Invasive pests have cost New Zealand billions

Invasive pests have cost New Zealand billions
The economic cost of biological invasions in New Zealand from 1960 to 2020 from the InvaCost v4.0 database using only robust costs. Costs are totalled according to the environmental type in which they occurred and, within each environment, by the socioeconomic sectors impacted and the type of costs (management or damage) incurred. Only sectors with costs greater than US$50,000 are presented for clarity. Widths for type and sector costs are scaled relative to their environmental cost contributions. Environmental costs are labeled in white within the figure scene. Credit: PeerJ (2022). DOI: 10.7717/peerj.13580

Getting rid of invasive pests such as agricultural weeds, stoats, possums, and fire ants will provide New Zealand with massive economic and ecological benefits, a new study has found.

Invasive species are well known for their huge ecological costs, but they also bring a massive economic burden with sociological, environmental and health impacts.

New research led by the University of Aberdeen and the University of Auckland in collaboration with CNRS, France has established that invasive species have cost the New Zealand economy almost $10 billion in the last 50 years.

While damage costs remain high, this total includes spending far more than most other countries on pre and post-invasion management techniques relative to its GDP.

But by further investing in preventative approaches, including stopping the spread of pests and quick eradication of existing species, the burden on New Zealand's economy will be reduced further.

In 2016 New Zealand launched its ambitious Predator Free 2050 initiative, which seeks to safeguard through the removal of key invasive mammalian predators.

Dr. Thomas Bodey, Research Fellow in the University of Aberdeen's School of Biological Sciences, said, "New Zealand has a proud pioneering role in invasive species management and is at the forefront in this area globally. Despite this, invasive species still pose a huge burden to the country's economy. This analysis has identified a range of billion-dollar impacts, many of which are ongoing but could be mitigated with enhanced management."

Dr. Zach Carter, a researcher at the School of Biological Sciences, University of Auckland, added, "Due to its , New Zealand supports many unique species that cannot co-exist with introduced predators and competitors. Increasing our efforts to tackle these invasive species, including but not exclusively through Predator Free 2050, will be of immense benefit to the country—especially preventative approaches including doubling down on biosecurity and rapid eradication.

"We found cause over $100 million annually in damages to lucrative economic sectors. The direct and indirect benefits afforded to New Zealand by mitigating these damages are likely to far exceed their , especially if they can be accrued over Predator Free's remaining 28-year timeframe."

The research was published in PeerJ on August 15, 2022.

More information: Thomas W. Bodey et al, Building a synthesis of economic costs of biological invasions in New Zealand, PeerJ (2022). DOI: 10.7717/peerj.13580

Journal information: PeerJ

Citation: Invasive pests have cost New Zealand billions (2022, August 16) retrieved 24 September 2023 from
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