农牧交错带草地景观格局特征及其影响因素分析

Analysis of characteristics and influencing factors of grassland landscape pattern in the Farming-Pasturing Interlocked Areas

关键词:  草地  草地景观格局  影响因素  Logistic回归模型  农牧交错带

Key words:  grassland  grassland landscape pattern  influencing factors  Logistic regression model  Farming-Pasturing Interlocked Areas

摘要:

为研究草地景观格局，以农牧交错带的草地资源为研究对象，采用景观格局指数，从自然地理和人文社会2个方面选取影响因素，基于二元Logistic回归模型，研究内蒙古武川县哈乐镇草地斑块景观格局的空间特征及其影响因素。结果表明：哈乐镇草地景观呈现出明显的地域差异，斑块规模东南大西北小，斑块形态东南密西北稀，斑块分布东南整西北碎；自然地理和人文社会是研究区域草地景观格局特征的重要影响因素，二者共同驱动草地景观格局特征的差异性变化。其中，高程、至最近道路距离、至最近河流距离和至最近居民点距离是草地斑块规模分异的主要影响因素；高程、坡度和至最近河流距离是草地斑块形态分异的内在诱因；高程、至最近道路距离和至最近居民点距离是草地斑块分布差异的重要驱动因素。

Abstract:

The study aims to investigate the spatial characteristics and influence of patch landscape pattern of the grassland in Hal town, Wuchuan county, Inner Mongolia. Designating the grassland in the Farming-Pasturing interlocked areas as the object, the research is based on binary Logistic regression model, utilizing the landscape pattern index and influential factors from natural geography and human society.The grassland landscape of Hale Town shows obvious regional difference. The patch scale is larger in the southeast and smaller in the northwest; the patch form is dense in the southeast and sparse in the northwest;the fragmentation of patch distribution is low in the southeast and high in the northwest.Natural geography and humanistic society are crucial factors during the study of grassland landscape patch characteristic in this region, incentivizing the diversification of grassland landscape.The main influential factors of grassland patch scale diversity are related to elevation, distance to the nearest road, distance to the nearest river, and distance to the nearest residential area; the intrinsic inducement of morphological differentiation of grassland patch is involved in elevation, slope, and distance to the nearest river; the driving factors of the difference in the distribution of grassland patches are elevation, distance to the nearest road and distance to the nearest residential area.