Autumn to spring microbial community in the northern Baltic Sea : temporal variability in bacterial, viral and nanoflagellate abundance during the cold-water season

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http://hdl.handle.net/10138/334563

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Kaikkonen, L., Enberg, S., Blomster, J. et al. Autumn to spring microbial community in the northern Baltic Sea: temporal variability in bacterial, viral and nanoflagellate abundance during the cold-water season. Polar Biol 43, 1193–1206 (2020). https://doi.org/10.1007/s00300-020-02700-8

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Julkaisun nimi: Autumn to spring microbial community in the northern Baltic Sea : temporal variability in bacterial, viral and nanoflagellate abundance during the cold-water season
Tekijä: Kaikkonen, Laura; Enberg, Sara; Blomster, Jaanika; Luhtanen, Anne-Mari; Autio, Riitta; Rintala, Janne-Markus
Julkaisija: Springer Nature
Päiväys: 2020
Kieli: en
Kuuluu julkaisusarjaan: Polar Biology 43 9 (2020)
ISSN: 0722-4060
DOI-tunniste: https://doi.org/10.1007/s00300-020-02700-8
URI: http://hdl.handle.net/10138/334563
Tiivistelmä: Marine microbial communities undergo drastic changes during the seasonal cycle in high latitude seas. Despite the dominance of microbial biomass in the oceans, comprehensive studies on the seasonal changes of microbial plankton during the complete winter period are lacking. To study the seasonal variation in abundance of the microbial community, water samples were collected weekly in the Northern Baltic Sea from October to May. During ice cover from mid-January to April, samples from the sea ice and the underlying water were taken in addition to the water column samples. Abundances of bacteria, virus-like particles, nanoflagellates, and chlorophyll a concentrations were measured from sea ice, under-ice water, and the water column, and examined in relation to environmental conditions. All studied organisms had clear seasonal changes in abundance, and the sea-ice microbial community had an independent wintertime development compared to the water column. Bacteria were observed to have a key role in the biotic interactions in both ice and the water column, and the dormant period during the cold-water months (October–May) was limited to before ice formation. Our results provide the first insights into the temporal dynamics of bacteria and viruses during the whole cold-water season (October–May) in coastal high latitude seas, and demonstrate that changes in the environmental conditions are likely to affect bacterial dynamics and have implications on trophic interactions.
Avainsanat: bacteria
Baltic Sea
nanoflagellates
VLP
sea ice
time series
Asiasanat (ysa): bakteerit
itämeri
nanoflagellaatit
VLP
meren jää
aikasarjat
Tekijänoikeustiedot: CC BY 4.0


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