关键词: 缙云卫矛, 濒危植物, Leslie矩阵, 种群动态

Abstract: Numeric dynamics of endangered plant Euonymus chloranthoides populations, only distributed in Chongqing, China, in the fragmented habitats including Beiwenquan, Jigongshan and Dongwenquan were analyzed in this study using static life table, fecundity schedule and Leslie’s matrix model. Static life table showed that the maximum age classes of plant individual in these three populations were 14, 13 and 9, respectively. Compared with the other two populations, Beiwenquan population had much more seedlings, but seedling population had higher disappearance rate (K_x). Fecundity schedule showed that the net reproductive rates (R₀) were higher than 1, and the intrinsic rates of increase (r_m) were higher than 0, indicating E.chloranthoides population could accomplish self-regeneration and was expanding. Numeric dynamics of E.chloranthoides population was predicted using Leslie’s matrix model. The result showed that the number of these three populations exhibited increasing trend in the future 20 years, which was consistent with the result of fecundity schedule. The endangering of E.chloranthoides was probably resulted from habitat fragmentation.

Key words: Euonymus chloranthoides, endangered plant, Leslie&rsquo, s matrix, population dynamics