关键词: 沈阳市, 城市森林, 小气候特征

Abstract: The proliferation of plateau pika (Ochotona curzonia) aggravates the degradation of alpine meadow, and rodenticides are commonly used to annihilate plateau pika. However, the poisoning program can only transitorily reduce the abundance of plateau pika, and the remnant population can recover rapidly. Therefore, to control plateau pika via contraception is considered. This paper discussed in theory how contraception control affects the population of plateau pika. Mathematical models of plateau pika with sexual structure were formulated to assess the effects of two sexes’ contraception rates on the dynamics of plateau pika population, and to clarify the difference between contraception control and lethal control. It was indicated that contraception control would have better effects than lethal control on eliminating or depressing plateau pika population. In contraception control, the contraception rate of female is more important, and thus, more attention should be paid to it.

Key words: Shenyang City, Urban forest, Microclimate character