科尔沁沙地三种蒿属固沙植物的种群空间分布格局分析  

Studies on Population Spatial Distribution Pattern of Three Artemisia Sand-fixing Plants in Horqin Sandy Land

作　　者：杜俊瑞[1] 苏日格嘎 王铁娟[1] 

机构地区：[1]内蒙古师范大学生命科学与技术学院,内蒙古呼和浩特010022

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2017年第4期543-547,共5页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(31160130)

摘　　要：采用2m×2m和5m×5m两种样方划分方法,调查研究了科尔沁沙地西部三种固沙植物差不嘎蒿(Artemisia halodendron)、乌丹蒿(A.wudanica)和白沙蒿(A.sphaerocephala)在迎风与背风条件下不同沙地类型的种群空间分布格局,结果表明:(1)半固定沙地的差不嘎蒿种群分布格局为集群分布,但随着沙地固定,草本植物增加,差不嘎蒿优势度明显下降,死亡率增加,到固定沙地阶段,2m×2m划分条件下变为随机分布;(2)生长在流动沙地和半固定沙地的乌丹蒿种群,在两种样方划分条件下,分布格局均为集群分布,但在半固定沙地的种群聚集度比流动沙地更高;(3)对白沙蒿种群而言,两种方法结果一致,半固定沙地的为集群分布格局,但固定沙地的白沙蒿群落仍为单优群落,且由于环境均一,种群的分布格局为均匀分布.In this paper,population spatial distribution patterns of three sand fixation plants（Artemisia halodendron,A, wudanica and A. sphaerocephala） have been studied in the western Horqin sandy land with two quadrat division methods（2 m × 2 m and 5 m × 5 m）, three different windward conditions and different types of sandy land. The results show that. （1） The population distribution pattern of Artemisia halodendron in semi-fixed sandy land is clustered. But with the increase of sand fixation and herbage number, the population dominance decreases and the mortality increases. The population distribution pattern of Artemisia halodendron is a random distribution in the 2 m×2 m quadrats of the fixed sandy land. （2） The distribution pattern of A. wu, danica in mobile sandy land and semi-fixed sandy land is clustered under two quadrat division methods,but the aggregation degree of semi-fixed sand land is higher than that of mobile sand land. （3） The results of A. sphaerocephala are consistent in two methods and show that the population distribution pattern is clustered in the semi-fixed sandy land, while still the single-dominant community in the fixed sandy land. And the distribution pattern of the population is evenly distributed due to the uniform environment.

关 键 词：种群分布格局 科尔沁沙地 差不嘎蒿 乌丹蒿 白沙蒿 

分 类 号：Q948.1[生物学—植物学] S718.5[农业科学—林学]