西双版纳景观格局时空变化及其生态效应研究

Spatial-temporal Dynamic Changes of Landscape Patterns and Its Ecological Effect in Xishuangbanna

西双版纳景观格局演变对合理利用区域土地和维护生态平衡具有重要意义。以四期Landsat影像为数据源,研究了西双版纳1990年-2010年的景观格局变化特征,分析其生态效应。结果表明:林地景观面积减少293 km2,斑块数量一直增加;灌木林景观面积增加,斑块数量持续减少;耕地面积增加,斑块数量增加,表明在经济发展时,生物环境逐渐恶化;各类地表景观形状复杂程度增加,破碎化程度加重,分布趋于均匀化,表明在人类活动干扰下,生态环境质量呈现下降趋势,不利于生物的保护。

It＇s of great significance to use regional land reasonably and maintain the balance of ecological by researching landscape pattern evolution in Xishuangbanna. Based on Landsat remote sensing images, analyze the landscape pattern and ecological effects from 1990 to 2010 in Xishuanghanna. Results show that with the development of economy, the ecological environment become terrible. While the forest landscape area has reduced 293 km^2, plaque quantity has increased; while shrub landscape area has increased, the continued reduction in the number of plaque. Cultivated land area and plaques area are keep increasing trend. Besides, the complexity of all kinds of surface landscape has increased, fragmentation degree has aggravated and the distribution has been in the state of uniform. , which show that the ecological environment quality keep a trend of decline, which is unfavorable for the protection of biodiversity under the disturbance of human activities.