N. Rädecker, C. Pogoreutz, C.R. Voolstra, J. Wiedenmann, C. Wild
Trends in Microbiology, 23(8), pp. 490-497, (2015)
Coral bleaching, Coral disease, Coral holobiont, Nutrient limitation, Symbiodinium, Symbiosis
Corals are animals that form close mutualistic associations with endosymbiotic photosynthetic algae of the genus Symbiodinium.
Together they provide the calcium carbonate framework of coral reef
ecosystems. The importance of the microbiome (i.e., bacteria, archaea,
fungi, and viruses) to holobiont functioning has only recently been
recognized. Given that growth and density of Symbiodinium
within the coral host is highly dependent on nitrogen availability,
nitrogen-cycling microbes may be of fundamental importance to the
stability of the coral–algae symbiosis and holobiont functioning, in
particular under nutrient-enriched and -depleted scenarios. We summarize
what is known about nitrogen cycling in corals and conclude that
disturbance of microbial nitrogen cycling may be tightly linked to coral
bleaching and disease.