Nutritional information used to obtain the digestible energy and protein in one kilogram of fresh diet.

DM (%) = Dry matter (% of fresh matter); DMDig (%) = Digestible dry matter; GrossE (kcal/g) = Gross energy; EDig (%) = Energy digestibility; PC (%) = Protein content; PDig (%) = Protein digestibility. DMDig, GrossE, EDig, PC and PDig in a dry matter basis. In parenthesis is standard deviation. In brackets is sample size. 1: GrossE for vegetation spring was assumed to be the same than vegetation in summer. 2: Standard deviation estimated as the 10% of average value. 3: Nutritional information for roots in Alberta ecosystems and Flathead was extracted from figure two in Coogan, Nielsen [58]. Values were estimated using data presented in Table 3.