砒砂岩区种植沙棘后的景观空间分布格局

Landscape Pattern in Soft Sandstone Area in Different Periods after Seabuckthorn Planting

通过对晋陕蒙砒砂岩区沙棘生态工程实施前一年(1998年)、中期(2003年)、最后一年(2008年)3个控制年份景观格局的分析,发现沙棘的连接度指数由2003年的93.015 8增加到2008年的95.634 3,距离指数则由93.745 0下降到83.333 7,说明随着沙棘种植面积的扩大,其自身的团聚程度也在逐步提高,显示其具有良好的团聚潜力,斑块之间相互联系的程度也在提高;而盖沙地、未利用地连接度指数较小,距离指数增加,反映其受人为干扰加剧,人为改造和利用使更多的盖沙地和未利用地被沙棘、林地等景观类型占据,从而形成更为和谐的景观格局。

The analysis of landscape pattern for the seabuckthorn project in the Soft Sandstone Area（SSA）from 1998（one year before the project）,2003（middle year of the project）,2008（the last year of the project）showed that connect index had increased from 93.015 8 in 2003 to 95.634 3 in 2008,and the distance index had decreased from 93.745 0 in 2003 to 83.333 7 in 2008,which indicated that the aggregation degree of seabuckthorn had been gradually enhanced due to the increased seabuckthorn planting.On the contrary,the connect index of sand,unused types had been increased due to the artificial influences of planting and transforming,to form a more harmonious landscape pattern.