Occupancy Is Nine-Tenths of the Law: Occupancy Rates Determine the Homogenizing and Differentiating Effects of Exotic Species

@article{Harris2011OccupancyIN,
  title={Occupancy Is Nine-Tenths of the Law: Occupancy Rates Determine the Homogenizing and Differentiating Effects of Exotic Species},
  author={David J Harris and Kevin G Smith and Patrick J. Hanly},
  journal={The American Naturalist},
  year={2011},
  volume={177},
  pages={535 - 543}
}
Biotic homogenization, the loss of local biotic distinctiveness among locations (beta diversity), is a form of global change that can result from the widespread introduction of nonnative species. Here, we model this process using only species’ occupancy rates—the proportion of sites they occupy—without reference to their spatial arrangement. The nonspatial model unifies many empirical results and reliably explains >90% of the variance in species’ effects on beta diversity. It also provides new… 
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