Speciation in Daphnia.

摘要: The microcrustacean Daphnia is arguably one of the most studied zooplankton species, having a well understood ecology, life history, and relatively evolutionary history. Despite this wealth knowledge, species boundaries within closely related in genus often remain elusive major forces driving diversity daphniids controversial. This contains more than 80 with multiple cryptic complexes, many able to hybridize. Here, we review speciation research framework current theory. We evaluate role geography, biology restricting gene flow promoting diversification. Of 253 studies on Daphnia, majority examine geographic barriers (55%). While evidence shows that play divergence, ecological are also probably prominent speciation. assess contribution nonecological reproductive isolating between found none completely. Research has disproportionally focused two pulex longispina complexes. Finally, identify areas unexplored discuss future directions build our understanding daphniids.