Appendix A. (A) Map of the geographic localities of sites used in this study. Community species richness is denoted by the shading of the site marker, as described in the figure legend. (B) Map of USGS physiographic regions used as regional source pools for co-occurrence analyses (modified from Fenneman and Johnson, 1946).
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(B) |
LITERATURE CITED
Fenneman, N. M., and D. W. Johnson. 1946. Physiographic divisions of the conterminous U.S. USGS Publications. Washington, D.C., USA.