Conservation “good news” stories – the release of native birds into new habitats, for example – are always welcome. They recognise the work of conservation staff and volunteers who do the hard slog of checking trap lines and removing weeds.
Author
Margaret Stanley
Professor of Ecology, University of Auckland, Waipapa Taumata Rau
The reality is, however, that Aotearoa New Zealand’s environment is in deep trouble. Talk of a “crisis” can be unhelpful if it encourages a sense of hopelessness. But with the government’s approaching rapidly, now is arguably the time to use the word.
The bill encourages development, but gives government ministers the key environmental planning and protection processes for (as yet unnamed) infrastructure projects.
By emphasising short-term economic gain, it risks eroding the country’s already fragile natural capital and pushing biodiversity further into decline.
With on the bill closing at the end of this week, there are numerous reasons to call for caution and a pause. These can be divided into five broad categories.
1. Much has been lost already
Ecosystems cannot be restored. Once destroyed, they are gone forever. This is known in restoration ecology as the ““. Here are just some of the facts:
only 22% of Aotearoa’s original vegetation
at least 79 species extinctions have been recorded
remaining species currently threatened or at risk include 94% of reptiles, 90% of seabirds, 74% of land birds, 76% of freshwater fish and 46% of plants
90% of our wetlands have been lost, as well as 80% of our active sand dune ecosystems
63% of rare are threatened
46% of lakes over one hectare are in .
The science of restoration ecology is relatively young. We can plant trees and shrubs, and reintroduce some animals previously present in a restoration area. But we do not currently have the knowledge to restore lichens, mosses, fungi and invertebrate communities.
These all play a major role in the functioning of ecosystems, including decomposition and nutrient cycling.
2. Habitats are fast disappearing
New Zealanders often imagine native vegetation is well protected and the wholesale land clearance practised by earlier generations has stopped.
But many terrestrial ecosystems are still being cleared today for development. Between 2012 and 2018, almost 13,000 hectares (the equivalent of 13,000 rugby fields) of native vegetation was .
We know at least 5,000 hectares of wetlands since 2001. Nearly 12,000 hectares of Canterbury’s river margins were between 1990 and 2012. Ecosystems that remain are degraded and .
The Department of Conservation is underfunded and has not been able to assess and reclassify more than 2.7 million hectares of . Much of this contains rare ecosystems. But it has the lowest protection and may be a prime target for development under the proposed fast-track legislation.
3. Unique NZ has international obligations
Around 80% of most native species – 81% of insects, 100% of reptiles, frogs and bats, 84% of plants, 72% of birds, and 88% of freshwater fish – are . New Zealand has been designated one of 25 “hot spots” for conservation priority.
However, more than 33% of New Zealand species are classified “data deficient”, meaning we don’t know enough to determine whether they are .
We’re also discovering new species every day. Only an estimated 50% of insect species have been scientifically described, including just 30% of (wasps, ants and bees – including pollinators and natural biocontrol agents).
Aotearoa New Zealand is a signatory to the (signed in 1993) and the (signed in 2022). By removing existing environmental protections, the Fast-Track Approvals Bill threatens to undermine these international obligations.
4. Environment underpins economy, health and culture
Biodiversity and healthy ecosystems provide critical services that prop up human populations. They regulate the climate, prevent erosion, cycle nutrients, filter air particles and water, and mitigate floods.
They also provide recreational opportunities, spiritual and cultural connections, and for people.
Ecosystem processes, such as pollination and soil formation, underpin primary production and provide pest and disease resilience. They contributed an (27% of the country’s GDP) to human welfare in 2012.
Failing to recognise the value of New Zealand’s – which has previously often been regarded as value-less economically – risks leaving future generations with even less to support their economy, health and wellbeing.
5. Pushing ecosystems to tipping points
Degraded ecosystems can reach a , when they collapse and stop functioning – for example, the “” of freshwater systems, which become nutrient-rich and depleted of oxygen.
There is now extreme pressure on the biodiversity that supports healthy ecosystems. The economic loss from soil erosion alone () is estimated at NZ$250-$300 million each year. It takes a thousand years to – and it is running out rapidly.
Degraded ecosystems are less resilient to disturbance and are vulnerable to . Roads and tracks created during development can prevent the movement of native animals, while creating “highways” for .
These affect native ecosystems as well as farms and orchards, adding to the country’s already very high .
Taken together, the potential long-term costs on ecosystems and the vital services they provide need to be carefully considered before the proposed legislation comes into force.
Margaret Stanley has received funding for technical advice from the Ministry for Primary Industries and the Ministry for Environment, and for research from the Ministry of Business, Innovation & Employment’s ³Ô¹ÏÍøÕ¾ Science Challenges.
