基于Quick Bird数据的胡杨、柽柳种群格局分析

Population's Pattern Analysis based on High-resolution Remote Sensing Images of Quick Bird

[目的]对塔里木河下游主要木本植物胡杨、柽柳的树冠进行解译。根据解译结果,使用修正后最近邻体法分析胡杨、柽柳的格局分布。[方法]基于Quick bird数据,采用人机对话目视解译方法。[结果]胡杨和柽柳在不同离河距离均为聚集分布,格局强度胡杨随离河距离加大(地下水埋深降低)而增加,到离河1500 m又减小;柽柳灌丛格局强度总体上呈随离河距离增加而降低的趋势。运用高分辨遥感数据确定胡杨、柽柳群落分布格局,取得了与传统地面调查相同的结果,用遥感方法从定量角度验证了干旱区荒漠区胡杨、柽柳群落大都为聚集分布的定性结论。[结论]在植被稀疏的干旱荒漠区使用高分辨遥感数据可以定量分析木本植物建群种的分布格局特征。

[ Objective and Method ] The crown of the lower reaches of Tarim River Populus main woody plants was interpreted by using man -machine dialogue visual interpretation method basing on the Quick Bird data. According to the interpretation of results, the modified nearest neighbor analysis method was employed to analyze the distribution pattern of Populus euphratica. [ Result ] The results showed that： Populus euphratica and Tamarix were aggregated distribution away from the different distances of the river, the intensity pattern of Populus euphratica was increasing with increased distance from the river, until it decreased 1,500 m away from the River; Tamarix pattern intensity showed lowering trend on the whole with the decreasing distances away from the river. High resolution remote sensing data determine the distribution pattern of tamarisk and Populus euphratica community, which was the same with conventional ground survey＇s result, Remote sensing method from the perspective of quantity verified aggregated distribution of most Populus euphratica and Tamarix communities in arid desert zone. [ Conclusion ] High resolution remote sensing data can be used as a quantitative analysis of the distribution pattern characteristics of a woody plants built group in the sparsely vegetated arid desertification area.