| 荆玉平,张树文,李颖.奈曼旗生态脆弱性及空间分异特征[J].干旱地区农业研究,2008,(2):159~164 |
| 奈曼旗生态脆弱性及空间分异特征 |
| Environmental vulnerability and spatial difference characteristics in Naiman Banner |
| |
| DOI：10.7606/j.issn.1000-7601.2008.02.32 |
| 中文关键词: 奈曼旗 土地利用变化 景观格局 生态脆弱性 空间变异 |
| 英文关键词:Naiman Banner LUCC land pattern ecological vulnerability spatial variation |
| 基金项目:中国科学院知识创新工程重要方向项目(KZCX2—SW—320—1) |
|
| 摘要点击次数: 418 |
| 全文下载次数: 361 |
| 中文摘要: |
| 在遥感技术与GIS技术支持下,以内蒙古自治区奈曼旗近25 a来的土地利用变化为例,根据其景观结构及土地利用结构特征,构造综合性生态脆弱性指数;利用空间分析方法对生态脆弱性指数进行空间化,对生态脆弱性指数进行空间插值和半变异函数分析,绘制奈曼旗不同时期生态脆弱性分布图,分析解释奈曼旗生态脆弱性分布特征及变化机理。结果表明,19762000年间,奈曼旗处于较高的生态脆弱性状态,平均脆弱性指数由1976年的0.7445增加至2000年的0.7803,奈曼旗南部及西北部区域较低,大沁他拉镇至六号农场之间111国道及教来河两侧生态脆弱性较高。不同农业生产类型区的平均脆弱性顺序为半农半牧区>牧区>农区,农区的脆弱性相对稳定,半农半牧区的生态脆弱性变化较大,半农半牧区的中度脆弱区比例降低,而重度脆弱区的比例明显升高。要根据不同的土地利用覆被特点及农业生产类型制定不同的生态措施。 |
| 英文摘要: |
| Taking Naiman Banner in Inner Mongolia as an example,synthetical ecological vulnerability index was built with the theory of landscape structure and the feature of land-use/land-cover based on GIS and RS technology,semivariogram analysis and block Kriging interpolation method were conducted to gain the distribution map of ecological vulnerability,and spatial characteristics and change mechanism of ecological vulnerability was analyzed.The results show that the status of ecological vulnerability is very serious in Naiman Banner,the average of ecological vulnerability index increased from 0.7445 to 0.7803 between 1976～2000.EVI is lower in south and north-west Naiman Banner,while both sides of state road No.111 and Jiaolai River between Daqintala town and No.6 farm is higher.The average EVI sequence of different agricultural production mode is farming-pastoral>pastoral>farming.Change of farming EVI shows stability while the other two agricultural production modes change obviously,moderate vulnerability area of farming-pastoral region decrease while serious vulnerability area increase obviously.So different ecological preservation policies should be adopted according to different land use/cover type and different agricultural production modes. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |