Invasive Species Presence
Benchmark Value
Scoring Curve
This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context.
Evidence & Context
"If the native habitat that could otherwise be retained within the land parcel contains >25 per cent cover of high threat perennial grassy weeds"
Percent cover of high-threat perennial grassy weeds (e.g., serrated tussock, Chilean needle grass, phalaris) in a native grassland or grassy woodland patch.
Formal degradation threshold under the Melbourne Strategic Assessment program where native habitat is considered too highly invaded to warrant retention.
The cited source explicitly identifies the value as a formal degradation threshold for conservation target grasslands in the temperate dry grassland biome of Australia.
Sources (1)
Final Prescription for Natural Temperate Grassland of the Victorian Volcanic Plain
View SourceSupporting Sources (4)
Additional references from the underlying research that informed this benchmark.
Grassy Eucalypt Woodland of the Victorian Volcanic Plain Conservation Advice
View SourceRevised Floristic Value Scoring Method for grassland condition
View Source
Vegetation Quality Assessment Manual: Guidelines for applying the habitat hectares scoring method
View Source
White Box-Yellow Box-Blakely's Red Gum Grassy Woodlands and Derived Grasslands
View Source