TABLE 2.

Global ANOSIM statistics for tests involving patchiness at four spatial scales^a

Scale	Sample statistic R	No. of Monte Carlo permutations with scores ≥ Rb	P value
Stations (nested in basins)	−0.13	999	1.000
Basins (nested in lakes)	0.231	0	0.001
Lakes (with basins nested)	1.0	0	0.001
Regions (with lakes nested)	−0.066	693	0.694

^aThe magnitude of R represents the degree of separation between groups defined at the indicated scale (see Materials and Methods).

^bOut of 999.