Long-Term Ecological Research (LTER)/AND008: Plant Biomass Dynamics Following Logging and Burning in H.J. Andrews Forest

The study was initiated in 1962 (see data set TP09 for 1962-77 data). Both watersheds were dominated by old-growth and mature Douglas fir/western hemlock forest prior to logging.

Plots were classified into one of six pre-disturbance plant communities, one of nine soil series, and one of four soil disturbance classes resulting from logging and burning. A total of 131 plots are evenly spaced on six transects within three cutting units on Watershed 1 (total of 25 ha logged), 61 plots on Watershed 3. Data collected include: (1) visual estimates of canopy cover for all vascular plant species, for ground surface categories (i.e., bare ground, stone, litter, log, stump), and for moss and lichen; (2) stem diameters and other biomass parameters (e.g., numbers of stems or stem heights) for all tall woody species and some herbaceous taxa to generate biomass estimates; and (3) basal or DBH stem diameters for tagged trees(> 1.4 m tall).