Supplement 1. R code used to calculate percent error of estimated richness in the full data set using subsets of plots of each habitat type to calculate shared species overlap among habitat types.

File List
MS11-0206.Rcode.R (md5: e99ae92c8e95f222b82883641b96cf0d)
Description
R code used to calculate percent error of estimated richness in a full data set using subsets of plots from each habitat type to calculate shared species overlap among habitat types. Input data should be a plot by species matrix with an additional column denoting the habitat type of each of plot. In this study, the habitat types were A (arable fields), G (grasslands), P (pastures), and W (woodlots or forests). Two, three, and four way overlap terms were calculated separately using Eqs. 2 and 3, and were combined together as in Eq. 1 to estimate richness in the full data set.

文件列表
MS11-0206.Rcode.R (md5: e99ae92c8e95f222b82883641b96cf0d)
描述
本R代码用于基于各生境类型的样方子集，计算完整数据集内估计物种丰富度的百分比误差，并量化不同生境类型间的共有物种重叠度。输入数据应为样方-物种矩阵，并额外附带一列标注每个样方所属的生境类型。本研究涉及的生境类型包括A（耕地，arable fields）、G（草原，grasslands）、P（牧场，pastures）以及W（林地/森林，woodlots or forests）。分别通过公式2与公式3计算二元、三元及四元物种重叠项，并参照公式1将其整合，以估算完整数据集的物种丰富度。