Table 1.

Bacterial and plant indicators across the Alpine grassland vegetation alliances.

Alliancea	Habitat category	Habitat subcategory	No of Sites	No of indicator bacterial OTUs	No of indicator plant species
Arabidion caerulae	Grasslands and prairies	Snowy combe of limestone	1	39	5
Caricion ferruginae	Grasslands and prairies	Unimproved calcareous grassland	1	32	8
Petasition paradoxi	Glaciers, rocks, screes and moraines	Wet limestone scree	1	27	4
Arrhenatherion	Grasslands and prairies	Low altitude hayfield	4	0	1
Cynosurion	Grasslands and prairies	Low and mid-altitude pastureland	27	0	0
Mesobromion	Grasslands and prairies	Semi-dry medio-European grassland	9	0	2
Poion alpinae	Grasslands and prairies	Alpine and subalpine fertile pastureland	4	0	2
Calthion	Shores and humid zones	Buttercup prairie	4	43	6
Caricion firmae	Grasslands and prairies	Dry limestone lawn of firm sedges	3	5	0
Elynion	Grasslands and prairies	Lawn on windy ridges	3	4	1
Nardion	Grasslands and prairies	Sparse and acidic pastureland	17	17	1
Polygono Trisetion	Grasslands and prairies	Mountain hayfield	5	6	1
Rumicion alpini	Pioneer vegetation in anthropogenically disturbed areas	Alpine and subalpine cattle resting areas	2	10	1
Seslerion	Grasslands and prairies	Dry limestone lawn of seslerie	2	4	3
Thlaspion rotundifolii	Glaciers, rocks, screes and moraines	High altitude calcareous scree	17	37	2

^aAlliance information according to Delarze & Gonseth (2008).