Ecophysiological characteristics of red, green, and brown strains of the Baltic picocyanobacterium Synechococcus sp. - a laboratory study

Sylwia Śliwińska-Wilczewska , Agata Cieszyńska , Jakub Maculewicz , Adam Latała

Abstract

The contribution of picocyanobacteria (PCY) to summer phytoplankton blooms, accompanied by an ecological crisis is a new phenomenon in Europe. This issue requires careful investigation. The present study examined the response of Synechococcus sp. physiology to different environmental conditions. Three strains of Synechococcus sp. (red BA-120, green BA-124, and brown BA-132) were cultivated in a laboratory under previously determined environmental conditions. These conditions were as follows: temperature (T) from 10 by 5 to 25C, salinity from 3 by 5 to 18 PSU, and photosynthetically active radiation (PAR) from 10 by 90 to 280µmol photons m−2s−1, which gave 64 combinations of synthetic, though realistic, environmental scenarios. Scenarios reflecting all possible combinations were applied in the laboratory experiments. Results pointed to differences in final numbers of cells among strains. However, there was also a similar tendency for BA-124 and BA-132, which demonstrated the highest concentrations of PCY cells at elevated T and PAR. This was also the case for BA-120 but only to a certain degree as the number of cells started to decrease above 190µmol photons m−2s−1PAR. Pigmentation, chlorophyll a (Chl a), fluorescence, and rate of photosynthesis presented both similarities and differences among strains. In this context, more consistent features were observed between brown and red strains when compared to the green. In this paper, the ecophysiological responses of PCY are defined.

Author Sylwia Śliwińska-Wilczewska (FOG / IO / DMEF)
Sylwia Śliwińska-Wilczewska,,
- Division of Marine Ecosystems Functioning
, Agata Cieszyńska
Agata Cieszyńska,,
-
, Jakub Maculewicz (FOG / IO)
Jakub Maculewicz,,
- Institute of Oceanography
, Adam Latała (FOG / IO / DMEF)
Adam Latała,,
- Division of Marine Ecosystems Functioning
Journal seriesBiogeosciences, ISSN 1726-4170, (A 40 pkt)
Issue year2018
Vol15
No20
Pages6257-6276
Publication size in sheets0.95
ASJC Classification1105 Ecology, Evolution, Behavior and Systematics; 1904 Earth-Surface Processes
DOIDOI:10.5194/bg-15-6257-2018
URL https://doi.org/10.5194/bg-15-6257-2018
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 40.0, 13-02-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.322; WoS Impact Factor: 2018 = 3.951 (2) - 2018=4.699 (5)
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