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

Table 2

Results of the tb-RDA analysis.

Dataset	Percentage of variation explained by the variables (constrained variation)	Percentage explained by first axis inside constrained variation	Percentage explained by second axis inside constrained variation
With outliers and orientation variable	36.5	44.9	18.1
Without outliers and with orientation variable	38.3	42.8	15.4
With outliers and without orientation variable	28.3	55.9	17.7