Colonization and speciation mechanisms of an invading insect pest

美国白蛾在北美有一个姊妹种。我们研究了物种形成的模式和全球变暖对生活史适应的影响，这两个方面是殖民物种在殖民后所面临和经历的适应，即，竞争和对当地气候条件的适应结果表明，这两个同胞种是不同的物种，生殖隔离是由昼夜节律和季节生活史的分化。从二化性/三化性生命周期的过渡稳步向北移动，可能是全球变暖的推动。

Hyphantria cunea has a sibling species in the North America. We investigated the mode of speciation and the effect of global warming on the life cycle adaptation, the two aspects that colonizing species faces and undergoes adaptation after colonization, i.e., competition and adaptation to lacal climatic condition. The results suggest that the two sibling species are distinct species and the reproductive isolation is effected by differentiation in circadian clock and seasonal life cycle. The transition from bivoltine/trivoltine life cycle steadily moves northerly year by year, probably pushed by global warming.