Effects on the relationship between the invasive alien species Red-billed Leiothrix and native bird communities under high density of Sika deer

为了了解入侵红嘴相思鸟和西卡鹿对当地鸟类群落的影响，对红嘴相思鸟入侵后不同年限的地区进行了鸟类群落调查。密度下降，不仅红嘴相思鸟，但也本地灌木层用户在该地区的林下植被的下降是显着的。另一方面，红嘴相思鸟的密度在林下植物生长的地方以较高的密度增加，使林莺的密度降低。

In order to understand the effect on the native bird communities by invasive Red-billed Leiothrix and Sika deer, bird communities were investigated in the region where the number of years after Red-billed Leiothrix's invasion was different. The density decreased to not only the Red-billed Leiothrix but also native bush layer users in the region where the decline of undergrowth is remarkable. On the other hand, the density of the Red-billed Leiothrix increased in a high density in the place where the undergrowth grows, and it made the density of the Bush Warbler decrease.