Weed Threat Level Assessment

Comparison

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Overall Threat >70 · Low 50–70 · Moderate 30–50 · High 0–30 · Very high

Method. Each tier's negative score = % cover × weight (High ×1.0, Moderate ×0.7, Low ×0.2). Site score = max(0, 100 − ΣnegativeScores). Combined invasive % = sum of the three tier covers. Cover is recorded per tier, not per species — the species list is a record only. Bands: >70 low · 50–70 moderate · 30–50 high · 0–30 very high.
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