山西霍山植物群落种-面积曲线与物种多样性的关系

Relationships of plant community's species-area curve with species diversity in Huoshan Mountain of Shanxi,China

采用标准样方调查法,对霍山植物群落的物种数、面积和物种多样性之间的关系进行了研究。结果表明:种(对数)-面积(对数)曲线在各海拔处的R2值较种-面积曲线和种-面积(对数)曲线大,中海拔处的平均物种数最多,群落Margalef丰富度指数(R)和Shan-non-Wiener多样性指数(H')也最大,而Jaccard系数(J)最小。各海拔样地物种数的观察值与种-面积曲线和种-面积(对数)曲线在各海拔样地物种数的预测值接近。

By using standard sampling methocl, this paper stuoea me relauonsmps of community＇ s species number, area, and species diversity in Huoshan Mountain of Shanxi Prov ince. In the stands at three different elevations, the adjusted coefficients of determination （R2 values） of species （log） area（log） curves were higher than those of speciesarea curves and spe ciesarea（log） curves. At medium elevation, the mean species number and the Margalef index （R） and ShannonWiener index （H＇） of the community were the largest, but the Jaccard coeffi cient （J） was the smallest. The estimated values of the speciesarea curves and speciesarea （log） curves in the stands at the three different elevations were close to the observed values,