The impact of invasive species on native vegetation is a major threat to
biodiversity all over the world-a threat ranked second only to habitat
destruction. Other negative effects of weed invasio9ns include reduced ecosystem
service4s. losses to agricultural production and impacts on human health.
Weed Risk Assessment is the first publication to explore the discipline of risk
assessment as applied to the invasion ecology of plants. Taking a global
context. It synthesizes recent theories on plant invasions. Introduces a variety
of models for weed risk assessment. And addresses procedures for ranking
invasive species on a range of scales to determine the relative significance of
weeds. It shows