Climate change impact on primary production and phytoplankton taxonomy in Western Spitsbergen fjords based on pigments in sediments

Magdalena Krajewska , Małgorzata Szymczak-Żyła , Wojciech Tylmann , Grażyna Kowalewska

Abstract

Arctic climate changes are of global significance. This work investigates the influence of climate change on primary production and phytoplankton taxonomic composition in the western Spitsbergen fjords over the last century, using pigments in sediments. Nine sediment cores were analysed for chloropigment and carotenoid contents, and the five found to be richest in pigments were dated (210Pb, 137Cs) and analysed for additional parameters (Corg, Ntot, δ13C, grain size). The three well-dated cores, representing the last 70–130 y, were selected for tracking primary production and phytoplankton taxonomy changes in the past. The sum of chloropigments-a (∑Chlns-a) in the undisturbed sediments is a good marker of primary production in the adjacent Spitsbergen fjord waters. The sum of 19′-hexanoyloxyfucoxanthin and 19′-hexanoyloxy-4-ketofucoxanthin to diatoxanthin ratio (∑Hexcs/Diato) in sediments is proposed as a proxy of changes in haptophytes to diatom and dinoflagellate proportions, connected with climate variability. ∑Chlns-a and ∑Hexcs/Diato ratio sediment profiles have shown that the impact of global warming on primary production and phytoplankton taxonomic composition is observed even in the north of Spitsbergen. In the most northern studied site, Raudfjorden, visible effects of warming started about a decade later than in Kongsfjorden. Recent high primary production in Kongsfjorden and Raudfjorden is related to a high proportion of haptophytes compared to diatoms and dinoflagellates, linked to warm Atlantic Water inflow. In Hornsund, primary production was also observed to have increased, but not as rapidly as at other sites, probably due to a greater influence of cold Arctic Water.
Author Magdalena Krajewska
Magdalena Krajewska,,
-
, Małgorzata Szymczak-Żyła
Małgorzata Szymczak-Żyła,,
-
, Wojciech Tylmann (FOG / IG / DGQG)
Wojciech Tylmann,,
- Department of Geomorphology and Quarternary Geology
, Grażyna Kowalewska
Grażyna Kowalewska,,
-
Journal seriesGlobal and Planetary Change, ISSN 0921-8181, e-ISSN 1872-6364, (N/A 140 pkt)
Issue year2020
Vol189
Pages1-12
Publication size in sheets0.55
Article number103158
Keywords in Englishpigments, phytoplankton, climate change, sediments, Spitsbergen, Arctic
ASJC Classification1910 Oceanography; 2306 Global and Planetary Change
DOIDOI:10.1016/j.gloplacha.2020.103158
URL https://doi.org/10.1016/j.gloplacha.2020.103158
Languageen angielski
LicenseRepository; published final; Uznanie Autorstwa - Użycie Niekomercyjne - Bez utworów zależnych (CC-BY-NC-ND); with publication
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Krajewska_Magdalena_Szymczak_Zyla_Malgorzata_Tylmann_Wojciech_Kowalewska_Grazyna_Climate_change_impact_2020.pdf 1.14 MB
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 03-05-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.549; WoS Impact Factor: 2018 = 4.1 (2) - 2018=4.746 (5)
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LicencjaUtwór jest udostępniany na licencji Creative Commons Uznanie autorstwa-Użycie niekomercyjne-Bez utworów zależnych 4.0 Międzynarodowe (CC BY-NC-ND 4.0) https://creativecommons.org/licenses/by-nc-nd/4.0/
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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