Sea-ice eukaryotes of the Gulf of Finland, Baltic Sea, and evidence for herbivory on weakly shade-adapted ice algae

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Majaneva , M , Blomster , J , Mueller , S , Autio , R , Majaneva , S , Hyytiainen , K , Nagai , S & Rintala , J-M 2017 , ' Sea-ice eukaryotes of the Gulf of Finland, Baltic Sea, and evidence for herbivory on weakly shade-adapted ice algae ' , European Journal of Protistology , vol. 57 , pp. 1-15 . https://doi.org/10.1016/j.ejop.2016.10.005

Title: Sea-ice eukaryotes of the Gulf of Finland, Baltic Sea, and evidence for herbivory on weakly shade-adapted ice algae
Author: Majaneva, Markus; Blomster, Jaanika; Mueller, Susann; Autio, Riitta; Majaneva, Sanna; Hyytiainen, Kirsi; Nagai, Satoshi; Rintala, Janne-Markus
Contributor: University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
Date: 2017-02
Number of pages: 15
Belongs to series: European Journal of Protistology
ISSN: 0932-4739
URI: http://hdl.handle.net/10138/309517
Abstract: To determine community composition and physiological status of early spring sea-ice organisms, we collected sea-ice, slush and under-ice water samples from the Baltic Sea. We combined light microscopy, HPLC pigment analysis and pyrosequencing, and related the biomass and physiological status of sea-ice algae with the protistan community composition in a new way in the area. In terms of biomass, centric diatoms including a distinct Melosira arctica bloom in the upper intermediate section of the fast ice, dinoflagellates, euglenoids and the cyanobacterium Aphanizomenon sp. predominated in the sea-ice sections and unidentified flagellates in the slush. Based on pigment analyses, the ice-algal communities showed no adjusted photosynthetic pigment pools throughout the sea ice, and the bottom-ice communities were not shade-adapted. The sea ice included more characteristic phototrophic taxa (49%) than did slush (18%) and under-ice water (37%). Cercozoans and ciliates were the richest taxon groups, and the differences among the communities arose mainly from the various phagotrophic protistan taxa inhabiting the communities. The presence of pheophytin a coincided with an elevated ciliate biomass and read abundance in the drift ice and with a high Eurytemora affinis read abundance in the pack ice, indicating that ciliates and Eurytemora affinis were grazing on algae. (C) 2016 Elsevier GmbH. All rights reserved.
Subject: 18S rRNA gene
Accessory pigments
Herbivory
Photoacclimation
Sea ice
RIBOSOMAL-RNA GENE
CHLOROPHYLL-A DEGRADATION
PROTISTAN COMMUNITY
MCMURDO SOUND
ARCTIC-OCEAN
PHYTOPLANKTON
WATER
DINOFLAGELLATE
DIVERSITY
NUTRIENT
1183 Plant biology, microbiology, virology
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