摘要
通过对小流域不同坡面上鱼鳞坑的内外群落植被调查,研究了该地区鱼鳞坑内外植被群落特征与海拔及坡向的关系。(1)阴坡鱼鳞坑内的盖度大于阳坡鱼鳞坑内的盖度,并且达到极显著水平。(2)坡向不是控制该区域植被群落多样性的主导因子。(3)不同土地类型鱼鳞坑外的群落丰富度指数,Shannon- Wiener指数及同一土地类型的鱼鳞坑内外群落的指数均与海拔高度成极显著的抛物线函数关系,但是与鱼鳞坑内群落的多样性指数不成显著相关关系。结果显示,可以通过像鱼鳞坑这样的整地方式来改变小生境以促进群落植被的物种多样性。
Based on vegetation communities inside and outside fish-scalepits on the different slopes of small watershed, the relationships between vegetation communities inside and outside fish-scale pits and latitude as well as slope aspect are discussed. The results drawn from this case study are as follows： （1） The coverage of the vegetation community inside fish-scale pits on northern slope is higher than that on southern slope, reaching a very significant level. （2） Slope aspect is not the dominant factor in determining the diversity of the vegetation communities. （3） The relationships between altitude and the vegetation community richness outside fish-scale pits with different land uses, Shannon--Wiener indexes, and indexes for the vegetation communities inside and outside fish-scale pits with the same land use pattern can be described by parabolic functions, reaching a remarkably significant level. However, the relationship between altitude and diversity indexes of vegetation communities inside fish-scale pits does not reach a significant level. The results imply that community diversity can be increased by methods of changing niche, such as fish-scale pit preparation.
出处
《水土保持通报》
CSCD
北大核心
2007年第6期80-84,共5页
Bulletin of Soil and Water Conservation
基金
21世纪首都水资源可持续发展科技支撑项目
关键词
土石山区
鱼鳞坑
物种多样性
海拔
坡向
earth-rock mountain region
fish-scale pit
species diversity
altitude
slope aspect
