. Author manuscript; available in PMC: 2018 Dec 1.

Published in final edited form as: Ecol Appl. 2017 Nov 3;27(8):2397–2415. doi: 10.1002/eap.1617

Table 3.

Coefficients of determination (r-squared) between predicted probability of good condition and the percent of each watershed composed of urbanization, agriculture, and the index of watershed integrity (Thornbrugh et al. in review). National Aquatic Resource Surveys (NARS) region abbreviations: CPL = Coastal Plains; NAP = Northern Appalachians; NPL = Northern Plains; SAP = Southern Appalachians; SPL = Southern Plains; TPL = Temperate Plains; UMW = Upper Midwest; WMT = Western Mountains; XER = Xeric.

NARS Region	Coefficient of determination (r²)
NARS Region	Urb	Ag	IWI
CPL	0.09	0.13	0.14
NAP	0.24	0.16	0.44
NPL	0.00	0.10	0.09
SAP	0.19	0.07	0.26
SPL	0.04	0.08	0.09
TPL	0.03	0.01	0.04
UMW	0.10	0.24	0.27
WMT	0.09	0.11	0.27
XER	0.05	0.06	0.13