塔里木河流域胡杨和灰叶胡杨克隆分株空间分布格局  

Spatial distribution pattern of Populus euphratica and P. pruinosa clonal ramets in Tarim River Basin,China

作　　者：赵正帅 郑亚琼[1,2] 梁继业[1,2] 韩占江[1,2] 李志军[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]塔里木大学植物科学学院,新疆阿拉尔843300

出　　处：《应用生态学报》2016年第2期403-411,共9页Chinese Journal of Applied Ecology

基　　金：国家科技支撑计划项目(2013BAC10B01);国家重点基础研究发展计划项目(2012CB723204);国家自然科学基金项目(31260072)资助~~

摘　　要：以叶尔羌河下游阿瓦提县天然胡杨和灰叶胡杨混交林、塔里木河上游农一师16团天然灰叶胡杨林和塔里木河中游轮台县天然胡杨林为对象,研究胡杨和灰叶胡杨克隆分株种群的空间分布格局.结果表明:8种不同取样尺度(5 m×5 m、5 m×10 m、5 m×15 m、10 m×10 m、10 m×15 m、15 m×15 m、15 m×20 m、20 m×20 m)下,3个研究区2物种克隆分株种群的空间分布格局均表现为集群分布,表明集群分布是研究区胡杨和灰叶胡杨克隆分株种群空间分布格局的基本属性;在5 m×5 m尺度上,3个研究区2物种克隆分株种群均表现出负二项参数最小、Cassie指标和聚块性指标最大、聚集强度最大的分布特征.Spatial distribution pattern of Populus euphratica and P. pruinosa clonal ramets at three sites was studied, including natural mixed forest of P. euphratica and P. pruinosa in Awati County located in the downstream of Yarkant River, natural P. pruinosa forest in Group 16 of Nongyishi in the Tarim River upstream area, and natural P. euphratica forest in Luntai County located in the middle reach of the Tarim River. The clonal ramets of the three sites showed a cluster distribution pattern at eight sampling scales, i.e., 5 m×5 m, 5 m×10 m, 5 m×15 m, 10 m×10 m, 10 m×15 m, 15 m×15 m, 15 m×20 m, and 20 m×20 m. This pattern revealed that the cluster distribution was a basic property in the spatial distribution pattern of P. euphratica and P. pruinosa populations. At 5 m×5 m scale, negative binomial parameter was minimum, while Cassie index, patchiness index and aggregation strength were maximum for the two ramet populations at the three sites.

关 键 词：胡杨 灰叶胡杨 克隆分株 空间分布格局 

分 类 号：S792.11[农业科学—林木遗传育种]