. Author manuscript; available in PMC: 2014 Nov 1.

Published in final edited form as: Environ Pollut. 2013 Jul 31;182:127–134. doi: 10.1016/j.envpol.2013.07.011

Table 3.

Calculated multiple-regression model outputs for Hg concentration and amount with significant site characteristics and soil properties from stepwise-regressions for all 17 sites

	Variables	R²	P
Forest floor
Mercury concentration	% SOM, pH and latitude	0.77	< 0.01
Mercury amount	mean annual precipitation, pH and % SOM	0.65	< 0.01
Upper mineral soil horizon
Mercury concentration	Fe concentration	0.35	0.06
Mercury amount	Fe amount	0.21	0.38
Lower mineral soil horizon
Mercury concentration	Latitude, % SOM and Fe concentration	0.80	< 0.01
Mercury amount	Latitude, % SOM and Fe amount	0.73	0.02