Abstract
The rapid colonization by microscopic plants of natural bare rock surfaces in an intertidal habitat was investigated. The sequence of colonization (from bacteria, to diatoms to blue-green algae and spores of macroalgae) was illustrated by scanning electron micrographs. The endpoint assemblage was characterised by the blue-green alga Anacysus sp., and a number of diatoms and spores. The rapid speed of recovery to the endpoint community (within 4 wk) and the nature of the conlmunity itself differed from those described in similar habitats, possibly as a result of the grazing regime at the site studed.
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