During Cyclones Hale and Gabrielle the poor management of exotic plantations in Aotearoa New Zealand — primarily pine — has again led to extensive damage in Tairāwhiti.

Critical public infrastructure destroyed; highly productive agricultural and horticultural land washed away or buried; houses, fences and sheds knocked over; people’s lives and dreams upended; people dead.

The impacts on natural ecosystems are still unknown, but there will have been extensive damage in terrestrial, freshwater and marine environments. Similar damage occurred during storms in June 2018 and July 2020.

• READ MORE: Cyclone Gabrielle triggers more destructive forestry ‘slash’ — NZ must change how it grows trees
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While heavy rainfall and flooded rivers are a major factor, it is sediment and slash from plantation harvesting that has been the cause of most of the damage.

Slash is the woody material (including large logs) left after clear-fell harvesting of commercial forests.

Landslides in harvested sites pick up the material and carry it downstream, causing significant damage. All the evidence from Cyclone Gabrielle shows that much of the damage was caused by radiata pine slash.

The legacy of poor land management
Sediment and slash from exotic tree harvesting sites were established as major factors in the damage that occurred during the June 2018 Tolaga Bay storm in recent court cases taken by Gisborne District Council.

Five plantation companies were found guilty and fined for breaching resource consent conditions relating to their management practices.

Multiple groups have called for an inquiry into the way plantation harvest sites are being managed in Tairāwhiti and elsewhere.

But given the severity and ongoing nature of these impacts, is it not time we move beyond focusing on management practices and address the broader underlying issues that have triggered this situation?

These ultimate causes are complex but primarily revolve around historic poor land management decision-making and human-induced climate change.

‘East Coast disaster’: Environmental group calls for inquiry into forestry practices https://t.co/pjTVIiy0Cf pic.twitter.com/MQYkVZCMAY

— nzherald (@nzherald) January 13, 2023

Among the key drivers of the current problems in Tairāwhiti are the large areas of exotic tree plantations that were established with government support after the devastation of Cyclone Bola.

But this devastation also reflects earlier poor land management decisions to clear native forest off steep, erodible hill country in the late 19th and early 20th centuries, which was also encouraged by the government of the day.

Looming climate change
The other underlying driver of the disaster is human-induced climate change. Atmospheric CO2 levels are now 150 percent above pre-industrial levels and climates are changing rapidly with new and unprecedented events becoming the norm.

While increasing global temperatures are the most obvious feature of human-induced climate change, it is the increasing frequency and intensity of extreme weather events that are having the biggest impacts on people and the environment.

It is essential that we hold the forestry sector accountable in Tairāwhiti and elsewhere. But we also need to urgently address the underlying causes because no matter how strict harvesting rules are, storm events are going to occur with increasing frequency and intensity.

Time for urgent action
With more than 40 years experience researching forest ecology and sustainable land management in Aotearoa, I believe there are four key areas where we need to urgently act to address these issues.

1. As a country we need to rapidly reduce greenhouse gas emissions and rapidly increase the draw-down of CO2 out of the atmosphere. These are national issues and not confined to Tairāwhiti but as a nation we seem to be sleepwalking in our response to the climate emergency.
2. We need a comprehensive catchment-by-catchment assessment across all of Tairāwhiti (and likely other areas of Aotearoa) to identify those plantations that are located in the wrong place in terms of potential harvesting impacts. There should be no further harvesting in Tairāwhiti plantations until this exercise has been completed. We also need to identify those areas that currently lack plantations but should never be planted in exotic tree crops (for any purpose).
3. The government then needs to buy out the current owners of these plantations and embark on a programme of careful conversion to native forest. This will come at a cost, but it needs to be done. We already have models for this in Tairāwhiti where the Gisborne District Council has started converting pine forests in its water supply catchment to native forests.
4. Finally, we need to establish substantially more native forests throughout all Tairāwhiti, and Aotearoa more generally, to help build resilience in our landscapes.

The consequences of short-term thinking
For too long we have been fixated in Aotearoa with maximising short-term returns from exotic tree crops without thinking about long-term consequences. The legacies of this fixation are now really starting to impact us as the climate emergency exposes the risks that poorly sited and managed exotic tree crops pose.

And we are now making the same mistakes with exotic carbon tree crops, again leaving unacceptable legacies for future generations to deal with because of a focus on short-term financial gains.

Exotic tree plantations have dominated forest policy in Aotearoa and we urgently need to shift this to a focus on diverse native forests.

Our native rainforests provide so many benefits that exotic tree crops can never provide.

They are critical for the conservation of our native biodiversity, providing habitat for a myriad of plant, animal, fungal and microbial species. They also regulate local climates, enhance water quality and reduce erosion. This helps sustain healthy freshwater and marine environments.

Native replanting initiatives championed by charities like Pure Advantage need to be the primary focus of forest policy in Aotearoa now and in the future.

Dr David Norton, emeritus professor, University of Canterbury.  This article is republished from The Conversation under a Creative Commons licence. Read the original article.

