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Pest-free islands create big conservation gains
Pest-free islands create big conservation gains - Expert
reaction
22 March 2016
New Zealand is leading the
world when it comes to preserving islands' unique and
fragile wildlife by eliminating invasive mammals, according
to new research.
The international team of researchers,
including several New Zealanders, systematically assessed
the global impact of eradicating invasive mammals, such as
rats, goats and cats, from islands.
Their findings, published today in PNAS, identified more than 230 species on 181 islands that had benefited from eradications. The authors conclude the island pest control is one of the most cost-effective approaches for conservation and note that New Zealand has lead the way.
“Many eradication techniques were first developed in New Zealand, so much so that it's been commonplace to ‘call the Kiwis’ if you want to eradicate mammals,” said study co-author Holly Jones, an assistant professor in biological sciences at Northern Illinois University. “Now, more and more conservation organizations worldwide are embracing this conservation intervention.”
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The Science Media Centre collected the following expert commentary (abridged). Registered journalists can access full commentary and contact details for these researchers on Scimex.org (must be logged in).
Prof Bruce Clarkson, Director of the Environmental Research Institute, University of Waikato, comments:
"This is a compelling evidence based analysis and yes, islands (offshore islands) are a silver bullet for biodiversity conservation. Congratulations to the authors for pulling this together. But they are one silver bullet with others needed. Offshore islands can never save all of New Zealand's indigenous biodiversity as they are unrepresentative of the full range of ecosystems and habitats of the New Zealand archipelago.
"Offshore island restoration is also significant as the springboard for the later development of mainland island approaches and the new frontier urban restoration which seeks to reconnect New Zealanders with their biological heritage by reinstating key species in urban environments, for example Zealandia."
Dr Marie Brown, Senior Policy Analyst, Environmental Defence Society, comments:
"Island sanctuaries provide a critical first line of defence against extinction and have been instrumental in securing small populations of threatened species here and globally. New Zealand has led the charge here and the success of these amazing projects demonstrates both their ecological importance and the unique contribution of NZ science to the rest of the world.
"All of New Zealand’s landmass is an ‘island’ by definition, so this paper illustrates the game-changing impact that a transformative project like Predator Free New Zealand could have. We’d be having very different conversations about conservation in the absence of pests. The challenge here and elsewhere is to work out how to best apply those techniques to populated areas
"It is important to note however, that pest control is the removal of just one pressure. Habitat loss presents an equal or greater threat, and we must do very much better at curtailing that – so that when populations rebound as set out in the article, they have somewhere to live."
ends
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