摘要
在随机取样、解剖的基础上，对岷江上游灌丛优势种刺旋花（Convolvulustragacuthoiedes）建立种群静态生命表进行统计分析，以探索其在该地区特殊的生态学意义。结果表明：刺旋花种群的年龄结构为稳定发展型，存活曲线接近于decvyⅢ型；生活史中分别在1a和4～5a有两个死亡高峰；种群数量变化可用年龄结构模型Xx＝3．37·x－3．21（其中x表示年龄，Xx表示种群数量）来预测．X2检验法和区组样方方差法的格局分析结果都表明：刺旋花种群的分布格局随生境破碎程度和水分状况有很大差异，在不同样地分别趋向于随机分布和集群分布.
Convolvulus tragacuthoiedes, a dominant species of the semiarid scrubs in the upper reaches of the Minjiang River was studied to explore its ecological significance in this region. A life table of C. tragacuthoiedes population was built based on random sampling and anatomical study. The results showed that the age structure was of stable development type, the survival curve approximated to the Decvy Ⅲ, and the two mortality peaks in its life history were at the ages 1 a and 4 a^5 a, respectively. The dynamics of C. tragacuthoiedes population could be described by the following model: Xx=3. 37·x-3.21 (r=0. 801,P<0.05；where Xx= number of survival, x=age). The results of both X2-test and blocked -quadrat variance(BQV)analyses indicated that the distribution pattern of the C. tragacuthoiedes population, due to the distinctdegree of ground surface tettering and water content, tends to be random and aggregative distribution respectively in the two plots studied.
出处
《应用与环境生物学报》
CAS
CSCD
1997年第3期193-193,共1页
Chinese Journal of Applied and Environmental Biology
基金
国家"八五"攻关
中国科学院成都地奥科学基金
关键词
刺旋花
分布格局
种群
生态学
Convolvulus tragacuthoiedes
life table
age structure
survival curve
distribution pattern
