青藏高原东部边缘区域生态景观格局动态变化分析

An Analysis on Dynamic Changes in Ecological Landscape Patterns at the Eastern Fringes of the Qinghai-Tibetan Plateau

选取国家划定的青藏高原东部边缘生物多样性保护优先区为研究对象,以2010年和2015年2期卫星遥感影像资源为数据源,利用ArcGIS技术,采用生态景观矩阵转移和生态景观指数分析方法,对研究区域生态景观格局动态变化和景观特征进行分析。结果表明:2010-2015年,研究区域I级、Ⅱ级生态景观格局总体比较稳定,变化不明显,局部生态景观受自然环境和社会环境影响等因素的影响,生态景观格局发生了一定的变化;利用生态景观指数法分析表明研究区域景观破碎化程度较高,景观类型复杂,但景观格局总体表现比较稳定,动态变化不明显。

The eastern fringes of the Qinghai-Tibetan plateau has been identified as a priority area of biodiversity protection by the State. As the study area, taking the satellite remote sensing images in the years of 2010 and 2015 as the data source and using ArcGIS technique, the analytical methods of ecological landscape matrix transfer and ecological landscape index were adopted to analyse dynamic changes in the ecological landscape patterns and the landscape characteristics. The result has shown that, in the study area, the class I and class II ecology landscape patterns were comparatively stable whilst no evident changes occurred. Certain changes happened in localised ecological landscape affected by several factors such as natural environment and social environment. It was indicated that by using the ecological landscape index to analyse the study area, there was a relatively high degree of landscape fragmentation with complicated landscape types whilst the landscape patterns were found stable as a whole without showing obvious dynamic changes.