Regeneration and Growth Following Mountain Pine Beetle Attack: A Synthesis of Knowledge

Abstract

The mountain pine beetle (Dendroctonus ponderosae Hopkins; MPB) infestation has altered forests of lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) to an unprecedented extent in British Columbia. After an MPB outbreak, advance regeneration significantly contributed to form a new canopy and stand; however, the time needed to form a new stand depends on site-specific conditions. Assessment of regeneration and the growth of residual trees in stands after MPB attack are critical for three purposes: (1) forecasting long-term development (yield) of attacked stands; (2) selecting stands for growth-improving silvicultural treatments; and (3) forecasting impacts to ecological attributes such as hydrology, habitat, and vegetation types. This article reviews and synthesizes recent research concerning lodgepole pine stand performance after MPB attack in British Columbia. Species composition, abundance, spatial distribution, and overall stand health are described. This information is important for forest managers or practitioners who make decisions regarding management of MPB-attacked stands. Moreover, a number of key gaps exist in our knowledge about factors affecting advance regeneration and the residual trees of MPB-attacked stands. This article presents a list of knowledge gaps for management information and further research initiatives.

Quantifying forest disturbance regimes within caribou (Rangifer tarandus) range in British Columbia

“…Our results indicated that NSR was characterized by vastly more, but much smaller disturbance events than fire or harvesting. This follows an ecological understanding of NSR, wherein stands are often made up of trees of differing levels of vulnerability and different species, and thus forested areas experiencing NSR often end up as a mosaic of differing ages, species, and levels of disturbance 86 , 87 . It is possible that, due to the non-stand replacing nature, and mosaic of differing age classes and species created by this disturbance, habitat fragmentation impacts are less than the small event size and large number of disturbance events would imply.…”