运用RS与GIS技术,以Landsat TM影像为数据源,基于归一化差值山地植被指数(NDMVI)定量分析了大青山自然保护区植被覆盖度随坡向的分异规律。结果表明保护区的植被覆盖度总体上随坡向呈现明显的分异;大青山保护区植被覆盖度的坡向分异随海拔的升高而越明显。垂直分异规律在不同的坡向上不相同北坡和西北坡在海拔1 400m以上植被覆盖度变化随高度增加而越不明显,1 400m以下则随高度增加而越明显;其它坡向,在1 600~2 000m的海拔高度上,植被覆盖度差异相对更高和更低海拔上的植被覆盖度差异较小;所有坡向在1 200~1 600m的海拔上植被覆盖度差异很小。
This paper analyses the slope-direction of vegetation coverage of Daqing Mount Natural Reserve based on normalized difference mountain vegetation index (NDMVI)by using RS and GIS with the Landsat TM image data.The results show that(1)Obvious differences of coverage on different slope aspects exist in Daqing Mount Natural Reserve;(2)The slope-direction differentiation of vegetation coverage in Daqing Mount Natural Reserve becomes more obvious with increasing altitude and vertical distributions on different slope aspects are not same;(3)On north and northwest slope,the change of vegetation coverage become unapparent over the altitude of 1400m,while it become more apparent below the altitude of 1400m;(4)On the other slopes,the change of vegetation coverage on the altitude of 1600m to 2000m is smaller than it on higher and lower altitude;(5)On all slopes,the difference of vegetation coverage on the altitude of 1200m to 1600m are not very noticeable.
[1]王长科,吕宪国,雷明德.秦岭南坡旬河流域中上游地区植被垂直分异[J].山地学报,2000,18(4):303-305.
[2]娄安如.天山中段山地植被的生态梯度分析及环境解释[J].植物生态学报,1998,22(4):364-372.
[3]李双成,高伟明,周巧富,等.基于小波变换的NDVI与地形因子多尺度空间相关分析[J].生态学报,2006,26(12):4198-4203.
[4]Gallardo-Cruz J A,Perez-Garcia E A,Meave J A.β-Diversity and vegetation structure as influenced by slope aspect and altitude in a seasonally dry tropical landscape[J].Landscape Ecology,2009,24(4):473-482.
[5]Xu X L,Ma K M,Fu B J et al.Relationships between vegetation and soil and topography in a dry warm river valley,SW China[J].Catena,2008,75(2):138-145.
[6]赵一之.贺兰山西坡植被的基本特征及其经济生态意义[J].内蒙古大学学报;自然科学版,1984,15(3):307-314.
[7]刘闯.秦岭南北坡向在土地类型分异中的作用——以陕西秦岭西段为例[J].陕西师大学报,1886(2):66-76.
[8]梁村柱,朱宗元,王炜,等.贺兰山植物群落类型多样性及其空间分异[J].植物生态学报,2004,28(3):361-368.
[9]戴君虎,王红丽,王焕炯,等.六盘山景观格局及与主要气候因子的关系[J].地理研究,2013,32(12):2222-2232.
[10]赵传燕,冯兆东,刘勇.干旱区森林水源涵养生态服务功能研究进展[J].山地学报,2003,21(2):157-161.
[11]聂忆黄.基于地表能量平衡与SCS模型的祁连山水源涵养能力研究[J].地学前缘,2010,17(3):269-275.
[12]李晋鹏,上官铁梁,郭东罡,等.山西吕梁山南段植物群落物种多样性与环境的关系[J].山地学报,2008,26(5):612-619.
[13]代海燕,张秋良,魏强,等.大青山不同植被土壤物理特性及有效水的研究[J].干旱区资源与环境,2008,22(12):149-153.
[14]邵东华,韩瑞宏,宁心哲,等.内蒙古大青山油松 虎榛子根际土壤酶活性研究[J].干旱区资源与环境,2008,22(6):190-193.
[15]田海芬,刘华民,王炜,等.大青山山地植物区系及生物多样性研究[J].干旱区资源与环境,2014,28(8):172-177.
[16]张兆明,何国金,刘定生,等.一种改进的遥感影像地形校正物理模型[J].光谱学与光谱分析,2010,30(7):1839-1842.
[17]Teillet P M,Guindon B,Goodenough D G.On the slope-aspect correction of multispectral scanner data[J].Canadian Journal of Remote Sensing,1982,8(2):1537-1540.
[18]高永年,张万昌.遥感影像地形校正研究进展及其比较试验[J].地理研究,2008,27(2):467-477.
[19]吴志杰,徐涵秋.卫星影像数据构建山地植被指数与应用分析[J].地球信息科学学报,2011,13(5):656-66.
[20]智瑞年,赵雪.阴山山脉大青山山地植被的分布及其利用[J].内蒙古大学学报:自然科学版,1983,14(1):131-134.
[21]朱源,江源,刘全儒,等.基于等面积高度带划分的贺兰山维管植物物种丰富度的海拔分布格局[J].生物多样性,2007,15(4):408-418.
