四川冶勒自然保护区垂枝香柏年龄结构研究  

Age structure of Sabina pingii in yele natural reserve of Sichuan Province

作　　者：李松茂[1] 叶先华 曾永海 王大勇 李丽纯[1] 林雯[1] 王丽[1] 

机构地区：[1]四川大学生命科学学院,成都610064 [2]四川冶勒自然保护区,凉山615600

出　　处：《四川大学学报（自然科学版）》2007年第1期186-190,共5页Journal of Sichuan University(Natural Science Edition)

基　　金：垂枝香柏物种资源调查(保护国际CEPF)

摘　　要：调查分析了四川省冶勒自然保护区内垂枝香柏的年龄结构，编制了静态生命表；绘画了存活曲线、死亡率曲线和消失率曲线；并探讨了垂枝香柏的更新．结果表明：①该树种平均年龄较大。约为277年．②存活曲线处于Deevey-Ⅱ型和Deevey-Ⅲ型之间，死亡率与消失率变化趋势一致．种群生存率呈单调下降趋势，生存率下降趋势前期相对稳定，中期逐渐增大，后期又趋向于稳定，说明垂枝香柏种群相对稳定，并有一定的更新能力．③保护区内垂枝香柏整个生长期中，200年以前，死亡率变化相对平缓，200年以后，死亡率急剧上升，在320年-440年之间达到平衡，440年以后出现了两个死亡高峰，一个出现在中老年阶段（460年附近），自然火灾可能是其死亡的主要因素；另一个出现在过熟林阶段（640年附近），环境制约和植株本身生活力的降低可能是其高死亡率的根本原因．Age structure of Sabina pingii in Yele Natural Reserve of Sichuan Province was assayed, and the specific life table was drawn. In addition, the curve of mortality rate, hazard rate and survival rate were constructed, and the regeneration of Sabina pingii was discussed. The results showed that： ① The average age of Sabina pingii was relatively old; it is about 277 years old; ②The survival curve of the population was between the type of Deevey-Ⅲ and the type of Deevey- Ⅱ, the mortality rate displayed similar change dynamics to the lose rate. With an increase in the population mortality ratio and a decrease in the survival rate, the survival rate decreased slowly in the early stage, sharp in the middle stage, and slowly again in the final stage. It showed that the population was relatively steady, and had some ability of regeneration. ③ Before 200 years, the mortality rate changed slowly, after 200 years, the mortality rate increased sharply, and between 340 years and 430 years, it reached balance. There were two peaks of mortality after 440 years. One was appear 460 years, and the other in 640 years. It was shown that the two mortality peaks were due to the severe environmental damage and abiotrophy of old individual.

关 键 词：垂枝香柏 生命表 存活曲线 四川冶勒自然保护区 

分 类 号：Q948[生物学—植物学]