Physicochemical sea ice and water characteristics near Point Barrow 2005-2006
Photosynthetic parameters of phytoplankton and sea ice algae from landfast sea ice of the Chukchi Sea off Point Barrow, Alaska, were assessed in spring 2005 and winter through spring 2006 using Pulse Amplitude Modulated (PAM) fluorometry including estimates of maximum quantum efficiency (Fv/Fm), max...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.815928 2024-09-15T17:50:35+00:00 Physicochemical sea ice and water characteristics near Point Barrow 2005-2006 Manes, Sarah Story Gradinger, Rolf MEDIAN LATITUDE: 71.341268 * MEDIAN LONGITUDE: -156.587604 * SOUTH-BOUND LATITUDE: 71.328326 * WEST-BOUND LONGITUDE: -156.694406 * NORTH-BOUND LATITUDE: 71.353904 * EAST-BOUND LONGITUDE: -156.471706 * DATE/TIME START: 2005-03-14T00:00:00 * DATE/TIME END: 2006-05-30T00:00:00 2009 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.815928 https://doi.org/10.1594/PANGAEA.815928 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.815928 https://doi.org/10.1594/PANGAEA.815928 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Manes, Sarah Story; Gradinger, Rolf (2009): Small scale vertical gradients of Arctic ice algal photophysiological properties. Photosynthesis Research, 102(1), 53-66, https://doi.org/10.1007/s11120-009-9489-0 International Polar Year (2007-2008) IPY dataset publication series 2009 ftpangaea https://doi.org/10.1594/PANGAEA.81592810.1007/s11120-009-9489-0 2024-07-24T02:31:21Z Photosynthetic parameters of phytoplankton and sea ice algae from landfast sea ice of the Chukchi Sea off Point Barrow, Alaska, were assessed in spring 2005 and winter through spring 2006 using Pulse Amplitude Modulated (PAM) fluorometry including estimates of maximum quantum efficiency (Fv/Fm), maximum relative electron transport rate (rETRmax), photosynthetic efficiency (alpha), and the photoadaptive index (Ek). The use of centrifuged brine samples allowed to document vertical gradients in ice algal acclimation with 5 cm vertical resolution for the first time. Bottom ice algae (0-5 cm from ice-water interface) expressed low Fv/Fm (0.331-0.426) and low alpha (0.098-0.130 /(µmol photons/m**2/s)) in December. Fv/Fm and alpha increased in March and May (0.468-0.588 and 0.141-0.438 /(µmol photons/m**2/s), respectively) indicating increased photosynthetic activity. In addition, increases in rETRmax (3.3-16.4 a.u.) and Ek (20-88 µmol photons/m**2/s) from December to May illustrates a higher potential for primary productivity as communities become better acclimated to under-ice light conditions. In conclusion, photosynthetic performance by ice algae (as assessed by PAM fluorometry) was tightly linked to sea ice salinity, temperature, and inorganic nutrient concentrations (mainly nitrogen). Other/Unknown Material Arctic Barrow Chukchi Chukchi Sea ice algae International Polar Year IPY Point Barrow Sea ice Alaska PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-156.694406,-156.471706,71.353904,71.328326) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
International Polar Year (2007-2008) IPY |
spellingShingle |
International Polar Year (2007-2008) IPY Manes, Sarah Story Gradinger, Rolf Physicochemical sea ice and water characteristics near Point Barrow 2005-2006 |
topic_facet |
International Polar Year (2007-2008) IPY |
description |
Photosynthetic parameters of phytoplankton and sea ice algae from landfast sea ice of the Chukchi Sea off Point Barrow, Alaska, were assessed in spring 2005 and winter through spring 2006 using Pulse Amplitude Modulated (PAM) fluorometry including estimates of maximum quantum efficiency (Fv/Fm), maximum relative electron transport rate (rETRmax), photosynthetic efficiency (alpha), and the photoadaptive index (Ek). The use of centrifuged brine samples allowed to document vertical gradients in ice algal acclimation with 5 cm vertical resolution for the first time. Bottom ice algae (0-5 cm from ice-water interface) expressed low Fv/Fm (0.331-0.426) and low alpha (0.098-0.130 /(µmol photons/m**2/s)) in December. Fv/Fm and alpha increased in March and May (0.468-0.588 and 0.141-0.438 /(µmol photons/m**2/s), respectively) indicating increased photosynthetic activity. In addition, increases in rETRmax (3.3-16.4 a.u.) and Ek (20-88 µmol photons/m**2/s) from December to May illustrates a higher potential for primary productivity as communities become better acclimated to under-ice light conditions. In conclusion, photosynthetic performance by ice algae (as assessed by PAM fluorometry) was tightly linked to sea ice salinity, temperature, and inorganic nutrient concentrations (mainly nitrogen). |
format |
Other/Unknown Material |
author |
Manes, Sarah Story Gradinger, Rolf |
author_facet |
Manes, Sarah Story Gradinger, Rolf |
author_sort |
Manes, Sarah Story |
title |
Physicochemical sea ice and water characteristics near Point Barrow 2005-2006 |
title_short |
Physicochemical sea ice and water characteristics near Point Barrow 2005-2006 |
title_full |
Physicochemical sea ice and water characteristics near Point Barrow 2005-2006 |
title_fullStr |
Physicochemical sea ice and water characteristics near Point Barrow 2005-2006 |
title_full_unstemmed |
Physicochemical sea ice and water characteristics near Point Barrow 2005-2006 |
title_sort |
physicochemical sea ice and water characteristics near point barrow 2005-2006 |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.815928 https://doi.org/10.1594/PANGAEA.815928 |
op_coverage |
MEDIAN LATITUDE: 71.341268 * MEDIAN LONGITUDE: -156.587604 * SOUTH-BOUND LATITUDE: 71.328326 * WEST-BOUND LONGITUDE: -156.694406 * NORTH-BOUND LATITUDE: 71.353904 * EAST-BOUND LONGITUDE: -156.471706 * DATE/TIME START: 2005-03-14T00:00:00 * DATE/TIME END: 2006-05-30T00:00:00 |
long_lat |
ENVELOPE(-156.694406,-156.471706,71.353904,71.328326) |
genre |
Arctic Barrow Chukchi Chukchi Sea ice algae International Polar Year IPY Point Barrow Sea ice Alaska |
genre_facet |
Arctic Barrow Chukchi Chukchi Sea ice algae International Polar Year IPY Point Barrow Sea ice Alaska |
op_source |
Supplement to: Manes, Sarah Story; Gradinger, Rolf (2009): Small scale vertical gradients of Arctic ice algal photophysiological properties. Photosynthesis Research, 102(1), 53-66, https://doi.org/10.1007/s11120-009-9489-0 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.815928 https://doi.org/10.1594/PANGAEA.815928 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.81592810.1007/s11120-009-9489-0 |
_version_ |
1810292391088750592 |