A Research Study On The School Fire Occurred On Public Land

1455 WordsNov 14, 20156 Pages
Introduction The first question to be addressed in this study is, will there be varying tree seedling species diversity in relation to varying levels of burn severity? My hypothesis for this question is that we will see the highest tree species diversity where we see a moderate level of burn severity. The second question of the study asks, did the presence of salvage logging lead to a difference in the tree seedling densities as compared to unlogged sites? My hypothesis for this question is that there will be a greater density of tree species in the salvage logged site than the unlogged site. Methods The School Fire occurred on public land in Washington’s Umatilla National Forest in August, 2005. It burned approximately 21,000 ha of grassland and mixed conifer forest (Figure 1). Pre-disturbance stand structure of the mixed conifer forest in the area was dominated by ponderosa pine (Pinus ponderosa; PIPO), Douglas-fir (Pseudotsuga menziesii; PSME), grand fir (Abies grandis; ABGR), lodgepole pine (Pinus contorta; PICO), western larch (Larix occidentalis; LAOC), Engelmann spruce (Picea engelmannii; PIEN), and western white pine (Pinus monticola; PIMO). Post-fire treatments included the initiation of salvage logging in some areas, as well as seeding areas of high burn severity with native grasses in the hopes of limiting soil erosion and spread of invasive species (Higuera, Morgan 2015). Data collection sites were coded and chosen randomly on sites of varying burn severity,

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