Canthaxanthin in recent sediments as an indicator of heterocystous cyanobacteria in coastal waters

Magdalena Krajewska , Małgorzata Szymczak-Żyła , Justyna Kobos , Małgorzata Witak , Grażyna Kowalewska

Abstract

The mean share of heterocystous cyanobacteria in total chlorophyll-a production in coastal waters, based on cyanobacterial marker carotenoid and chloropigments preserved in recent sediments (0–5 cm, ca 30 years), has been studied in the Gulf of Gdańsk (southern Baltic) and for comparison in the Oslofjord/Drammensfjord (southern Norway). First of all, Baltic cyanobacteria, both from laboratory cultures and field samples, were analysed to select marker heterocysteous cyanobacteria carotenoids for sediments. The pigment relation to diatom percentages of different salinity preferences has been tested, to confirm origin of cyanobacteria. The results indicate that canthaxanthin is the best marker of heterocystous cyanobacteria in the southern Baltic Sea. These filamentous cyanobacteria inflow to the Gulf of Gdańsk from the open sea and their abundance has increased in the last thirty years, in comparison with previous time. In that period they made up ca 4.6% of the total chlorophyll-a production in the Gulf of Gdańsk. The estimate for Oslofjord, at the same assumptions, suggests that heterocystous cyanobacteria occurred there also (up to 5.8% of the total chlorophyll-a production), were of marine origin, but their abundance has decreased during the last thirty years. Such an estimate may be used in environmental modelling and can be applied to other coastal areas, once the marker pigments of the main cyanobacteria species have been identified, and the percentage of total chlorophyll-a produced in a basin, preserved in sediments, has been determined for such area.
Publication typeIn press (online first, early view)
Author Magdalena Krajewska
Magdalena Krajewska,,
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, Małgorzata Szymczak-Żyła
Małgorzata Szymczak-Żyła,,
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, Justyna Kobos (FOG / IO / DMarB)
Justyna Kobos,,
- Division of Marine Biotechnology
, Małgorzata Witak (FOG / IO / DMG)
Małgorzata Witak,,
- Division of Marine Geology
, Grażyna Kowalewska
Grażyna Kowalewska,,
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Journal seriesOceanologia, ISSN 0078-3234, (A 20 pkt)
Issue year2018
Pages1-11
Publication size in sheets0.5
Keywords in Englishcyanobacteria, carotenoids, canthaxanthin, Gulf of Gdańsk (southern Baltic), Oslofjord
DOIDOI:10.1016/j.oceano.2018.07.002
URL https://doi.org/10.1016/j.oceano.2018.07.002
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa - Użycie Niekomercyjne - Bez utworów zależnych (CC-BY-NC-ND); with publication
Score (nominal)20
ScoreMinisterial score = 20.0, 10-09-2018, ArticleFromJournal
Ministerial score (2013-2016) = 20.0, 10-09-2018, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.5 (2) - 2016=1.341 (5)
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