A community perspective on the concept of marine holobionts: state-of-the-art, challenges, and future directions
2019
Host-microbe interactions play crucial roles in
marine ecosystems, but we still have very little understanding of the mechanisms that govern these relationships, the evolutionary processes that shape them, and their ecological consequences. The
holobiontconcept is a renewed paradigm in biology that can help describe and understand these
complex systems. It posits that a host and its associated microbiota, living together in a long-lasting relationship, form the
holobiont, and have to be studied together, as a coherent biological and functional unit, in order to understand the biology, ecology and evolution of the organisms. Here we discuss critical concepts and opportunities in marine
holobiontresearch and identify key challenges in the field. We highlight the potential
economic,
sociological, and environmental impacts of the
holobiontconcept in marine biological, evolutionary, and
environmental scienceswith comparisons to terrestrial science whenever appropriate. A deeper understanding of such
complex systems, however, will require further technological and conceptual advances. The most significant challenge will be to bridge functional research on simple and tractable model systems and global approaches. This will require scientists to work together as an (inter)active community in order to address, for instance, ecological and evolutionary questions and the roles of
holobiontsin
biogeochemical cycles.
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