Bacterioplankton dynamics driven by interannual and spatial variation in diatom and dinoflagellate spring bloom communities in the Baltic Sea

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Camarena-Gómez, M.T., Ruiz-González, C., Piiparinen, J., Lipsewers, T., Sobrino, C., Logares, R. and Spilling, K. (2021), Bacterioplankton dynamics driven by interannual and spatial variation in diatom and dinoflagellate spring bloom communities in the Baltic Sea. Limnol Oceanogr, 66: 255-271. https://doi.org/10.1002/lno.11601

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Title: Bacterioplankton dynamics driven by interannual and spatial variation in diatom and dinoflagellate spring bloom communities in the Baltic Sea
Author: Camarena‐Gómez, María Teresa; Ruiz‐González, Clara; Piiparinen, Jonna; Lipsewers, Tobias; Sobrino, Cristina; Logares, Ramiro; Spilling, Kristian
Publisher: American Society of Limnology and Oceanography
Date: 2021
Language: en
Belongs to series: Limnology and Oceanography 66: 1, 255-271
ISSN: 0024-3590
URI: http://hdl.handle.net/10138/332696
Abstract: In parts of the Baltic Sea, the phytoplankton spring bloom communities, commonly dominated by diatoms, are shifting toward the co-occurrence of diatoms and dinoflagellates. Although phytoplankton are known to shape the composition and function of associated bacterioplankton communities, the potential bacterial responses to such a decrease of diatoms are unknown. Here we explored the changes in bacterial communities and heterotrophic production during the spring bloom in four consecutive spring blooms across several sub-basins of the Baltic Sea and related them to changes in environmental variables and in phytoplankton community structure. The taxonomic structure of bacterioplankton assemblages was partially explained by salinity and temperature but also linked to the phytoplankton community. Higher carbon biomass of the diatoms Achnanthes taeniata, Skeletonema marinoi, Thalassiosira levanderi, and Chaetoceros spp. was associated with more diverse bacterial communities dominated by copiotrophic bacteria (Flavobacteriia, Gammaproteobacteria, and Betaproteobacteria) and higher bacterial production. During dinoflagellate dominance, bacterial production was low and bacterial communities were dominated by Alphaproteobacteria, mainly SAR11. Our results suggest that increases in dinoflagellate abundance during the spring bloom will largely affect the structuring and functioning of the associated bacterial communities. This could decrease pelagic remineralization of organic matter and possibly affect the bacterial grazers communities.
Subject: bacterioplankton
dynamics
interannual
spatial
variation
spring bloom communities
Baltic Sea
diatoms
dinoflagellates
plankton
bacteria
cyanobacteria
aquatic ecosystems
seas
climate change
climate changes
biotic communities
temperature
taxonomy
salt content
salinity
species
composition
algal bloom
Subject (ysa): plankton
mikrolevät
piilevät
bakteerit
eliöyhteisöt
taksonomia
Itämeri
panssarilevät
suolapitoisuus
koostumus
leväkukinta
Iajit
lämpötila


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