城乡建设用地景观格局多尺度差异

以郑州市域内1989、2000和2009年的典型城市与农村样地（25 km×25 km）为例,应用空间自相关、半方差、以及九项轨迹方差分析方法,对城市与农村建设用地景观多尺度上的空间格局特征与动态差异进行研究,结果表明,（1）城市建设用地景观聚集强度较高,斑块规模较大,而农村建设用地景观在大部分尺度上呈随机或均匀分布,斑块规模较小。（2）随着尺度的增加,城市及农村建设用地景观分布状态都由聚集向均匀过渡,但前者过渡较为平缓,而后者在小尺度范围（0~2km）变化速度较快,在较大尺度（3~16 km）上其分布状态的波动较小。（3）1989-2009年,城市与农村建设用地景观动态特征有较大差异,并表现出尺度依赖性。城市较小尺度上（0~4 km）建设用地景观的分布状态表现出聚集-分散的趋势,在较大尺度上（8~14 km）表现出分散-聚集的变化趋势。农村小尺度上（0~4 km）建设用地景观的分布状态也表现出聚集-分散的趋势,但大尺度（4~16 km）上状态变化很小且没有规律。

Spatial pattern differences between urban and rural construction land in multi-scales

Taking typical urban and rural plots（25 km×25 km） in 1989,2000,2009 of Zhengzhou as subjects,the differences in spatial pattern and dynamic between urban and rural construction land were explored with spatial auto-correlation analysis,semi-variance analysis and nine-term local quadrat variance（9TLQV）.The results showed that： 1） Urban construction land showed a more clustered pattern with larger patches,while rural construction land was prone to show a random or uniform pattern with smaller patches.2） As the scale increases,the distribution pattern of both urban and rural construction land transited from clustered to uniform.Transition in urban construction land is slower than that in rural construction land,while transition in rural construction land was sharper in small-scale（0-2 km） and relatively slower in large scale（3-16 km）.3） From 1989 to 2009,the landscape dynamics of urban and rural construction land were quite different,and were scale-dependent.The distribution of urban construction land showed variation from aggregation to dispersion in small-scale（0-4 km）,and from dispersion to aggregation in large scale（8-14 km）.The distribution of rural construction land showed the variation from aggregation to dispersion in small-scale（0-4 km） and slight changes in large-scale（4-16 km）.