Basal Area
Benchmark Value
Scoring Curve
This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context. The scoring engine uses 15 benchmarks together — the OptimalRange form drives the primary score, while 14 guard(s) constrain the result.
Evidence & Context
A sustained Basal Area below approximately 4-5 m²/ha (for stems >20cm DBH) could be indicative of significant degradation, extremely poor site conditions, or the consequences of overly intensive harvesting.
Basal area, typically expressed in square meters per hectare (m²/ha), is a fundamental metric in forestry and ecological assessment. It quantifies the cross-sectional area of tree stems at breast height per unit of ground area, thereby reflecting stand density, average tree size, accumulated biomass, and overall forest structure.
This benchmark represents a lower critical threshold of basal area below which the ecological health and sustainability of Tropical Monsoonal Savanna production forests are significantly compromised.
This threshold is an estimation based on the lower end of observed ranges in natural systems and the general ecological understanding that very open stands may struggle with regeneration, be more susceptible to invasive species, or provide limited overall ecological services.
Sources (1)
Hollow formation in the Eucalyptus miniata–E. tetrodonta open forests and savanna woodlands of tropical northern Australia - ResearchGate, accessed May 15, 2025
View SourceSupporting Sources (6)
Additional references from the underlying research that informed this benchmark.
depws.nt.gov.au, accessed May 15, 2025
View SourceLivestock grazing management and biodiversity conservation in Australian temperate grassy landscapes
View SourceFire exclusion and the changing landscape of Queensland's Wet Tropics Bioregion 1. The extent and pattern of transition - ResearchGate, accessed May 15, 2025
View SourceSocial‐ecological resilience thinking: Can indigenous culture guide environmental management? - ResearchGate, accessed May 15, 2025
View SourceIronwood Erythrophleum chlorostachys in the Northern Territory ..., accessed May 15, 2025
View Sourcealuminium-stewardship.org, accessed May 15, 2025
View Source