Asexual reproduction also affects the distribution and abundance of many species. Parts of branching corals are commonly scattered by storms only to re-grow as a multitude of new colonies. This does not in itself aid long distance dispersal, but it may greatly enhance the reproductive output, hence the genetic impact, from the settlement of a single planula larva. There are many other mechanisms of asexual reproduction that may play the same role. These include the formation of satellite colonies in Goniopora, the ‘bail-out’ of polyps as a result of stress, the expulsion of fully developed polyps in place of planulae, the budding of acanthocauli in fungiids and other corals, and autotomy in Diaseris.