树种空间多样性指数(TSS)的简洁预估方法

A Simple Method for the Estimation of Tree Species Spatial Diversity Index(TSS)

物种多样性是森林生态系统的一个重要特征,其测度方法倍受关注。进一步验证了物种丰富度(S)与树种空间多样性指数(TSS)的相关性。选取6块天然林调查数据,观察不同样地的树种数(S),利用S与TSS关系模型对TSS值进行预测并与实测值对比。结果表明:预测值和实测值之间并无明显差异,二者之间最大相对误差在±0.1之内,平均相对误差在0.014以内,模型的预估精度在92%以上。在具体森林调查中可以简单地通过调查树种丰富度来计算树种多样性指数TSS值。

Species diversity is an important feature of the forest ecosystem,and its measurement has been got much attention.This article further verified the correlation between species richness（S） and tree species spatial diversity index（TSS）.Six natural forest plots were selected in this study.By observing the number of tree species（S） of each plot,the values of TSS were predicted by using a relationship model of S and TSS.No significant differences were found between actual and predicted values of TSS.The maximum relative error of the model was within ±0.1,the mean relative error was less than 0.014,and the predictive accuracy was over 92%.The model can be practically used to calculate TSS values simply by surveying the species richness.