Vegetation response to harvesting, harvesting and prescribed-burning and wildfire in Northwestern Ontario : patterns of reproductive strategies and nutrient accumulation
Initial species composition was investigated on a group of boreal
mixedwood sites that had experienced various forms of disturbance. The
hypothesis explored was that environmental changes caused by different
disturbances would be reflected in patterns of revegetation. The disturbance
types were as follows: (1) Harvest, winter, full tree logged cutovers, delimbed at
the road side; (2) Prescribed-bum, cutovers burned in early spring; (3) Reburn,
cutovers which were Prescribed-burned and subsequently experienced a
wildfire; (4) Wildfire, a low severity crown fire in mature forest; (5) Control, 70
year old forest with a species composition of white spruce (Picea glauca
(Moench)Voss), black spruce (Picea mariana (Miller) Britton), balsam fir (Abies
balsamea (L.) Miller) and white birch (Betula papyrifera Marshall)