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Fig. 4 | Fire Ecology

Fig. 4

From: Topography and post-fire climatic conditions shape spatio-temporal patterns of conifer establishment and growth

Fig. 4

Annual establishment (stems ha-1) for each species since fire: (a) subalpine fir, (b) Engelmann spruce, (c) western larch, (d) ponderosa pine, (e) lodgepole pine, and (f) Douglas-fir. Juvenile densities are averages across all sites sampled; note the left-hand y-axis changes for each species. Black lines represent the cumulative percentage of all juveniles established by a given year. Colors below each bar represent the SPEI values averaged for the beginning of the growing season (April, May, June, and July) of that year. Orange values indicate doughty conditions and blue values indicate non-droughty conditions. For reference, in the 30 years prior to the Tripod Fire, only 19 months (of 360) had SPEI values less than −1.5 (indicating very droughty conditions), and only 15 months (of 360) had SPEI values greater than 1.5 (indicating very wet conditions). Data were collected in 2016 on the Tripod Fire in the Okanogan-Wenatchee National Forest, Washington, USA

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