Blodgett Title

Project title: Effects of burn pile residue on planted seedling survival, growth, and brush competition beneath a shelterwood overstory. Seedlings were measured near the end of the first, second, fourth, and seventh growing seasons.

Project history: A shelterwood seed-step harvest (all but 12 trees/acre removed) was done in 1997. Logging residue was piled and burned in Fall, 1997. Sugar pine, Douglas-fir, incense cedar, ponderosa pine, and giant sequoia seedlings were planted within, on the edges, and outside of areas with burn pile residue. Sugar pines are replicated across 100 plots; the other species are replicated 50 times each.

Research questions: What is the relative performance (survival and growth) of species regenerating beneath a partial overstory? What effect does proximity to burn pile have on performance? How does the effect of burn pile proximity on non-tree density influence the seedling performance?

1. Select fields:

Plot: Plot label given to each plot
Tree No: Sequential number of study tree; numbers start at one for each plot
Species: Species abbreviation - SP=Sugar Pine, GS=Giant Sequoia, IC=Incense Cedar, PP=Ponderosa Pine, DF=Douglas-fir
Azimuth: Azimuth (degrees) from plot center to study tree
Distance: Distance (feet) from plot center to study tree
Family: For sugar pine only, identification of parent tree
Burn: I=inside ash circle, E=on edge of ash circle, 0=outside of ash circle
Status: L=alive, D=dead, M=missing, X=previously dead or missing
Basal Area: of overstory trees surrounding plot; measured with a 10 Basal Area Factor (ft2/acre prism)
Basal diameter: in inches measured at 4 inches up the length of the stem from the uphill
Height: Height of tree from the uphill side
Foliage Quality: N=normal, P=pale, T=thin; measured in 1998, 1999, and 2001
Damage & Disease: Damage & Disease: H=healthy, F=forked, K=crook, T=broken top, L=lean, B=skinned bole; measured in 1998, 1999, and 2001
Shrub Cover(%): Percentage cover ocularly estimated on a 1/1000 acre circular plot surrounding the study tree
Mean Shrub Height (ft): Mean shrub height on the 1/1000 acre plot surrounding the study tree; measured in 2001 and 2004
Dominate Species: Dominant species within the 1/1000 acre plot; measured in 2004
Comments: Comment taken during measurement

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3. Select Output:

 

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