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| 松嫩平原草地时空动态与景观空间格局变化研究 | |
| 引用本文： | 李建平,赵江洪,张柏.松嫩平原草地时空动态与景观空间格局变化研究[J].中国草地学报,2006,28(2):7-12. |
| 作者姓名： | 李建平 赵江洪 张柏 |
| 作者单位： | 1. 中国科学院东北地理与农业生态研究所,吉林,长春,130012;中国科学院研究生院,北京,100039 2. 北京建筑工程学院,北京,100044 3. 中国科学院东北地理与农业生态研究所,吉林,长春,130012 |
| 摘 要： | 利用1986、1995、2000年三期遥感影像，基于RS与GIS技术，解译提取松嫩平原草地空间信息并分析了其时空动态和景观格局变化。结果表明：14年来，草地面积减少25．60％，草地退化严重；草地斑块数减少18．38％，破碎化程度加剧，斑块形状变化不大且较为简单；1986-1995年低覆盖度草地发展速度最快，1995～2000年高覆盖度草地减少迅速，对该区草地资源减少率的贡献较大；草地主要转化为耕地和盐碱地，转移面积分别达到了1116219．53hm^2和313708．75hm^2；14年来，各种类型草地的质心向东北方向偏移，不同阶段各类型草地质心偏移表现出无规律性、多向性。研究区草地退化是自然因素与人为因素共同作用的结果，自然因素是草地退化形成的基本条件，人类活动干扰则是决定因素。 |
| 关 键 词： | 松嫩平原 草地 景观格局 动态变化 |
| 文章编号： | 1673-5021（2006）02-0007-06 |
| 收稿时间： | 2005-10-08 |
| 修稿时间： | 2005-10-082005-11-28 |
Research on Spatial-temporal Dynamics and Landscape Pattern Change of Grassland in Songnen Plain |
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| LI Jian-ping,ZHAO Jiang-hong,ZHANG Bai.Research on Spatial-temporal Dynamics and Landscape Pattern Change of Grassland in Songnen Plain[J].Chinese Journal of Grassland,2006,28(2):7-12. | |
| Authors: | LI Jian-ping ZHAO Jiang-hong ZHANG Bai |
| Institution: | 1. Northeast Institute of Geography and Agriculture Ecology ,C A S ,Changchun 130012,China; 2. Beijing Institute of Civil Engineering and 3. Graduate School of the Chinese Academy Architecture ,Beijing 100044,China of Sciences ,Beijing 100039, China |
| Abstract: | Grassland had heavily degraded in Songnen Plain,and it is important to maintain balance of ecosystem by studying on spatial-temporal dynamics and change of landscape pattern of grassland.Based on RS and GIS technique,three-period(1986,1995,2000) remote sensing images were interpreted to extract spatial information of grassland landscape in the region,and spatial-temporal dynamics of grassland and change of landscape pattern were analyzed.The results showed that grassland area decreased by 25.6%,grassland degradation is serious.Patch number of grassland decreased by 18.38%,and degree of fragmentation is enhanced,patch shape changed little.During 1986~1995,low coverage grassland rapidly developed,and high coverage grassland fast declined during 1995~2000,and it actively contributes to decrease of grassland.Grassland is mainly converted into cropland and saline-alkalized land,conversion area reaches 1116219.53hm~2 and 313708.75hm~2,respectively.From 1986 to 2000,centroids of various grasslands moved towards northeast direction,and in different stages,centroids change of each kind of grassland are irregular and multi-directional.Both natural factors and human activities result in grassland degradation in the studying region,natural factors are basic condition of grassland degradation,and human activities are crucial factors. |
| Keywords: | Songnen plain Grassland Landscape pattern Dynamic change |
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