【摘要】 应用梯度格局法在长白山北坡海拔700-2600 m 之间,海拔每上升100 m设置一块样地,共20块样地。以具体的样地观测数据为基础,应用刀切法和自助法等非参数估计法对各海拔群落的物种丰富度进行了估计,结果表明,用自助法所得到的物种估计数,与客观实际更为接近。同时,根据各海拔群落观测物种数与估计物种数的差异,进一步验证了最小取样面积的合理性。表4参12。更多还原

【Abstract】 By the method of gradient pattern analysis, 24 plots were set at altitudes 700-2600 m with an interval of 100 m on the northern slope of Changbai Mountains. Two non-parametric estimating methods, jackknife and bootstrap, were used to estimate the numbers of species in the communities at different altitudes. Results showed that the estimated numbers of species from bootstrap were more close to the reality. By comparing the difference between estimated number of species and the number of observed species, rationality of critical sampling area for different communities were validated.更多还原