生境破碎化后濒危植物缙云卫矛种群的数量动态  

Numeric Dynamics of Endangered Plant Euonymus chloranthoides Populations after Habitat Fragmentation

作　　者：林永慧[1] 何兴兵[1] 田启建[1] 胡文勇[1] 陈玲[1] 何平[2] 

机构地区：[1]吉首大学生物资源与环境科学学院,吉首416000 [2]西南大学生命科学学院,重庆400715

出　　处：《植物研究》2011年第4期443-450,共8页Bulletin of Botanical Research

基　　金：湖南省教育厅项目(10C1118);湖南省科技厅项目(2009FJ3041);湖南省自然科学基金项目(10JJ6053);湖南省生态学重点建设学科开放基金项目(JSS200902);吉首大学人才引进启动基金项目(2005);国家自然科学基金项目(40971151)资助

摘　　要：运用种群静态生命表、生殖力表和Leslie矩阵模型,研究了重庆特有濒危植物缙云卫矛在北温泉、鸡公山和东温泉3个片断生境中种群的数量动态。静态生命表结果显示3个种群的最大龄级分别为14、13、9龄;相对于其它两个种群,北温泉种群表现出数量较多的幼苗,但同时该样地幼苗种群表现出较高的种群消失率(Kx)。种群生殖力表显示3个种群的净增殖率(R0)均大于1,内禀增长率(rm)均大于0,表明缙云卫矛种群可以完成自我更新,种群表现出正增长。Leslie矩阵模型对缙云卫矛种群进行的数量预测结果显示缙云卫矛3个种群20年后均表现出数量的增长,这与生殖力表显示的结果一致。缙云卫矛的濒危可能是其生境破碎化引起的。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（Kx）.Fecundity schedule showed that the net reproductive rates（R0） were higher than 1,and the intrinsic rates of increase（rm） 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.

关 键 词：缙云卫矛 濒危植物 Leslie矩阵 种群动态 

分 类 号：Q949.754.7[生物学—植物学]