Altitude is a better predictor of the habitat requirements of epixylic bryophytes and lichens than the presence of coarse woody debris in mountain forests: a study in Poland

Table 2 The results of the random forest models

EIV	Statistic	Lichens	Liverworts	Mosses
Cover-weighted mean:
Light	Mean of squared residuals	2.65594	0.2522	0.23332
Light	% Var explained	6.61	24.87	32.44
Temperature	Mean of squared residuals	4.55343	0.3585	0.5550
Temperature	% Var explained	1.63	1.15	8.04
Moisture	Mean of squared residuals	3.8875	0.1657	0.2657
Moisture	% Var explained	6.07	61.62	42.54
Soil reaction	Mean of squared residuals	1.23351	0.0894	0.4216
Soil reaction	% Var explained	3.28	13.26	57.39
Nitrogen	Mean of squared residuals	3.4508	0.6622	0.2561
Nitrogen	% Var explained	11.86	65.3	51.61
Arithmetic:
Light	Mean of squared residuals	2.5082	0.2492	0.1788
Light	% Var explained	7.32	20.99	26.34
Temperature	Mean of squared residuals	4.58016	0.3622	0.2843
Temperature	% Var explained	2.26	1.17	1.74
Moisture	Mean of squared residuals	3.87035	0.1671	0.1947
Moisture	% Var explained	5.34	62.31	29.94
Soil reaction	Mean of squared residuals	1.1727	0.0824	0.3569
Soil reaction	% Var explained	1.22	15.64	57.55
Nitrogen	Mean of squared residuals	3.4551	0.6735	0.2133
Nitrogen	% Var explained	10.45	63.69	44.72

Explanations: EIV Ellenberg indicator value, L light, T temperature, F moisture, R acidity, N nitrogen, cwm cover-weighted mean, binary arithmetic mean

ISSN: 1297-966X