摘要
本文采用方差/均值法,Greig-Smith格局分析法及Hill格局分析法,探讨了科尔沁沙地盐生草甸主要植物群落种群格局及其成因。结果表明,羊草群落和野古草群落中的大部分种为聚集分布,羊草与野古草群落交错区中所有种为聚集分布,其最小面积为0.01m^2,最大面积为6.4×6.4m^2。邻接格子最小取样面积应小于0.05×0.05m^2,最适取样面积为40.96m^2,小规模格局是种子扩散和营养繁殖的结果,中规模起因于匍匐和长根茎的扩散,大规模则取决于土壤总盐分及pH值。
The population patterns of main communities on halomorphic meadow of Keerqin sandyland and their formations are studied with methods of variance/mean, Greig-Smith's variance analysis for nested quadrats and Hill's pattern analysis. The results show that most of the species in Aneurolepidium ehinense and Arundinella hirta communities and all species in ecotone of these two communities are appeared as aggregated distribution. Its smallest scale is 0.01m^2, and the biggest is 6.4×6.4m^2. The minimum sampling size of grid should be less than 0.05×0.05m^2, and the optimal sampling size is 40.96m^2. The small scale pattern is caused by seed dispersion and nutrient reproduction, the middie scale one is caused by extension of stolon and long rhizome,and the large scale pattern is determined by total salt content of soil and soil pH.
出处
《应用生态学报》
CAS
CSCD
1992年第4期313-320,共8页
Chinese Journal of Applied Ecology
关键词
盐生草甸
植物群落
种群分布格局
Population, Aggregated distribution, Poisson distribution.
