人为干扰强度对村级景观破碎度的影响

村落具有人类活动所造成的许多景观特征，是研究人为干扰对景观破碎度影响的良好场所；本文运用地表植被的改变状况和主要辅助能的投入为指标，按重度干扰强度、中度干扰强度和轻度干扰强度3个等级把村落分为中心区、过渡区和基质区，分别不同研究区的景观破碎度与人为干扰强度的相互关系，3个研究区域的斑块密度指数分别为0．3416、0．3109和0．0028；景观破碎度分别为0．0820、0．0746和0．0007，重度干扰和中度干扰比轻度干扰下景观具有明显高的斑块密度指数和破碎化指数，随着人为干扰强度的增加，景观破碎化程度相应增加，中度人为干扰使景观破碎度值较高。

Impact of human disturbance on fragmentation of village-level landscape.

Village has the characteristics of landscape disturbed by human's activities.It is a very good object to deplore the effect of human disturbance on landscape fragment.Based on vegetation change and major auxiliary energy input,the disturbance was divided into three levels,e.g.,strong,moderate and slight disturbances.Accordingly,the village environment was divided into three zones,center zone,transition zone and base zone,and the relationship between landscape fragment and human disturbance intensity was analyzed for each zone.The results showed that the total patch density indexes in three zones were 0.3416,0.3109 and 0.0028,and the landscape fragment indexes in three zones were 0.0820 ,0.0746 and 0.0007 respectively.Landscape fragment was closely related to disturbance degree,and stronger disturbance result in higher landscape fragment indexes.Moreover,there existed high landscape fragment indexes under moderate disturbance.