Spatial patterns and temporal trends of heavy metal concentrations in moss and surface soil specimens collected in Norway between 1990 and 2010

Environmental Sciences Europe

Table 3 Spearman correlations between measured Cd, Hg and Pb concentrations in moss and soil samples, Norway

	Number	Cd	Pb	Hg
Moss 1990 - soil 1995	211	0.59	0.87
Moss 1995 - soil 1995	456	0.65	0.84
Moss 2000 - soil 1995	463	0.57	0.78
Moss 2000 - soil 2005	219	0.50	0.73	0.29
Moss 2005 - soil 2005	364	0.56	0.76	0.36
Moss 2010 - soil 2005	462	0.56	0.72	0.11

The correlations between the measured HM concentrations in moss samples collected in 1990 with the measured HM concentrations in soil specimen sampled in 1995 included only those soil sampling sites with a spatial distance of 2 km at maximum. The sampling sites for moss and soil were identical in 1995 as well as in 2005. The italicized values denote p <0.01.