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 organization: Environmental Sciences
Tvärminne Zoological Station
Jaanika Blomster / Principal Investigator
Life Science Education
Marine Ecosystems Research Group
Teachers' Academy
Date: 2017-02
Language: eng
Number of pages: 15
Belongs to series: European Journal of Protistology
ISSN: 0932-4739
DOI: https://doi.org/10.1016/j.ejop.2016.10.005
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
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: acceptedVersion


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