Bleaching of Baikalian sponge affects the taxonomic composition of symbiotic microorganisms

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• 作者：O. V. Kaluzhnaya ; V. B. Itskovich
• 关键词：Lake Baikal ; sponges ; Lubomirskia baicalensis ; symbiotic community ; bleaching process
• 刊名：Russian Journal of Genetics
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：51
• 期：11
• 页码：1153-1157
• 全文大小：234 KB
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• 作者单位：O. V. Kaluzhnaya (1)
  V. B. Itskovich (1)
  
  1. Limnological Institute, Siberian Branch of the Russian Academy of Science, Irkutsk, 664033, Russia
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Biomedicine
  Human Genetics
  Animal Genetics and Genomics
  Microbial Genetics and Genomics
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3369

文摘

The diversity of 16S rRNA genes in the microbial community of endemic sponge Lubomirskia baicalensis with bleached patches of tissue was studied. Eight bacterial phyla were identified in the sponge microbiome: Cyanobacteria (27.3%; n = 36; 2 OTU, operational taxonomic unit), Proteobacteria (22.7%; n = 30; 5 OTU), Actinobacteria (16.7%; n = 22; 7 OTU), Verrucomicrobia (15.2%; n = 20; 4 OTU), Planctomycetes (9%; n = 12; 3 OTU), Bacteroidetes (4.5%; n = 6; 3 OTU), WS5 (3%; n = 4; 1 OTU), and TM7 (1.5%; n = 2; 1 OTU). The basic phyla typical for freshwater sponge microbiomes are present in the community. However, in contrast to previously studied L. baicalensis bacterial associations in the bleached sponge community, a dominance of Cyanobacteria and a low number of representatives of the Bacteroidetes and Betaproteobacteria were observed. Phylotypes exhibiting a high percentage of similarity with the microorganisms inhabiting substrates rich in organic matter were also found. Clearly, the bleaching processes of Baikal sponges affect the composition and the ratio of the major taxonomic groups of sponge-associated bacteria.