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Fig. 7. Change in mass of Sphagnum fuscum litter in litter bag after one and two years of decomposition at four sites in Canada. Litter bags were incubated in the original habitat of S. fuscum. The mass remaining at Year 0 means initial annual production of S. fuscum. British Columbia (54°13' N, 130°10' W), this study; Alberta (54°41' N, 113°28' W), Szumigalski and Bayley (1997) and Thormann and Bayley (1997b); Manitoba (49°53' N, 95°54' W), Reader and Stewart (1971)(1972); Ontario (49°40' N, 93°43' W): Rochefort et al. (1990). Highest value of the initial annual production in British Columbia includes the estimate of winter growth, and the lowest value shows the production from May to November. Initial annual NPP in Manitoba includes weight of capitula (Reader and Stewart, 1971).
