Multi-species habitat models highlight the key importance of flooded reedbeds for inland wetland birds: implications for management and conservation

Table 2 Results of MARS models exploring which habitat types predict the occurrence probability of reedbed species at the point count scale (n = 75)

Type of model	Species	Selected variables	No. of subsets	GCV	RSS	R ²	Points of occurrence (total no. of points = 75)
Multiresponse		Reedbed	2	100	100
		Open water	1	35.4	56.8
	Water Rail					0.1	32
	Great Reed Warbler					0.1	51
	Eurasian Reed Warbler					0.3	51
	Marsh Warbler					0.2	25
Specific	Water Rail	Reedbed	1	100	100	0.1	32
Specific	Great Reed Warbler	Bushes	2	100	100	0.2	51
		Magnocarex	1	40.2	55.6
		Flooding status of the reedbed	1	40.2	55.6
Specific	Eurasian Reed Warbler	Reedbed	2	100	100	0.3	51
		Open water	1	65	65.5
Specific	Marsh Warbler	Reedbed	3	100	100	0.3	25
		Other types of vegetation	2	37	62.5
		Terrain	1	11.5	40.8

The results of both multi-response and species-specific models are presented. No. of subsets: number of models generated by the pruning pass, which include a given variable; GCV: generalized cross-validation; RSS: decrease in the residual sum-of-square; R²: model’s R square. Points of occurrence: number of points in which the species was detected, out of the 75 total points surveyed in the study

ISSN: 2053-7166