塔里木河中游不同生境胡杨种群的结构特征分析  

Population Structure Characteristics of Populus euphraticain Different Habitats of the Tarim River Middle Reaches

作　　者：王夏楠[1] 王亮[1] 吕瑞恒[1,2] 梁继业[1,2] 周正立[1,2] 

机构地区：[1]新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室,新疆阿拉尔843300 [2]新疆塔里木大学植物科学学院,新疆阿拉尔843300

出　　处：《西北林学院学报》2014年第5期1-6,共6页Journal of Northwest Forestry University

基　　金："973"计划前期研究专项(2012CB723204);"973"计划前期研究专项(2011CB411909);国家自然科学基金(31360109)

摘　　要：应用"相邻格子法"对塔里木河中游不同生境胡杨种群进行调查,研究不同生境胡杨种群径级结构和空间分布格局。结果表明:1)不同生境下胡杨径阶结构不同,河漫滩生境胡杨幼苗充足,为增长型种群;过渡地带各径阶分布合理,为稳定型种群;而沙地生境径阶≤16cm的胡杨种群未出现,为衰退型种群。2)河漫滩以及过渡地带生境胡杨种群在5种空间尺度下均处于集群分布;沙地生境总体为随机分布。3种生境下胡杨种群均在5m×5m的尺度有较强的聚集性。3)河漫滩、过渡带生境下各个发育阶段均为集群分布,沙地生境随着发育进程,空间分布由聚集分布向随机分布转化。An investigation was carried out on Populus euphratica populations occurring in different habitats in the middle reaches of Tarim River by applying ＂adjacent lattice method＂ to understand the size class structure and distribution patterns.The results showed that：1）class structures were different among populations in different habitats.Adequate seedlings were found in floodplain habitat,belonging to growing population.In the transitional habitat,the size classes were reasonable,belonging to stable population.In sandy habitat,seedlings with the diameter of less than 16cam were not found,belongs to declining type.2）Poplar populations in floodplain and transitional habitats were in cluster distribution pattern in five kinds of spatial scales,it was in a random distribution for those in sandy habitat.In the scale of the5mx 5m,the poplar populations demonstrated strong concentrated characteristics.3）The spatial distributions were clumped distribution in floodplain and transitional habitats.The populations changed from clumped to random pattern during their growth in sandy habitat.

关 键 词：胡杨 生境 径级结构 分布格局 

分 类 号：S718.5[农业科学—林学]