At least 2500 people have been displaced by Cyclone Gabrielle this week, says Emergency Management Minister Kieran McAnulty.

About 1000 of those are in the Far North and another 1000 in Hawke’s Bay. The rest are mostly from Auckland, with some also in Bay of Plenty and Waikato.

But little is known about the situation in the east, with communications minimal and access hampered due to continued high winds and rain.

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Hawke’s Bay Civil Defence said a women had died in Putorino, after a bank collapsed onto her home.

Wairoa is of particular concern, with the National Emergency Management Agency (NEMA) “working very hard” to find out what is happening in the northern Hawke’s Bay region.

Prime Minister Chris Hipkins, speaking to media yesterday with McAnulty, said the Telecommunications Emergency Forum “has been activated and is working closely with NEMA and local Civil Defence organisations”.

“The first priority… remains the restoration of regional cellphone signals. High winds and ongoing poor weather is hampering progress in that area.”

There has also been a fibre cut affecting Taupō, Hastings and Napier and other areas.

‘Completely isolated’ Wairoa only has one day’s food, Civil Defence says https://t.co/UBjWe4suda

— RNZ News (@rnz_news) February 14, 2023

Comparisons to Cyclone Bola
Hipkins called Cyclone Gabrielle the most significant weather event in New Zealand so far this century.

“The severity and the breadth of damage we are seeing has not been seen in a generation.”

Asked how it compared to 1988’s destructive Cyclone Bola, Hipkins said he “wasn’t around in this kind of role” then so could not immediately compare the two. Officials were still building a picture of the impact of the cyclone, he said.

“In the last 24 hours or so, Fire and Emergency New Zealand have 1842 incidents related to Cyclone Gabrielle in their system . . . Two-hundred defence force personnel have so far been deployed and there are more on standby.”

Transpower had announced a national grid emergency, following the loss of power to the Hawke’s Bay and Gisborne, with potential for extended periods of outages, Hipkins said.

“This is a very significant event for the electricity network and the companies have not seen this level of damage since Cyclone Bola . . .

“The situation is changing rapidly and the lines companies are expecting more customers to be affected. They are working to restore power as quickly as possible… but restoration in some parts may have to wait until weather conditions improve.”

Many supermarkets in Northland have been affected and closed. People were asked to only buy what they needed, Hipkins said, urging people to avoid non-essential travel. If it was unavoidable, people should let friends and family know where they were going, he added.

“A high number of roads have been affected by surface flooding and by slips.”

The latest available information is on the Waka Kotahi website, which remained the best source of information for anyone having to travel, Hipkins said.

“On behalf of all New Zealanders I want to extend all of our gratitude to our emergency responders. They are putting in the hard yards and their lives are on the line in the service of their communities.

“To the families of the volunteer firefighters who responded to events in Muriwai last night and to the wider Fire and Emergency New Zealand family, our thoughts and hopes are with all of you.”

“To the men and women of the Defence Force, the linemen and women, the communication companies, the supermarkets, the transport companies getting goods to where they are needed, the roading crews that are making that all possible, thank you to you also.”

Danger remains
The good news is the weather is expected to ease overnight, Hipkins said. But that did not mean the danger would ease as quickly.

“People should still expect some bad weather overnight, particularly on the East Coast . . .  as we know from experience over the last few weeks, even if the rainfall eases off a bit, more rainfall can compound on top of the rainfall that we’ve already seen.

“So when it comes to slips and so on, we could still see more of that even as the weather starts to ease. We’re still in for a bumpy time ahead.”

The prime minister declined to put a figure on what the recovery might cost, but said insurance companies would cover a “significant portion”.

“People will pick numbers out of thin air and they may be right or they may be wrong. It’s really too early to put an exact number on it.”

He said it could impact on already fast-rising food prices, and would not rule out seeking international assistance.

Some farmers’ land has been damaged not just by the flooding, but forestry waste known as “slash”.

Hipkins said something would definitely need to be done to lessen the risk of slash destruction in the future.

Climate change’s contribution
As for climate change’s impact on the sheer scale of the storm, Hipkins rejected a suggestion that his actions since taking over as Prime Minister have weakened New Zealand’s efforts towards reducing emissions.

As a part of his policy reset, Hipkins canned a planned biofuels mandate and extended subsidies for fuel, a major contributor to warming.

“There is significant debate about whether the biofuels mandate was the right way of reducing our emissions from transport, when there are the other alternatives and other things that we can look at,” he explained.

“In terms of extending the fuel subsidies, we have to acknowledge that actually, there are people still having to get in their cars every day to drive to work, and we need to support them through what is a very, very difficult time at the moment.

“That does not in any way — I don’t believe — undermine our commitment to tackling the causes of climate change.”

He said Gabrielle’s impact would have “underscored” the need to keep reducing emissions.

“It is real, it is having an impact and we have a responsibility to do something about it.”

This article is republished under a community partnership agreement with RNZ.

Cyclone Gabrielle: Rural Hawke’s Bay residents scramble onto roofs to avoid flooding https://t.co/7qEDU7dSkh

— RNZ News (@rnz_news) February 14, 2023