天水市土地利用景观格局的幅度效应研究

Study on the extent effect of land use landscape pattern in Tianshui as a case study

采用梯度环与景观格局指数相结合的方法,分析了天水市土地利用景观格局的幅度效应。结果表明:1)不同景观要素的幅度效应存在差异,景观水平指数的幅度效应也存在差异。2)景观要素和景观水平指数在5-25 km幅度区间内尺度效应差异较大, 25-85 km幅度区间内尺度效应差异较小,>85 km幅度区间尺度效应减弱或消失。研究结果可以反映土地利用格局的空间特征及空间变化规律,并为土地规划与管理、土地用途管制措施的制定提供参考依据。

Extent effect of land-use landscape pattern was analyzed with landscape pattern index based on grading ring in Tianshui, Gansu province, China. The results showed that the extent effect of different landscape elements was different, and the extent effect of landscape level index was also different. Extent effect of different landscape elements and landscape level indices differed greatly within the range of 5-25 km range, and then smaller in the range of 25-85 km;the extent effect weakened or disappeared beyond 85 km range. The results could reflect the spatial characteristics and spatial patterns of land use patterns, then providing a reference for planning and management of land, and formulating of measures of use control.