巢湖水陆交错带土地利用景观格局梯度分析

Analysis on Gradient Characteristic of Landscape Pattern of Land Use in Chaohu Lake-Land Ecotone

通过解译巢湖水陆交错带2013年Landsat 8遥感影像,提取土地利用类型信息,运用景观格局指数和地理空间插值法分析研究区的景观格局特征。在景观格局分析基础上选择代表性样带,应用移动缓冲带法对景观梯度变化进行研究,以期为巢湖水陆交错带的土地利用、生态环境保护和景观优化提供参考。结果表明:景观破碎度、景观多样性在空间分布及梯度变化上表现出较高的区域分布一致性,即二者的高值、低值分布区相匹配。景观优势度在不同特征的样带内表现出不同的变化特点,其变化不仅受斑块面积的影响,用地布局对其影响更大。景观连通性在各个样带内均较高,各景观类型的斑块内部之间连接紧密。

We aim to analyze the landscape pattern characteristics by extracting the land use type information by the image data of Land Resources Satellite Landsat 8in 2013 and using landscape pattern index and geographical spatial interpolation method.Representative samples were selected based on the landscape pattern analysis,and the landscape change was examined by moving buffer method.We hope to provide the references for land use,ecological environment protection and landscape optimization in the study area through this research.The resutls show that both landscape fragmentation and landscape diversity have the high distribution consistency in spatial distribution and gradient change.That′s to say,the values of landscape fragmentation and landscape diversity have the high correlation in geographical space.Landscape dominance shows different change characteristics in each sample zone,which are influenced by the size of landscape patches and land layout has a more effect on it.At last,landscape connectivity in every sample zone is high,showing a close connection between the same types of patches in the study area.