Skip to Main content Skip to Navigation
Journal articles

Brown Rot Syndrome and Changes in the Bacterial Сommunity of the Baikal Sponge Lubomirskia baicalensis

Abstract : Mass mortality events have led to a collapse of the sponge fauna of Lake Baikal. We describe a new Brown Rot Syndrome affecting the endemic species Lubomirskia baicalensis. The main symptoms are the appearance of brown patches at the sponge surface, necrosis, and cyanobacterial fouling. 16S rRNA gene sequencing was used to characterize the bacterial community of healthy versus diseased sponges, in order to identify putative pathogens. The relative abundance of 89 eubacterial OTUs out of 340 detected has significantly changed between healthy and diseased groups. This can be explained by the depletion of host-specific prokaryotes and by the appearance and proliferation of disease-specific OTUs. In diseased sponges, the most represented OTUs belong to the families Oscillatoriaceae, Cytophagaceae, Flavobacteriaceae, Chitinophagaceae, Sphingobacteriaceae, Burkholderiaceae, Rhodobacteraceae, Comamonadaceae, Oxalobacteraceae, and Xanthomonadaceae. Although these families may contain pathogenic agents, the primary causes of changes in the sponge bacterial community and their relationship with Brown Rot Syndrome remain unclear. A better understanding of this ecological crisis will thus require a more integrative approach.
Document type :
Journal articles
Complete list of metadata

Cited literature [85 references]  Display  Hide  Download
Contributor : Stéphane GREFF Connect in order to contact the contributor
Submitted on : Wednesday, April 25, 2018 - 9:15:00 AM
Last modification on : Friday, January 21, 2022 - 2:26:05 PM
Long-term archiving on: : Wednesday, September 19, 2018 - 2:19:46 PM


Files produced by the author(s)



Nina Kulakova, Maria Sakirko, Renat Adelshin, Igor Khanaev, Ivan Nebesnykh, et al.. Brown Rot Syndrome and Changes in the Bacterial Сommunity of the Baikal Sponge Lubomirskia baicalensis. Microbial ecology, Springer Verlag, 2018, 75 (4), pp.1024-1034. ⟨10.1007/s00248-017-1097-5⟩. ⟨hal-01765879⟩



Record views


Files downloads