摘要
为监测缙云卫矛种群动态变化,对重庆市北碚板子沟、北温泉内、北温泉后山和鸡公山4个地点种群的年龄结构、静态生命表等进行了研究,并与以往的研究进行了对比分析。结果表明：1）各种群中间龄（4~11龄级）占比较大;2）板子沟种群幼苗（1~3龄级）较少,其余种群较丰富;3）板子沟种群呈现一定的衰亡趋势,其余种群年龄结构基本呈稳定型,但稳定性较差,相对稳定性鸡公山种群比2004年有所增强,北温泉后山种群则有所下降;4）种群死亡率并不呈现出特有规律和趋势,总体上幼龄植株和老龄（12龄级以后）植株死亡率较大,12、13龄不是最大生理寿命,最大生理寿命在18龄,北温泉内为12龄,北温泉后山为14龄,鸡公山为16龄;5）年龄结构组成不合理、种群小等为缙云卫矛濒危的主要因素。
The age structure and static life table of Euonymus chloranthoides population in four sites of Chongqing city were determined to monitor its population dynamics.The results showed that the population with 4～11 age-class had a large proportion in all populations,the seedlings with 1～3 age-class were less in Banzigou site and the seedlings with 1～3 age-class were abundant in three other sites,the population in Banzigou site presented a certain senescence trend,the age structure of populations in three other sites but its stability was poor,the relative stability of population age structure in Jigongshan site increased compared with that in 2004 and the relative stability of population age structure in Beiwenquan back hill declined,the population mortality did not present the special regulation and trend,the mortality of plants with lower age-class and12 age-class was high,the maximum physiological longevity was 18 age-class,the maximum physiological longevity in inner-Beiwenquan,Beiwenquan back hill and Jigongshan sites was 12,14 and 16 age-class respectively,and the irrational age structure and small population were main factors to result in its endangerment.
出处
《贵州农业科学》
CAS
北大核心
2011年第4期27-31,共5页
Guizhou Agricultural Sciences
基金
中国-欧盟生物多样性项目"重庆市珍稀濒危特有植物保护现状调查"(00060222)
关键词
缙云卫矛
特有及模式物种
种群动态
Euonymus chloranthoides
specific modlel species
population dynamics
