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 5 benchmarks together — the OptimalRange form drives the primary score, while 4 guard(s) constrain the result.
Contributing Benchmarks
Evidence & Context
A basal area of < 3 m²/ha can be established as a conservative and defensible lower critical threshold.
Basal area is the total cross-sectional area of all tree stems in a given area, measured at breast height.
This benchmark defines a lower critical threshold of 3 m²/ha basal area, below which the ecosystem transitions to a derived grassland, losing its woodland character.
This value is significantly below the basal areas observed in healthy old-growth remnants and even substantially lower than the most aggressive thinning targets in restoration projects.
Sources (1)
Approved Conservation Advice for the White Box - Yellow Box - Blakely's Red Gum Grassy Woodland and Derived Native Grassland - DCCEEW
View SourceSupporting Sources (1)
Additional references from the underlying research that informed this benchmark.
Ecological Thinning Trial in New South Wales and Victorian River Red Gum Forests - Environment and Heritage
View Source