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Abstract

Reef corals are especially sensitive to environmental change since their survival is dependent on a delicate balance between the coral host and its algal endosymbiont. Predicting the responses of reef ecosystems to global climate change requires a detailed understanding of the diversity of both partners in this symbiosis. The current perception of coral-inhabiting symbiont diversity at nuclear ribosomal DNA is shown in this issue of Molecular Ecology to be a significant underestimate of the wide diversity that in fact exists. Apprill & Gates (2007) reveal eight- to tenfold greater diversity than previous methods had identified. The authors underline the importance of detailed knowledge of su..