呼伦贝尔草甸草原景观格局时空演变分析——以海拉尔及周边地区为例

选用海拉尔及周边地区1986,1991,1996和2001年4个时期的TM/ETM数据,在实地调查的基础上,结合监督分类的方法将研究区域分为水体、沙地、农田、城镇和草原5类,并依据NDVI植被指数将草原划分为高盖度草原、较高盖度草原、中盖度草原和低盖度草原4个等级,运用景观生态学原理对以上8类景观格局的时空演变进行分析研究。结果表明,1986-2001年15年间,研究区域内人类活动显著增强,草原景观的面积急剧减少、破碎化程度加剧,主导景观类型由较高、高盖度草原转变为中、低盖度草原,道路、城镇、农田周边的沙地景观扩张明显,草原植被状况恶化惊人。城镇景观破碎化程度下降,斑块集中连片,研究区域经济发展模式正处于由粗放型向城市化集约型模式转变的阶段。

Analysis of dynamic spatial-temporal changes of landscape patterns in Hulunber meadow steppes--Taking Hailaer and surrounding areas as an example

The dynamic spatial-temporal changes of landscape patterns in and around Halaer were analysed.First,the research area was divided into water,sand,farmland,city,and grassland based on remote sensing images of 1986,1991,1996 and 2001,and on field investigations.Second,the grasslands were classified into highest coverage grassland,high coverage grassland,medium coverage grassland and low coverage grassland using a Normalized Difference Vegetation Index.Finally,the dynamic spatial-temporal changes of the eight ...