| 农田防护林林网景观结构异质性动态评价 |
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| 作者姓名： | 史晓亮 李颖 赵凯 邓荣鑫 |
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| 作者单位： | 1. 中国科学院东北地理与农业生态研究所, 长春 130012;
2. 中国科学院研究生院, 北京 100049 |
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| 基金项目： | 中国科学院知识创新工程重大项目(KZCXI-YW-08-02)资助 |
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| 摘 要： | 通过计算合理林网与现有林网景观指标值之间的距离系数,利用GIS将其空间化,并通过构建约束准则,实现对农田防护林林网景观结构异质性的综合评价. 利用此方法分析了吉林省中西部地区农田防护林林网景观结构异质性的动态变化. 结果表明,1987—2008年,农田防护林布局合理区域占整个农田景观的面积比例从0.21%增加到20.84%,农田防护林建设效果显著; 但部分地区防护林分布仍存在问题,需要加大防护林的更新建设.
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| 关 键 词： | 农田防护林林网 异质性 空间化 动态变化 |
| 收稿时间： | 2010-09-03 |
| 修稿时间： | 2011-02-11 |
Dynamic evaluation of landscape pattern heterogeneity in farmland shelterbelt networks |
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| Authors: | SHI Xiao-Liang LI Ying ZHAO Kai DENG Rong-Xin |
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| Institution: | 1. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China;
2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | We propose a method for comprehensive evaluation of the spatial heterogeneity in farmland shelterbelt networks. Using this method, we evaluated the dynamic changes in spatial heterogeneity in shelterbelt networks in the midwest of Jilin province from 1987 to 2008. The results show that the regions with rationally distributed shelterbelt networks accounted for 20.84% of the total farmland area in 2008, but the proportion was only 0.21% in 1987. However, the spatial layout of shelterbelts is still unreasonable. Therefore, it is necessary to make strenuous efforts to update and construct the farmland shelterbelts in the studied area. |
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| Keywords: | farmland shelterbelt networks heterogeneity spatialization dynamic changes |
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