南宁市青秀山风景区景观格局动态研究

景观格局是景观生态学研究的主要内容之一,在生物多样性保护方面具有重要的作用。运用景观生态学原理,借助地理信息系统技术,选取景观多样性、分维数、均匀度等指数,分析了南宁市青秀山风景区不同景观类型的空间分布及其动态变化特征,并定量分析了景观格局演变的驱动力。结果显示,人类活动的干扰是青秀山景观格局演变的主导因素,在整个研究区域中,景观多样性和均匀度逐年增高,除针阔混交林和纯林外,各景观类型的斑块数都有所增加,斑块形状在经过1985年比较大的波动后,趋于规则。

A tentative exploration of the dynamic landscape pattern of qingxiushan mountain interesting area in nanning city

Landscape pattern is a main content of landscape ecology which plays an important role in biodiversity conservation. In this paper, the landscape diversity, mean patch fractal dimension and landscape evenness were calculated to analyze the spatial structure and dynamic character of landscape pattern in Qingxiushan mountain area in Nanning city. The result indicated that human activities were the determining factors of landscape pattern. Through comparing natural features and features of human activity with the landscape indices, we found that the determining factors in different of landscape districts are not the same. Landscape diversity and evenness of Qingxiushan Mountain increased with time. The phenomenon which one of the landscape type occupied a dominant position has not been found. Except the Conifer and Broadleaf mixture forest, the number of patch of each landscape increased with time. The shape of patch was more complex in 1985, since then, it became more regular with time. So the forest in Qingxiushan mountain was disturbed intensively by human activities.