Forest fragmentation has immeasurable effects on birds. The population dynamics, population genetics and local evolution of birds are to some extent affected by the changes of environment.
森林生境片断化对生活在其中的鸟类产生着难以估量的影响，鸟类的种群动态、种群遗传和局部进化等都不同程度地受环境变化的影响。
The changes of environment and climate are major subjects of global change study field.
环境与气候的变化是全球变化研究领域的中心课题。
The changes of environment and climate are major subjects of global change study field.
环境与气候的变化是全球变化研究领域的中心课题。
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