Table 1. Summary of occurrence, pollinator spectra, and their differences for the eight most visited plant species; degrees of freedom and P-values are from the χ²-tests of homogeneity of pollinator assemblages of the given plant species among different meadow sectors.

plant	no. of occupied plots	no. of flowering stalks	no. of recorded pollinators	main pollinator groups	no. of sectors	df	P-value	main difference
Angelica sylvestris	9	100	1281	other Diptera (60%), other Hymenoptera (26%), other (14%)	7	12	<0.001	Varying proportions of other Diptera (29–79%) and other Hymenoptera (13–41%)
Centaurea jacea	62	1707	926	honeybee (63%), bumblebees (28%), other (9%)	2	2	0.005	Two-fold difference in bumblebee proportion (15% to 29%)
Hypericum spp.	41	1732	291	hoverflies (43%), honeybee (42%), bumblebees (4%), other (11%)	2	3	0.028	Change of dominance between hoverflies and honeybee (51% to 35% and 35% to 48% resp)
Ranunculus acris	68	2776	514	hoverflies (52%), true flies (16%), other Diptera (16%), other (16%)	4	9	<0.001	One sector co-dominated by true flies (30%) and hoverflies (32%) instead of hoverflies alone
Sanguisorba officinalis	52	888	526	flesh flies (52%), hoverflies (20%), blowflies (13%), true flies (12%), other(3%)	3	6	0.019	Near-absence of blowflies in the wettest sector, higher dominance of flesh flies there (69%)
Selinum carvifolia	24	285	355	other Diptera (36%), hoverflies (24%), other Hymenoptera (18%), true flies (10%), other (12%)	1	-	-	-
Succisa pratensis	17	203	414	hoverflies (84%), other (16%)	3	2	0.002	Higher proportion of other pollinators in one verge plot (32%)
Trifolium hybridum	66	902*	327	honeybee (60%), bumblebees (31%), other (9%)	2	2	<0.001	Bumblebees increase from 25% in the drier sector to 45% in the wetter one

(* Please note that in the case of T. hybridum, the no. of flowering stalks corresponds to the number of occupied subplots, for details see Materials and Methods and File S1: Tables S1, S2.)