| 农牧交错带土地荒漠化动态景观格局分析——以靖边县杨桥畔镇为例 |
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| 引用本文： | 屈佳,常庆瑞,王耀宗.农牧交错带土地荒漠化动态景观格局分析——以靖边县杨桥畔镇为例[J].西北林学院学报,2011,26(1):166-170. |
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| 作者姓名： | 屈佳 常庆瑞 王耀宗 |
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| 作者单位： | 1. 西北农林科技大学,资源环境学院,陕西,杨陵,712100;中国地震局第二监测中心,陕西,西安,710054
2. 西北农林科技大学,资源环境学院,陕西,杨陵,712100 |
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| 基金项目： | 国家自然科学基金项目(30872073,30571527); 国家“十一五”科技支撑计划项目(2006BAD09B0603) |
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| 摘 要： | 以20世纪80年代航片、90年代SPOT和2007年ALOS遥感图像为主要数据源,利用景观生态学方法定量分析小尺度区域20世纪80年代初期至2007年间土地荒漠化及其变化状况。结果表明:(1)研究时段内,研究区土地荒漠化面积呈先增后减趋势,总荒漠化面积减少1 246.5hm2,中度和轻度荒漠化土地面积分别增加2 247.1 hm2和1 236.1 hm2,严重荒漠化土地面积减少4 729.7 hm2,荒漠化主导类型由严重荒漠化转变为中度荒漠化,荒漠化程度有所减轻;(2)区域景观多样性和均匀性指数上升,轻度、中度荒漠化景观的边缘密度越来越高,边缘效应逐渐增大;(3)各荒漠化景观斑块数量呈增加趋势,斑块平均面积指数减小,景观破碎化程度明显增高,景观类型呈离散型分布;(4)研究区严重荒漠化景观形状趋于简单,轻度、中度荒漠化土地景观形状指数变得越来越低,斑块形状趋于复杂,易受周边景观和人类活动的影响。
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| 关 键 词： | 土地荒漠化 动态变化 景观指数 |
Dynamic Changes of Landscape Pattern during Desertification in Agriculture and Pasturage Interlaced Zone-A Case Study in Yangqiaopan Township |
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| QU Jia,CHANG Qing-rui,WANG Yao-zong.Dynamic Changes of Landscape Pattern during Desertification in Agriculture and Pasturage Interlaced Zone-A Case Study in Yangqiaopan Township[J].Journal of Northwest Forestry University,2011,26(1):166-170. |
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| Authors: | QU Jia CHANG Qing-rui WANG Yao-zong |
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| Institution: | QU Jia1,2,CHANG Qing-rui1,WANG Yao-zong1(1.College of Resources and Environment,Northwest A&F University,Yangling,Shaanxi 712100,China,2.Second Crust Monitoring and Application Center,CEA,Xi'an,Shaanxi 710054,China) |
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| Abstract: | By using the interpretation results of remote sensing images of 1980s(aerial photo),1990s(spot),and 2007(alos),the dynamic changes of landscape pattern during the desertification in Yangqiaopan Township during 1980s-2007.The results showed that the desertification area appeared a tendency of increasing first and then decreasing,during the study period.The number of desertification patches congregated and expanded,while the landscape of sandy desertification was becoming more fragmented.Fortunately,the degre... |
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| Keywords: | landscape pattern dynamic change landscape index |
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