speciation

Polyploidy is a mechanism often attributed to causing some speciation events in sympatry.

多倍性常被当作引起在同一地区并存的物种生物种形成事件的一种机制。

First, there is speciation (species-splitting or cladogenesis), caused by geographical isolation or some other mechanism.

首先，因地理隔离或其它一些机制导致物种形成（物种分裂或系枝化）。

This conclusion agress with the viewpoint that this species is on the speciation stage of migration towards north.

这一论支持该种目前正北迁移的分化阶段的观点。

Jolley(1993)is a study of dissolved phosphorus speciation in the lower molongolo sewage treatment plant(Canberra, Australia)detected no triphosphate in raw sewage entering the plant.

Jolley(1993)行得一项研究中在溶解磷形态下molongolo污水理厂（堪培拉，澳大利亚）未现任何未经理得污水中有三磷酸盐入工厂。