Code to automate obtaining and processing species occurrence data from https://bison.usgs.gov/ in R, which includes data from GBIF, universities,NGO's, state and federal agencies. Save time by downloading data for multiple taxa using the BISON_data_Download.R script. Use the ProcessingUSGS_BISON_data.R to clean the downloaded data and keep only the attributes you want.
The slopeofSAC.R script is a helper function to derive the last 10% of the slope of species accumulation curves obtained using the vegan package.