An ancestral species might have adapted to exploit a particular ecologicalniche on one island and then traveled over water to colonize other islands.
一个原始物种可能已经适应了利用一个岛屿上特定的生态位,然后在水上迁徙到其他岛屿定居。
2
The physical structure of species competing for resources in the same ecologicalniche tends to gradually evolve in ways that allow them to occupy different niches.