Table 3. Results of linear mixed effects models of the influence of ecological provinces on frequency of tunnel-nests.

Species presented are a subset of all species collected representing those collected from more than 10% of nest blocks, representing species in the genera Heriades, Osmia, and Megachile. Significant results are indicated in bold. Means and standard errors are calculated from the raw data. Post hoc tests are the results of estimated marginal means comparisons.

	Mean nest frequency per block +/- s.e.						Post hoc tests
species	EBF	PP	LMF	X 2	df	p-value	direction	p-value
H. carinata	1.02 ± 0.12	1.34 ± 0.21	0.52 ± 0.20	6.05	2	<0.05	EBF = PP	0.2439
	EBF > LMF	0.0352
	PP > LMF	0.0152
O. lignaria	1.13 ± 0.23	0.5 ± 0.25	2.9 ± 0.70	9.22	2	<0.01	EBF >PP	0.0447
			EBF = LMF	0.1113
			LMF > PP	0.0027
O. pumila	0.79 ± 0.12	0.01 ± 0.01	NA	6.03	1	<0.01	EBF > PP	0.0001
O. tersula	0.04 ± 0.02	0.06 ± 0.03	0.90 ± 0.20	52.84	2	<0.01	EBF = PP	0.7153
			LMF > EBF	<.0001
			LMF > PP	<.0001
M. campanulae	0.42 ± 0.05	0.38 ± 0.12	NA	0.40	2	1	EBF = PP	0.53
M. pugnata	0.37 ± 0.08	0.72 ± 0.19	0.12 ± 0.06	8.66	2	<0.05	EBF = PP	0.1205
			EBF > LMF	0.0475
			PP > LMF	0.0043
M. relativa	0.27 ± 0.09	0.13 ± 0.05	0.91 ± 0.30	9.26	2	<0.001	EBF = PP	0.3295
			LMF > EBF	0.0126
			LMF > PP	0.0047
Overall nesting	4.2 ± 1.2	3.6 ± 1.4	4.9 ± 1.5	2.27	2	0.3216	EBF = PP	0.3008
			EBF = LMF	0.4346
			LMF = PP	0.1380

Notes.

EBF

Eastern Broadleaf Forest

PP

Prairie Parklands

LMF

Laurentian Mixed Forest