论自然选择的双重性在生物入侵中的作用

自然选择及生存竞争是生物演化的根本动力，自然选择的双重性作用在一定程度上决定外来生物入侵的结果．自然环境与入侵生物具有双向选择作用，自然选择对生物入侵既有促进作用也有抑制作用，既有有利选择也有有害选择．外来生物进入新栖息地后，由于自然选择双重作用形成与土著生物间生存竞争，逐渐产生优势特性和较强的选择压力，同时对生境产生重大干扰和改变，土著生物选择性衰败和淘汰，形成生物入侵．在论述自然选择双重性内涵基础上，用自然选择的双重性原理分析了外来生物入侵过程的基本问题，为人类控制和治理生物入侵提供参考．

The Function of Dualism of Natural Selection in Biological Invasion

Natural selection and struggle for existence is the primary drive for biological evolution. The dualism of natural selection, to some extent, determines the result of exotic biological invasion. Natural environment and invasive biology have dual choice. Natural selection promotes and inhibits the exotic species, i.e. does good or bad to exotic species. After the exotic species invades, due to the struggle for existence with the native species, it will grow to better quality and selection. Meanwhile it will greatly influence and alter the environment, and make native species inferior and thus form biological invasion. Based on the illustration of dualism of natural selection, with the application of dualism of natural selection, basic problems about biological invasion is analyzed, which provides reference for control and manipulate biological invasion.