Long-Term Vegetation Plots
Studying forest dynamics takes decades, even centuries. The western Cascade Mountains of Oregon, including the H. J. Andrews Experimental Forest, harbor centuries-old stands of old-growth forests, which are known for their high biomass, complex structure, and multi-layered forest canopies. In 1971, scientists established multiple permanent sample plots across the H. J. Andrews Experimental Forest and elsewhere in the region, largely to study old-growth forest ecosystems. Scientists continue to visit the plots every year.