Photosynthetic Picoeukaryotes Diversity in the Underlying Ice Waters of the White Sea, Russia

The White Sea is a unique basin combining features of temperate and arctic seas. The current state of its biocenoses can serve as a reference point in assessing the expected desalination of the ocean as a result of climate change. A metagenomic study of under-ice ice photosynthetic picoeukaryotes (P...

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Bibliographic Details
Published in:Diversity
Main Authors: Tatiana A. Belevich, Ludmila V. Ilyash, Irina A. Milyutina, Maria D. Logacheva, Aleksey V. Troitsky
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2020
Subjects:
white sea
under-ice water
picoeukaryotes
micromonas
mantoniella
high-throughput sequencing
metagenomics
18s rdna
Biology (General)
QH301-705.5
Arctic
White Sea
Climate change
Online Access:https://doi.org/10.3390/d12030093
https://doaj.org/article/9f63aeb058444ffa8237574667f8fabe
Description
Summary:The White Sea is a unique basin combining features of temperate and arctic seas. The current state of its biocenoses can serve as a reference point in assessing the expected desalination of the ocean as a result of climate change. A metagenomic study of under-ice ice photosynthetic picoeukaryotes (PPEs) was undertaken by Illumina high-throughput sequencing of the 18S rDNA V4 region from probes collected in March 2013 and 2014. The PPE biomass in samples was 0.03−0.17 µg C·L −1 and their abundance varied from 10 cells·mL −1 to 140 cells·mL −1 . There were representatives of 16 algae genera from seven classes and three supergroups, but Chlorophyta, especially Mamiellophyceae, dominated. The most represented genera were Micromonas and Mantoniella . For the first time, the predominance of Mantoniella (in four samples) and Bolidophyceae (in one sample) was observed in under-ice water. It can be assumed that a change in environmental conditions will lead to a considerable change in the structure of arctic PPE communities.

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