摘要
基于1994年岷江上游TM遥感影像分类,结合海拔、坡度和坡向等地形因子及降雨、温度和土壤等气候环境因子,用“3S”技术对岷江上游植被格局及其与环境之间的关系进行分析.结果表明:岷江上游森林、草地和灌丛分布面积比例差异不大,其中针叶林和混交林斑块形状复杂,斑块破碎化程度较高.阔叶林和农田斑块形状简单,斑块破碎度化程度较低;郁闭灌丛和草地的斑块聚集度高,景观连通性较好,混交林斑块聚集度低,景观连通性差;岷江上游植被分布及生长与海拔、温度相关性较高,与降雨无明显的相关性.
Using geographic information system（GIS）, remote system（RS） and giooai positioning system （GPS）; based on Landsat 5 Thematic Mapper （TM） satellite images acquired on June 26, 1994; and factors such as altitude, temperature, precipitation and soil type, the relationship between the vegetation pattern and environment is illuminated . The results are as follows. The dominant vegetation types are grasslands, shrublands and forests in the Mingjiang valley, with the proportions of 32. 27%, 31. 85% and 28. 44%, respectively. The patches shape of the conifer and mix forestry is complex and vegetation fragment is severe. The patches aggregation and landscape connectivity of the closed shrub and grassland are higher. Vegetation spatial pattern is influenced by altitude, slope, soil and temperature. Vegetation growth is highly correlated with altitude and temperature while precipitation had less effect.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第4期404-409,共6页
Journal of Beijing Normal University(Natural Science)
基金
国家重点基础研究发展计划资助项目(2002CB111504)
国家杰出青年基金资助项目(30125036)
国家自然科学基金资助项目(30471383)
国家林业局森林生态环境重点实验室基金资助项目
关键词
岷江上游
植被格局
环境因子
“3S”技术
upstream of the Minjiang River
vegetation pattern
environment factor
“3S” technic
