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题名	塔里木河流域胡杨种群特征与动态分析
作者	吴俊侠
学位类别	硕士
答辩日期	2009
授予单位	中国科学院．新疆生态与地理研究所
授予地点	北京
导师	张希明，中科院新疆生态与地理研究所
关键词	胡杨种群
其他题名	Characteristic and dynamics analysis of Populus euphratica populations of Tarim River
学位专业	生态学
中文摘要	本文通过样地调查和数据统计，对塔里木河流域不同生境条件下胡杨(Populus euphratica Oliv.)种群的径级结构、年龄结构、生命表及存活曲线进行了比较分析；同时，采用种群动态量化方法及时间序列预测方法，分析了种群数量的动态变化，并对胡杨种群未来的发展趋势进行了预测，为胡杨种群的保护与可持续管理提供了科学依据。结果显示：塔里木河上游、中游（1）胡杨种群的年龄结构呈金字塔型，幼龄级所占比例较大，种群个体随年龄的增大而减少,存活曲线接近DeeveyШ(凹)型，且动态指数大于0，表明胡杨种群结构较合理，为增长型种群。（2）生存曲线、累计死亡率曲线、死亡密度曲线和危险率曲线表明，胡杨种群具有前期种群数量幅度变化较大，后期逐渐趋于稳定的特点。（3）时间序列分析表明随着时间的推移，胡杨中龄级和大龄级植株数量均呈增加趋势，在30年后胡杨种群进入成熟阶段。塔里木河下游河岸（1）胡杨种群结构接近正态分布，幼龄级和老龄级株树所占比例较小，存活曲线接近DeeveyI型，且动态指数小于0，说明下游胡杨种群幼苗资源匮乏，结构不合理，表现为衰退型种群。（2）胡杨种群的死亡密度曲线和危险率曲线变化趋势基本一致，都在第30年时出现峰值。（3）时间序列分析表明在未来10、20及30年后，老龄个体逐渐增多，幼龄株数将更显不足,最终老龄株数也将呈现急剧减少的衰退势态。By a field investigation and data analysis, we developed a static life table of Populus euphratica population based on the population life table and theory of survival analysis. Survivorship curves, survival rate，cumulative mortality rate，mortality density and hazard rate were determined, and population dynamics were analyzed using time sequence analysis and flop index. The purpose forecasted development tendency of P. euphratica populations and provided a certain scientific references to protection for P. euphratica populations. The results showed: at upper and middle reaches of Tarim River (1) Size structure of populations showed positive pyramidal type and Younger age-class individuals had higher percentages. The individuals of P. euphraticu Population decreased with age, the survivorship curve of the population conforming to the type of DeeveyШ(concave-type). Moreover, development index more than 0, this explained Population Structure was rational, which was progressive population. (2)Four function curves indicated that variation amplitude of P. euphratica populations was great at the initial stage and small at the late stage. (3) Time sequence prediction models showed that the numbers of middle age-class and old age-class individuals would increase. After 30 years, P. euphratica populations gradually would stabilize. In the lower reaches of Tarim River（1）Age structure of population approximated to normal distribution. Younger and older individuals of P. euphratica had fewer percentages and the survivorship curve of the population conformed to the type of DeeveyI, belonging to degenerative growth type. Development index less than 0, this explained there were lacks of the seedlings in lower reaches. Population Structure was not rational. (2) One peak of mortality rate and killing power existed in the lifespan after 30 years. The population survival rate of P. euphratica decreased monotonically, whereas the cumulative mortality rate increased monotonically. (3) Time sequence prediction models for the population after 10, 20, 30 years showed that the numbers of older individuals would increase. The number of Younger individuals was more lack. Ultimately, the number of older individuals also appeared to decreasing.
学科主题	植物生态学
公开日期	2010-11-12
页码	共50页
内容类型	学位论文
源URL	[http://ir.xjlas.org/handle/365004/8448]
专题	新疆生态与地理研究所_中国科学院新疆生态与地理研究所(2010年以前数据)
推荐引用方式 GB/T 7714	吴俊侠. 塔里木河流域胡杨种群特征与动态分析[D]. 北京. 中国科学院．新疆生态与地理研究所. 2009.

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