Fig. 2
From: The effects of forest type on soil microbial activity in Changbai Mountain, Northeast China
Ratio of soil cumulative mineralized carbon to potentially mineralizable carbon (C m /C 0 ) (a) and mean respiration rate (b) after 57 days incubation for four forest types in the Changbai Mountain region of Northeast China. Carbon mineralization modeling is based on C m  = C 0 (1-e-kt), where C m and C 0 are cumulative amount of carbon mineralization within the incubation period and potential mineralized carbon, respectively; k is the mineralization constant and t is time period (days). Vertical bars show the standard deviation of the mean (n = 4). Old-growth forest is a primary mixed forest with broadleaf and Korean pine; birch forest is regenerated by natural succession; mixed broadleaf/larch forest is a mixed forest with natural broadleaf regeneration and larch plantation