多空间粒度下镇江市土地利用景观格局差异  

Research on the Differences of Landscape Patterns Under Several Spatial Granularities in Zhenjiang City

作　　者：冀亚哲[1] 张小林[1] 吴江国[1] 李红波[1] 

机构地区：[1]南京师范大学地理科学学院,江苏南京210046

出　　处：《中国土地科学》2013年第5期54-62,F0002,共10页China Land Science

基　　金：国家自然科学基金项目(40471037)

摘　　要：研究目的:对因空间粒度变化导致的镇江市土地利用景观格局变化的差异及机理进行分析。研究方法:GIS,概率矩阵和景观生态学方法。研究结果:采用中心属性原则所得到的4种空间粒度下土地利用景观格局,优势景观类型对空间粒度变化不敏感;空间粒度增加的过程中,各景观类型主要流向为耕地,显示耕地景观的基质特性,其他景观类型则镶嵌其中;景观水平上,景观破碎度减小,景观的空间连接性上升,景观要素类型空间分布不均衡,优势斑块类型的比例上升,其他斑块类型的优势度下降,斑块分布更为分散;中心值原则保证各景观类型组分与现状图保持基本一致。在类型水平上,景观基质(耕地)面积上呈增大、空间上呈连片的趋势;景观廊道表现为连通性降低、逐渐被分割。研究结论:景观格局指数对空间粒度变化的响应不同,景观类型对空间粒度变化的响应也有所不同,需要进一步细化研究。Our purpose is to demonstrate the differences of landscape patterns under several spatial granularities and analyze the behind reasons.We combined GIS and landscape analysis method to calculate the spatial transfer probability matrix and landscape pattern indices based on the land use data of Zhenjiang City in 2009. The results show that 1 ） the landscape patterns in terms of four spatial granularities had obvious edge effects, which were converted according to the cell-yields-to-cell method. The landscape types which occupied less than others were more sensitive to spatial granularities. 2） The feature of the area flows was cultivated land as the spatial granularity changes. It was the basic and common characteristic of the land use changes. The probability matrixes expressed that the flows of the landscapes would be more contiguously occupied if the spatial granularity changed. The transfer probability among the landscape types reflected the spatial connection of them. Besides, the land use for cities, towns, villages and industries was the second type of the landscape. 3） Regarding landscape level, the diversity, heterogeneity and fragmentation of landscapedecreased as the spatial granularity rose. Meanwhile the spatial connectedness and landscape dominance increased. Cell Center method used in converting spatial granularity resulted in the same proportion of converted landscape types as the original data. 4） Regarding the category level, the spatial connectedness of cultivated land which was the main landscape category increased gradually as the spatial granularity raised. The land for transports and irrigation were disconnected and divided gradually. The paper concludes that it is an effective measure to analyze the difference of landscape pattern under different spatial granularities combing spatial transfer probability matrix with landscape indices, although there are many rooms for future research.

关 键 词：土地利用 景观格局 空间粒度 概率矩阵 镇江市 

分 类 号：F301.2[经济管理—产业经济]