北戴河新区耕地景观生态安全时空变化研究

发布时间：2018-06-10 05:38

本文选题：耕地 + 景观生态安全指数　；参考：《中国农业资源与区划》2017年03期

【摘要】：[目的]分析北戴河新区耕地景观生态安全,试图找出其格局变化规律和变化原因,以期为北戴河新区制定耕地保护对策提供借鉴。[方法]文章选取景观指数建立耕地景观生态安全评价模型,分析北戴河新区1991年、2001年及2013年的耕地景观生态安全时空变化特征,在此基础上,分析了耕地景观生态安全重心变动轨迹,进一步分析耕地景观生态安全的时空变化规律。[结果]研究表明:1991~2013年间,1991年为0.647 6,2001年为0.593 9,2013年为0.527 6;其逐年下降原因主要是人类活动加剧导致耕地景观连通性下降,耕地景观生态安全程度分布不均衡,各安全指数级别出现相互转化的现象;耕地景观生态安全重心总体呈现向东北部移动的变化规律,1991~2001年移动距离为4.06km,2001~2013年动距离为1.43km。[结论](1)北戴河新区耕地景观生态安全指数从1991~2013年持续下降且下降幅度不断增大,耕地景观生态安全受到威胁;(2)北戴河新区的耕地景观生态安全空间分布不均衡,安全程度不稳定;(3)利用景观格局分析耕地安全的研究方法可行。
[Abstract]:[objective] to analyze the ecological security of cultivated land landscape in Beidaihe New area, and try to find out its pattern change law and reasons, in order to provide reference for the establishment of cultivated land protection countermeasures in Beidaihe New area. [methods] the evaluation model of cultivated land landscape ecological security was established with landscape index, and the temporal and spatial changes of cultivated land landscape ecological security in 1991, 2001 and 2013 in Beidaihe New area were analyzed. The changing trajectory of the center of gravity of cultivated land landscape ecological security was analyzed, and the temporal and spatial variation law of cultivated land landscape ecological security was further analyzed. [results] the results showed that in 1991, it was 0.647 6 in 1991, 0.593 9 in 2001 and 0.527 6 in 2013. The main reasons for the decrease were the decrease of the connectivity of cultivated land landscape caused by the intensification of human activities, and the uneven distribution of ecological security degree of cultivated land landscape. The change of ecological security center of cultivated land landscape showed the law of moving to the northeast. The moving distance from 1991 to 2001 was 4.06 kmg from 2001 to 2013, and the moving distance was 1.43 km in 2001 ~ 2013. [conclusion] the ecological security index of cultivated land landscape in Beidaihe New area decreased continuously from 1991 to 2013, and the ecological security of cultivated land landscape was threatened. 2) the spatial distribution of cultivated land landscape ecological security in Beidaihe New area was not balanced. The research method of using landscape pattern to analyze cultivated land security is feasible.
【作者单位】：内江师范学院地理与资源科学学院;
【基金】：内江师范学院校级课题“小城镇基准地价土地用途细化分类研究——以内江市为例”(NO.14SB01) 国家级大学生创新实验项目“基于磁性示踪法的川中丘陵区紫色土坡面侵蚀过程研究”(No.X201306)资助
【分类号】：F323.211;P901

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