Spatial patterns and temporal trends of trace elements in mosses from 1990 to 2020 in Germany

Environmental Sciences Europe

Table 6 Changes in the median values of the metal concentrations to the previous campaign and to the previous–previous campaign [in %]

Element	1995/1990	2000/1995	2005/2000	2015/2005	2020/2015	1995/B. year	2000/B. year	2005/B. year	2015/B. year	2020/B. year
As	− 26***	− 36***	0	− 32***	10	− 26**	− 53***	− 53***	− 68***	− 65***
Cd	2	− 28***	0	− 35***	55***	2	− 27***	− 27***	− 53***	− 27***
Cu	8***	− 24***	2**	− 36***	26***	8**	− 19***	− 17***	− 47***	− 33***
Ni	− 31***	− 31***	3	− 41***	165***	− 31**	− 52***	− 51***	− 71***	− 23***
Pb	− 40***	− 41***	− 20***	− 50***	2	− 40**	− 64***	− 71***	− 86***	− 86***
Sb	n.a	− 13***	7**	− 44***	64***	n.a	− 13***	− 8***	− 48***	− 14**

B. year base year (year of first sampling), n.a. not specified, − decrease in median
***p ≤ 0.01 (very significant)
**p ≤ 0.05 (significant)