Speciation in Man-Made Environments

Abstract

The increasing number of threatened species and the loss of biodiversity on earth are the most terrible crisis we are faced to at the moment. However, it is speculated here that there are species which must have diversified in the developed areas or under human influences. The fern species with agamosporous life cycle seem to be diversified, at least to some extent, in the man-made environments after the Neolithic Age. Origin and development of the agamosporous fern species are synthetically considered under a focus of the speciation under the influence of humans. Diversification in flora and fauna seems to be partly added in artificial environments probably through evolution in simple combination of mutations, although these agamosporous species are not quite natural and have strayed down blind allies of their evolutionary cources.