Table 10.

Spearman rank correlations between the independent explanatory variables (n = 155)

Independent Variables	Stream density	Wetland to stream distance	Lake abund.	Lake areal abund.	Max surface-water extent	Change in surface-water extent	Wetland to wetland distance	Total wetland density	Wetland areal abund.	Percent drained	Elevation coeffic. of var.	Melton ruggedness number
Stream density	1	−0.88*	−0.67*	−0.35*	−0.69*	−0.74*	0.62*	−0.54*	−0.65*	0.19	0.50*	0.44*
Wetland to stream distance	−0.88*	1	0.65*	0.29*	0.70*	0.78*	−0.76*	0.70*	0.71*	−0.29*	−0.24	−0.34*
Lake abundance	−0.67*	0.65*	1	0.55*	0.77*	0.77*	−0.57*	0.46*	0.83*	−0.18	−0.27	−0.24
Lake areal abundance	−0.35	0.29	0.55*	1	0.62*	0.42*	−0.14	−0.03	0.66*	0.00	−0.23	−0.38*
Max surface-water extent	−0.69*	0.70*	0.77*	0.62*	1	0.91*	−0.50*	0.37*	0.88*	−0.07	−0.30*	−0.45*
Change in surface-water extent	−0.74*	0.78*	0.77*	0.42*	0.91*	1	−0.67*	0.60*	0.80*	−0.23	−0.31*	−0.41*
Wetland to wetland distance	0.62*	−0.76*	−0.57*	−0.14	−0.50*	−0.67*	1	−0.95*	−0.66*	0.48*	−0.01	0.04
Total wetland density	−0.54*	0.70*	0.46*	−0.03	0.37*	0.60*	−0.95*	1	0.52*	−0.57*	0.05	0.04
Wetland areal abundance	−0.65*	0.71*	0.83*	0.66*	0.88*	0.80*	−0.66*	0.52*	1	−0.29*	−0.16	−0.29*
Percent drained	0.19	−0.29*	−0.18	0.00	−0.07	−0.23	0.48*	−0.57*	−0.29*	1	−0.12	−0.15
Elevation coeffic. of var.	0.50*	−0.24	−0.27	−0.23	−0.30*	−0.31*	−0.01	0.05	−0.16	−0.12	1	0.69*
Melton ruggedness number	0.44*	−0.34*	−0.24	−0.38*	−0.45*	−0.41*	0.04	0.04	−0.29*	−0.15	0.69*	1

Significant correlations are determined using the Bonferroni correction and are marked with asterisks