Factors Affecting the Presence and the Diversity of Bryophytes in the Petrifying Sources Habitat (7220) in Wallonia and the Brussels-Capital Region, Belgium

Table 6

Results of the AIC stepwise model selection for probability of presence of Cratoneuron filicinum showing the best significant variables selected based on their weight using the complete dataset.

Variable	Weight of the variable	Averaged coefficient	Unconditional standard error
Mg	0.986	0.127	0.049
NH4	0.734	−21.408	17.105
PO4	0.339	−2.269	3.217
Ca	0.324	−0.003	0.004
Cover	0.322	−0.002	0.003
pH_mean	0.261	−0.110	0.227
Zonecont	0.257	−0.019	0.231
NO2	0.239	0.012	0.049
NO3	0.238	0.005	0.022
Slope moderate	0.135	0.09	0.133
Slope steep	0.135	−0.018	0.121