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Identifying suspected MPB killed trees from a fixed-wing plane or helicopter. Beetle killed trees are identified by the discoloration of the needles within the first year of attack Age distribution

The distribution of different age classes within the population being examined (Dictionary of Natural Resource Management) Baiting

The variety and variability within and between living organisms from all sources such as terrestrial, marine and other aquatic ecosystems, and the ecological complexes they are part of Blue stain fungus

The living layer of the tree between the sapwood and inner bark that produces the new phloem and xylem Climate change

The establishment of a species in an area that is not currently occupied by that species (Dictionary of Natural Resource Management) Cut and burn

A treatment option that includes hand falling and peeling (removing) the bark off either a single tree or small patches of trees that are currently infested. This method exposes the beetles to the elements, and they die from exposure Declining population

The normal population common to the area which is kept in check by natural factors. It is the first phase of a mountain pine beetle epidemic cycle Epidemic population

The level of risk for ignition and/or spread of fire in a forest. A general term to describe the potential fire behaviour, without regard to the stand of weather-influenced fuel moisture content, and/or resistance to fireguard construction for a given fuel type Fire suppression