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Biosecurity services

"Aquatic weeds, the silent invaders of our waterways, pose a particular biosecurity problem for New Zealand."

Biodiversity Strategy 2000

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The success of invasive water weeds in New Zealand is spectacular, at the cost of native biodiversity, hydro-electric power generation and recreational use of our waterways.

NIWA assesses the risks posed by potential aquatic weeds, both within New Zealand and at our borders, and advises on priority species for biosecurity management. The ways (pathways) and means (vectors) how weeds are spread are identified, as are ways to intercept them. The impacts of weeds and their management on the environment are quantified so that the ecological costs and benefits of biosecurity actions are clarified. A major goal is to expand the toolbox of solutions for the control and eradication of aquatic weeds and to best match solutions with specific weed situations.


Assess threats

Inventory introduced species

Assess competitiveness

Develop Risk Assessment Models

ID pathways & vectors

Advise surveillance strategies

Invasion outcomes

Measure impacts of invasive species

Measure impacts of control l

ID risk of hybridisation

Managing weeds

Trial herbicides for NZ use

Advise integrated management


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