The substitution effect
In essence sustainable managed forests are carbon neutral after the first rotation. However, continued inflow of wood from harvest of successive rotations into the harvested wood product (HWP) pool, avoidance of emissions by substituting wood for energy intensive product with wood and by substituting bioenergy for fossil fuels use represents the largest carbon pool. This C pool increases after every harvest because the removal is permanent.
Compared to unmanaged forests (Perez-Garcia et al., 2005) and continuous cover forestry systems (Lundmark et al., 2014), high production plantation with optimized for long term HWP can store double the amount of carbon at 100years (see figure above, Black, unpublished).