Analysis of Bacterial Communities of Two Lake Baikal Endemic Sponge Species

초록

Bacterial diversity of two Lake Baikal endemic sponges characterized by different life forms, branching Lubomirskia baicalensis and encrusting Baikalospongia sp., was studied using 454 pyrosequencing of the 16S rRNA gene fragments. In the communities associated with L. baicalensis and Baikalospongia sp., 426 and 428 OTUs, respectively, were identified. In microbial associations of these sponges, 24 bacterial phyla with predominance of Bacteroidetes, Proteobacteria, and Actinobacteria were identified. Analysis of the taxonomic composition of bacterial communities of the sponges was carried out by searching the dominant phylotypes within the clusters of phylum level. Comparison of bacterial associations of the sponges with Lake Baikal bacterioplankton revealed both the shared OTUs and the unique ones characteristic of the studied species.

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