An index of structural complexity for Apennine beech forests

Researchers developed the Structural Heterogeneity Index (SHI), a novel tool to quantify structural complexity in Apennine beech forests, which effectively discriminates between old-growth and managed stands. The SHI, derived from eight core attributes rescaled to 0-10 using regression equations, ranges from 38 to 99.9, with higher values indicating greater structural heterogeneity. Validated against ten reference old-growth stands, the index demonstrated a linear increase with stand age and was significantly higher in multi-layer forests compared to single- or double-layered ones. This approach offers foresters a practical method for assessing and restoring structural complexity in second-growth stands, supporting biodiversity conservation efforts.

Sabatini, F., Burrascano, S., Lombardi, F., Chirici, G., & Blasi, C. (2015). An index of structural complexity for Apennine beech forests. iForest - Biogeosciences and Forestry, 8(3), 314–323. https://doi.org/10.3832/ifor1160-008