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Research Projects

INSECT POPULATION DISTRIBUTION AND CLIMATE CHANGE

Forest Defoliators and Climatic Change: Potential Changes in Spatial Distribution of Outbreaks of Western Spruce Budworm (Lepidoptera: Tortricidae) and Gypsy Moth (Lepidoptera: Lymontriidae)

Williams, D.W. and Liebhold, A.M. (1995): Forest Defoliators and Climatic Change: Potential Changes in Spatial Distribution of Outbreaks of Western Spruce Budworm and Gypsy Moth. Environmental Entomology 24, 1-9.

Figure 4:

Potential outbreak areas of western spruce budworm in Oregon under climatic change scenarios.

(a)Ambient temperature and precipitation. Areas thought to be defoliated  in Oregon under normal conditions.


(b) 2º C increase.
Areas  predicted to be defoliated  in Oregon under a 2 degree C increase in temperature.


(c) 2º C increase with 0.5 mm precipitation per day increase.Areas  predicted to be defoliated  in Oregon under a 2 degree C increase in temperature and 0.5 mm precipitation per day increase.

(d) 2º C increase with 0.5 mm per day decrease.Areas  predicted to be defoliated  in Oregon under a 2 degree C decrease in temperature and 0.5 mm precipitation per day decrease.

(e) GISS model.
Areas  predicted to be defoliated  in Oregon under  the GISS model.


(f) GFDL model.
Areas  predicted to be defoliated  in Oregon under  the GFDL model.