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

Table 7

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

Variable	Weight of the variable	Averaged coefficient	Unconditional standard error
PO4	0.922	−28.250	13.310
NO3	0.885	0.251	0.113
Ca	0.650	−0.015	0.010
NO2	0.448	0.168	0.157
NH4	0.422	−4.857	5.898
Zonecont	0.419	−0.660	0.677
Cover	0.339	−0.003	0.004
Mg	0.257	0.004	0.010
pH_mean	0.240	−0.095	0.273
Slope moderate	0.233	0.252	0.269
Slope steep	0.233	0.296	0.319