Management of Hydrocotyle ranunculoides L.f., an aquatic invasive weed of urban waterways in Western Australia.
In 1983, H. ranunculoides was first observed in the urban drainage network in the Canning River Regional Park, Western Australia. By 1991 the plant had extended throughout the drainage network into the river and adjacent wetlands. A group of state and local government and community members assessed environmental, technical and social interactions and developed an integrated management strategy for the weed, using a combination of physical, chemical and ecological techniques. The environmental significance of the affected waterways required the programme to be accompanied by appropriate ecological surveillance. The initial short-term control phase was completed successfully. An assessment of water quality and aquatic invertebrates during the initial phase showed only short-term disruption of river ecology following physical and chemical control. The long-term eradication phase is on-going.