAEA.963203 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.96320310.3390/jmse908083010.1594/PANGAEA.96292610.1594/PANGAEA.96292810.3390/jmse9080814 |
_version_ |
1810294360204378112 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.963203 2024-09-15T17:52:18+00:00 Photobiological Effects on Ice Algae of a Rapid Whole-Fjord Loss of Snow Cover during Spring Growth in Kangerlussuaq, a West Greenland Fjord Sorrell, Brian K Hawes, Ian Stratmann, Tanja Lund-Hansen, Lars Chresten LATITUDE: 66.899400 * LONGITUDE: -51.084200 * DATE/TIME START: 2013-03-09T10:21:20 * DATE/TIME END: 2013-03-19T17:35:00 2023 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.963203 https://doi.org/10.1594/PANGAEA.963203 en eng PANGAEA Lund-Hansen, Lars Chresten; Bjerg-Nielsen, Michael; Stratmann, Tanja; Hawes, Ian; Sorrell, Brian K (2021): Upwelling Irradiance below Sea Ice-PAR Intensities and Spectral Distributions. Journal of Marine Science and Engineering, 9(8), 830, https://doi.org/10.3390/jmse9080830 Lund-Hansen, Lars Chresten; Bjerg-Nielsen, Michael; Stratmann, Tanja; Hawes, Ian; Sorrell, Brian K (2023): Photosynthetically available radiation (PAR) from Kangerlussuaq, Greenland [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.962926 Lund-Hansen, Lars Chresten; Bjerg-Nielsen, Michael; Stratmann, Tanja; Hawes, Ian; Sorrell, Brian K (2023): Spectral distributions of visible light wavelengths (~320-950 nm) from Kangerlussuaq, Greenland [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.962928 Sorrell, Brian K; Hawes, Ian; Stratmann, Tanja; Lund-Hansen, Lars Chresten (2021): Photobiological Effects on Ice Algae of a Rapid Whole-Fjord Loss of Snow Cover during Spring Growth in Kangerlussuaq, a West Greenland Fjord. Journal of Marine Science and Engineering, 9(8), 814, https://doi.org/10.3390/jmse9080814 https://doi.pangaea.de/10.1594/PANGAEA.963203 https://doi.org/10.1594/PANGAEA.963203 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Arctic Biodiversity & Livelihoods FACE-IT Greenland ice algae Kangerlussuaq_2013 optics photobiology Snow cover Spectral radiometer SPRA stress dataset bundled publication 2023 ftpangaea https://doi.org/10.1594/PANGAEA.96320310.3390/jmse908083010.1594/PANGAEA.96292610.1594/PANGAEA.96292810.3390/jmse9080814 2024-07-24T02:31:21Z The presence of snow on sea-ice can have dramatic effects on the photosynthetically available radiation (PAR) that reaches the ice algae. To better quantify this effect in the high Arctic, an experiment was conducted in Kangerlussuaq, west Greenland, throughout March 2013 where snow was cleared off the sea-ice and measured parameters were compared to a control area. Samples of under-ice algae were then taken to analyse the species composition. The bottom 30 mm of the sampled ice cores were used to determine the stress on the photosystems of the sea ice algae as they experienced the rapid irradiance via the variable fluorescence of photosystem II (PSII). PSII was measured using pulse amplitude modulated (PAM) fluorometry (Walz Imaging-PAM fluorometer). This provides the effective quantum yield of PSII (Φ_PSII), which is a unitless ratio of ambient (F) and maximum (F_m) fluorescence yields. These measurements were taken every 3 hours over the final day of the study. Periodically over the week of the study, similar measurements were taken (in triplicate) with a Phyto-PAM System II Emitter-Detector (Phyto-ED) to determine how F and F_m values changed at a courser temporal resolution. Also measured were rapid light curves (RLCs), which allowed for the derivation of the relative electron transfer rate (rETR and rETR_max; µmol é/m²/s), the slope of the light-limited portion of the RLC (α; mol é /mol photons), and the irradiance at which rETR was light-saturated (E_k; µmol photon/m²/s). 100 ml samples of thawed sea-ice were also collected and stored in the dark to be used for species identification. This was done by first enumerating the ice algae to the Utermöhl method. A Zeiss Axiovert 135M (40×) inverted microscope was used to identify and count species/morphological groups via a total of four diagonals per sample. Relative abundances of algae were estimated as percent of total count, and the biomass was calculated according to the ALGESYS protocol. Throughout the experiment the following variables were collected at ... Other/Unknown Material Arctic biodiversity Greenland ice algae Kangerlussuaq Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-51.084200,-51.084200,66.899400,66.899400) |