Influences of time- spatial existence patterns of forests on insect genetic characteristics -especially on insects living in beech forests-

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From the genetic analyses of the genus Platycerus, the Paratrichius doenitzi species group, the genus Megalopaederus, Syntypistis punctatella and so on, insects in cool temperate broad-leaved deciduous forests, as represented by Fagus crenata were suggested to possess high genetic diversity in southwestern Japan. In some taxa, geographical genetic divergence results in the speciation. It was suggested to be especially important to conserve small and fragmented broad-leaved deciduous forests in southwestern Japan for the conservation of genetic diversity and the speciation origin in insects adapted to cool temperate zones.