THE mountain bark beetle is a familiar pest in the forests of British Columbia. Its population rises and falls unpredict ably, destroying clumps of pinewood as it peaks which then regenerate as the bug re cedes. But Scott Green, who studies forest ecology at the University of Northern Brit ish Columbia, says the current outbreak is unprecedented in recorded history: a nat ural backgroundnoise disturbance has be come a major outbreak. We’re looking at the loss of 80% of our forest cover. Other parts of North America have also been af fected, but the damage in British Columbia is particularly severe, and particularly troubling in a province whose economy is dominated by timber.












































