Biogeographic Differences in the Microbiome and Pathobiome of the Coral Cladocora caespitosa in the Western Mediterranean Sea

Frontiers in Microbiology

Cristina Linares¹  Diego K. Kersting¹  Esther Rubio-Portillo²  Josefa Antón²  Alfonso A. Ramos-Esplá³ 

[1] Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, Barcelona, Spain;Department of Physiology, Genetics and Microbiology, University of Alicante, Alicante, Spain;Marine Research Centre of Santa Pola, University of Alicante, Alicante, Spain;Working Group on Geobiology and Anthropocene Research, Institute of Geological Sciences, Freie Universität Berlin, Berlin, Germany;

关键词: Cladocora caespitosa;    necrosis;    microbiome;    pathobiome;    Mediterranean Sea;    amplicon sequencing;   

DOI  :  10.3389/fmicb.2018.00022

来源: DOAJ

【 摘 要 】

The endemic Mediterranean zooxanthellate scleractinian reef-builder Cladocora caespitosa is among the organisms most affected by warming-related mass mortality events in the Mediterranean Sea. Corals are known to contain a diverse microbiota that plays a key role in their physiology and health. Here we report the first study that examines the microbiome and pathobiome associated with C. caespitosa in three different Mediterranean locations (i.e., Genova, Columbretes Islands, and Tabarca Island). The microbial communities associated with this species showed biogeographical differences, but shared a common core microbiome that probably plays a key role in the coral holobiont. The putatively pathogenic microbial assemblage (i.e., pathobiome) of C. caespitosa also seemed to depend on geographic location and the human footprint. In locations near the coast and with higher human influence, the pathobiome was entirely constituted by Vibrio species, including the well-known coral pathogens Vibrio coralliilyticus and V. mediterranei. However, in the Columbretes Islands, located off the coast and the most pristine of the analyzed locations, no changes among microbial communities associated to healthy and necrosed samples were detected. Hence, our results provide new insights into the microbiome of the temperate corals and its role in coral health status, highlighting its dependence on the local environmental conditions and the human footprint.

【 授权许可】

Unknown