As tides go by. Spatial genetic structure of the seeweed cladophoropsis membranacea.

The variety of life histories found in seaweeds has fascinated evolutionary biologist, ecologists and phycologists for the past century. This evolutionary diversity ranges from the familiar monophasic diploid forms to bi- and tri-phasic alternations of generations. Many separately described species were later found to be the alternate, free-living haploid und free-living diploid phases of a single species. In addition, one or both phases may reproduce clonally thus further complicating the dynamics of their life histories. The presence of both haploid and diploid free-living forms raises questions about the evolutionary maintenance of these life cycles as well as their ecological significance. What advantages can such complicated life histories confer?

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