Physical, chemical, and biological water column characteristics in June 2015 in Kongsfjorden (Spitsbergen)
Glacial meltwater discharge in fjords on the west coast of Spitsbergen is increasing due to climate change. The influence of this discharge on phytoplankton nutrient limitation, composition, productivity and photophysiology was investigated in central (M) and inner (G) Kongsfjorden (79°N, 11°40'...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.878242 2023-05-15T17:05:15+02:00 Physical, chemical, and biological water column characteristics in June 2015 in Kongsfjorden (Spitsbergen) van De Poll, Willem H MEDIAN LATITUDE: 78.925683 * MEDIAN LONGITUDE: 12.197150 * SOUTH-BOUND LATITUDE: 78.905717 * WEST-BOUND LONGITUDE: 12.018817 * NORTH-BOUND LATITUDE: 78.945650 * EAST-BOUND LONGITUDE: 12.375483 * DATE/TIME START: 2015-06-05T00:00:00 * DATE/TIME END: 2015-06-29T00:00:00 2017-07-25 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.878242 https://doi.org/10.1594/PANGAEA.878242 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.878242 https://doi.org/10.1594/PANGAEA.878242 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: van De Poll, Willem H; Kulk, Gemma; Rozema, Patrick D; Brussaard, Corina P D; Visser, Ronald J W; Buma, Anita G J (2018): Contrasting glacial meltwater effects on post-bloom phytoplankton on temporal and spatial scales in Kongsfjorden, Spitsbergen. Elementa - Science of the Anthropocene, 6(1), 50, https://doi.org/10.1525/elementa.307 Dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.878242 https://doi.org/10.1525/elementa.307 2023-01-20T07:33:59Z Glacial meltwater discharge in fjords on the west coast of Spitsbergen is increasing due to climate change. The influence of this discharge on phytoplankton nutrient limitation, composition, productivity and photophysiology was investigated in central (M) and inner (G) Kongsfjorden (79°N, 11°40'E). Freshwater influx intensified stratification during June 2015, coinciding with surface nutrient depletion. Surface nutrient concentrations were negatively correlated with stratification strength at station M. Here, nitrate addition assays revealed increasing N limitation of surface phytoplankton during the second half of June, which was followed by a pronounced compositional change within the flagellate-dominated phytoplankton community as dictyochophytes (85% of chl a) were replaced with smaller haptophytes (up to 60% of chlorophyll a) and prasinophytes (20% of chlorophyll a). These changes were less pronounced at station G, where surface phosphate, ammonium and nitrate concentrations were occasionally higher, and correlated with wind direction, suggesting wind-mediated transport of nutrient-enriched waters to this inner location. Therefore, glacial meltwater discharge mediated nutrient enrichment in the inner fjord, and enhanced stratification in inner and central Kongsfjorden. Surface chlorophyll a and water column productivity showed 3–4-fold variability, and did not correlate with nutrient limitation, euphotic zone depth, or changed taxonomic composition. However, the maximum carbon fixation rate and photosynthetic efficiency showed weak positive correlations to prasinophyte, cryptophyte, and haptophyte chlorophyll a. The present study documented relationships between stratification, N limitation, and changed phytoplankton composition, but surface chlorophyll a concentration, phytoplankton photosynthetic characteristics, and water column productivity in Kongsfjorden appeared to be driven by mechanisms other than N limitation. Dataset Kongsfjord* Kongsfjorden Spitsbergen PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(12.018817,12.375483,78.945650,78.905717) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
Glacial meltwater discharge in fjords on the west coast of Spitsbergen is increasing due to climate change. The influence of this discharge on phytoplankton nutrient limitation, composition, productivity and photophysiology was investigated in central (M) and inner (G) Kongsfjorden (79°N, 11°40'E). Freshwater influx intensified stratification during June 2015, coinciding with surface nutrient depletion. Surface nutrient concentrations were negatively correlated with stratification strength at station M. Here, nitrate addition assays revealed increasing N limitation of surface phytoplankton during the second half of June, which was followed by a pronounced compositional change within the flagellate-dominated phytoplankton community as dictyochophytes (85% of chl a) were replaced with smaller haptophytes (up to 60% of chlorophyll a) and prasinophytes (20% of chlorophyll a). These changes were less pronounced at station G, where surface phosphate, ammonium and nitrate concentrations were occasionally higher, and correlated with wind direction, suggesting wind-mediated transport of nutrient-enriched waters to this inner location. Therefore, glacial meltwater discharge mediated nutrient enrichment in the inner fjord, and enhanced stratification in inner and central Kongsfjorden. Surface chlorophyll a and water column productivity showed 3–4-fold variability, and did not correlate with nutrient limitation, euphotic zone depth, or changed taxonomic composition. However, the maximum carbon fixation rate and photosynthetic efficiency showed weak positive correlations to prasinophyte, cryptophyte, and haptophyte chlorophyll a. The present study documented relationships between stratification, N limitation, and changed phytoplankton composition, but surface chlorophyll a concentration, phytoplankton photosynthetic characteristics, and water column productivity in Kongsfjorden appeared to be driven by mechanisms other than N limitation. |
format |
Dataset |
author |
van De Poll, Willem H |
spellingShingle |
van De Poll, Willem H Physical, chemical, and biological water column characteristics in June 2015 in Kongsfjorden (Spitsbergen) |
author_facet |
van De Poll, Willem H |
author_sort |
van De Poll, Willem H |
title |
Physical, chemical, and biological water column characteristics in June 2015 in Kongsfjorden (Spitsbergen) |
title_short |
Physical, chemical, and biological water column characteristics in June 2015 in Kongsfjorden (Spitsbergen) |
title_full |
Physical, chemical, and biological water column characteristics in June 2015 in Kongsfjorden (Spitsbergen) |
title_fullStr |
Physical, chemical, and biological water column characteristics in June 2015 in Kongsfjorden (Spitsbergen) |
title_full_unstemmed |
Physical, chemical, and biological water column characteristics in June 2015 in Kongsfjorden (Spitsbergen) |
title_sort |
physical, chemical, and biological water column characteristics in june 2015 in kongsfjorden (spitsbergen) |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.878242 https://doi.org/10.1594/PANGAEA.878242 |
op_coverage |
MEDIAN LATITUDE: 78.925683 * MEDIAN LONGITUDE: 12.197150 * SOUTH-BOUND LATITUDE: 78.905717 * WEST-BOUND LONGITUDE: 12.018817 * NORTH-BOUND LATITUDE: 78.945650 * EAST-BOUND LONGITUDE: 12.375483 * DATE/TIME START: 2015-06-05T00:00:00 * DATE/TIME END: 2015-06-29T00:00:00 |
long_lat |
ENVELOPE(12.018817,12.375483,78.945650,78.905717) |
genre |
Kongsfjord* Kongsfjorden Spitsbergen |
genre_facet |
Kongsfjord* Kongsfjorden Spitsbergen |
op_source |
Supplement to: van De Poll, Willem H; Kulk, Gemma; Rozema, Patrick D; Brussaard, Corina P D; Visser, Ronald J W; Buma, Anita G J (2018): Contrasting glacial meltwater effects on post-bloom phytoplankton on temporal and spatial scales in Kongsfjorden, Spitsbergen. Elementa - Science of the Anthropocene, 6(1), 50, https://doi.org/10.1525/elementa.307 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.878242 https://doi.org/10.1594/PANGAEA.878242 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.878242 https://doi.org/10.1525/elementa.307 |
_version_ |
1766059676512813056 |