基于GIS的广州市萝岗区景观格局梯度分析

基于GIS的梯度分析与景观格局定量分析相结合的方法,研究了广州市萝岗区景观在城市化梯度上的空间特征。结果表明:①萝岗区的景观结构中,林地为优势景观,占整个景观比例53%左右,而占2.57%的推平未利用地则表明萝岗区的景观结构并不稳定;②类型水平上的景观格局指数分析表明各种景观类型沿着梯度区表现出独特的空间特征,明显反映了城市化的梯度和前沿;③景观水平的格局分析表明城市化导致景观的破碎化程度增大,异质性增高,并且景观形状越来越复杂,景观向多样化和均匀化发展。

GIS based gradient analysis of landscape pattern in LuoGang Section of Guangzhou City

Landscape gradient characteristics was analyzed quantitatively based on GIS approach for LuoGang section of Guangzhou.The following conclusion was drawn: First,forest landscape is still dominated by covering 53% of total area,while Planned urban area consisted 2.57% of the area,which represented an unstable landscape pattern;Second,The urbanization center and frontier could be identified precisely with class-level landscape indices.Different landscape types exhibited distinctive spatial signatures along the Gradient’s part;Third,landscape fragmentation and heterogeneity induced by the urbanization could be quantified by landscape-level indices,Furthermore the shapes of landscape becomes more and more complicated,landscape tended to become more diverse.