中国东部沿海地区耕地和建设用地连通性变化——以山东省平度市为例
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国家自然科学基金项目"东西部土地集约利用变化及其生态风险的对比研究"[41371531(2014-2017)];中国科学院地理科学与资源研究所所长资助项目"土地利用强度变化及其生态风险评价模式研究"[2013SJ008(2013-2016)]


Connectivity Change of Cultivated Land and Construction Land in Eastern Coastal China-A Case Study in Pingdu City in Shandong Province
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    [目的] 以中国东部沿海地区的山东省平度市为案例区,分析研究区2005-2013年耕地和建设用地的连通性及其核心斑块格局变化的特征,为有效保护区域耕地,合理规划建设用地提供科学依据。[方法] 基于斑块的景观指数分析方法,构建了案例区耕地和建设用地整体连通性指数(ⅡC)、可能连通性指数(PC)及斑块重要值(dI),以反映区域内两种地类的连通性和各斑块重要性。[结果](1)与耕地相比较,平度市的建设用地分布格局受人类活动的影响较大;(2)建设用地的连通性显著增加,相反耕地的连通性有所下降;(3) 2013年平度市耕地核心斑块的面积占耕地面积的99%,而建设用地的核心斑块面积仅占建设用地面积的79%。[结论] 耕地核心斑块属于连通性好,利用效益较好的耕地分布区,其数量和质量均应得到有力保护。建设用地核心斑块具有连通性好,地理位置好的特点,应加强此类建设用地的无节制扩张控制和现有建设用地的合理规划利用,同时应不断控制建设用地的污染物排放,保持良好环境质量,避免污染附近耕地。

    Abstract:

    [Objective] Taking Pingdu City in Shandong Province as a case study, this paper analyzed the changes in land use pattern, land-type connectivity and core patches of cultivated land and construction land from 2005 to 2013, in order to provide a scientific basis for protecting area cultivated land effectively and planning construction land reasonable.[Methods] Based on the analysis of landscape index, we calculated integral index of connectivity(ⅡC), probability of connectivity(PC) and the important value of patch connectivity(dI) to reveal the connectivity of land types and importance of patches of cultivated land and construction land.[Results] (1) Compared with cultivated land, the distribution of construction land was strongly influenced by human activities;(2) The connectivity of construction land increased significantly, while the connectivity of cultivated land decreased from 2005 to 2013;(3) The core patch area of cultivated land accounted for 99% of cultivated land area, in contrast, the core patch area of construction land accounted for 79% of construction land area.[Conclusion] Due to the high-connectivity and high utilization efficiency, the core patches of cultivated land need to be well protected. The core patches of construction land need to be well planed and utilized due to its good connectivity and satisfactory geographic location. It is necessary to control expansion of construction land, the emissions of pollutants, and to protect the surrounding cultivated land.

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吴金凤,王秀红,汪然.中国东部沿海地区耕地和建设用地连通性变化——以山东省平度市为例[J].水土保持通报,2015,35(5):251-256,261

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  • 收稿日期:2014-12-08
  • 最后修改日期:2015-02-04
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  • 在线发布日期: 2016-04-05
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