Sheffield et al. 



JESO Volume 139, 2008 



FIGURE 2. Main effects plot of mean proportional survival (± s.e.) for Osmia lignaria 

 wintered inside versus outside (left graph), and from Utah versus Nova Scotia (right graph). 



I I Nova Scotia \" ' 1 Utah 



-25 00 1 1 1 1 1 



W-ln W-Out S-ln S-Out 



Season / Wintering Site 



FIGURE 3. Mean supercooling points (°C ± s.e.) of Nova Scotia and Utah populations 

 of Osmia lignaria wintered in environmental chambers (IN) and outside in a screened 

 building (OUT) in the winter (W) and late winter/early spring (S). Bars sharing letters are 

 not significantly different (ANOVA of ranked data with Tukey's HSD test; p = 0.05). 



8 



