This movie shows the changes in tree density before and after fire suppression.
(Flash Player required)
These photos were taken at Lick Creek in the
Bitterroot Valley of Montana over an eighty-year period. The first photo was
taken in 1909, after about half the trees had been cut. Without fire, ponderosa
pine is gradually replaced by dense Douglas-fir. Both logged and unlogged stands
of ponderosa pine have changed in this way.