Plant species richness data collected at the Savannah River Site near Aiken, SC, USA. Data were collected in 8 experimental blocks; with five patches in each block. Data were collected annually from 2001-2014. Details of experimental design found in Damschen, E. I., N. M. Haddad, J. L. Orrock, J. J. Tewksbury, and D. J. Levey. 2006. Corridors increase plant species richness at large scales. Science 313:1284-1286.