Archives For Restoration

Restoration work has been undertaken at the recently vandalised Cone Hut which has stood for the best part of 70 years in the Tauherenikau Valley.

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On Friday the Motutapu Restoration Trust celebrated 21 years of volunteer conservation work on Motutapu Island.

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The Cobb Valley tent camp was the last one of it’s kind but action was required to restore this important part of New Zealand’s deer culling heritage.

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DOC Ranger, Norm Macdonald, writes about removing the last remaining deer from Secretary Island, in Fiordland—creating a haven for vulnerable native species.

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By Trish Irvine, Community Relations Ranger, Auckland

It takes a bit of organising to have volunteers follow biosecurity rules and be at various wharves around Auckland to meet the DOC boat for our ‘Overnight Island Volunteer Experience‘ on Rangitoto and Motutapu Islands.

Rangitoto Island from the mainland.

Volunteers contribute and learn about pest free Rangitoto and Motutapu Island projects

The five volunteers on this particular trip—a retired man who regularly volunteers for DOC, a couple from overseas on a working holiday, a teacher and a university student—are all keen, and want to contribute and learn about pest free Rangitoto and Motutapu Island projects. Volunteer numbers are increasing as word gets out about what DOC has to offer.

It’s a Thursday morning and I am running along Quay St to get to Pier 3 before 7.45 am. The DOC boat ‘Taikehu’ and Chris Giblin the skipper are already moored and the volunteers are waiting on the pontoon. I welcome them and check them off my list.

Volunteers digging out a historic structure.

Digging out a historic structure

We do a quick biosecurity check and zoom off to Devonport Yacht Club jetty to meet the rest of the team and load our work gear onto the boat. The ranger, Nigel Harper, joins us—loading our tools and kete of tea, coffee, milk and fresh home baking.

It is a calm clear day as we cruise the Hauraki Gulf to Islington Bay wharf on Rangitoto, where Rodway the Island Ranger meets us and has a DOC ute waiting. We drive to the Blue House, our home for the night, unload our gear and have a cuppa over a health and safety briefing and introduce the programme for the day.

At the summit loop track on Rangitoto we continue the work to maintain the historic structures that were cleared of vegetation on our last overnight trip. This time we dig out soil, spray some environmentally friendly moss and lichen remover, and sweep the boardwalk of leaves. Nigel takes measurements to make a cover for the drainage hole.

At the Fire Command Post on the summit of Rangitoto we climb onto the roof for magnificent views of Auckland and to sweep and scrape it clean of lichen and debris. We feel like we are on top of the world having such a beautiful lunch spot. The Post gets a coat of a tar-like sealant to waterproof it after lunch, and we do the same to the radio room, which is looking great with a new wooden floor.

A ranger and a volunteer hard at work restoring a structure on the island.

Hard at work

Driving back to the house we feel like we have the island to ourselves; it is so peaceful, there is no one else about. Nigel starts the fire that warms the whole house and we settle in for the evening.

The next day we clean the Blue House and pack up our gear so we can spend as much time as possible at the WWII Battery on Motutapu. Here we clear the drains, scrape the steel, work with wire brushes and apply fish oil to stop it corroding further. All before dashing back to the house, washing the tools and utes, and collecting our gear.

Chris and the ‘Taikehu’ are at the wharf to transport us back to Auckland—we’re feeling revitalised, alive and buzzing from such an awesome trip.

Volunteers scraping steelworks on the battery.

Scraping metal on the battery

The ‘Overnight Island’ experience is one of a number of volunteer opportunities on offer in Auckland. Many individuals, corporate groups, university students and overseas travellers have participated so far.

The next Overnight Island restoration trip is proving to be popular—it is already fully booked with a few people on the waiting list.

Volunteer with DOC

Being a volunteer is fun. You also get to work as part of a team, share your skills and learn new ones, and experience conservation in action. Visit the DOC website to volunteer with DOC.

By Wendy Sullivan, Project Coordinator

World Wetlands Day is celebrated on 2nd February and promotes wetland protection throughout the world. Wendy Sullivan, DOC Project Coordinator, tells us about the current wetlands restoration project occurring in the Canterbury high country.

O Tu Wharekai Wetlands.

O Tu Wharekai Wetlands

O Tu Wharekai Wetland Restoration Project its situated in the high country of Canterbury. The project is one of the best examples of an inter-montane (between or among mountains) wetland system remaining in New Zealand, and is nationally important for wildlife. It contains a mosaic of diverse wetland habitats nestled amongst high country tussocklands and set against the towering Southern Alps/Kā Tiritiri o te Moana. The project includes the braided upper Rangitata River, and the 12 lakes that make up the Ashburton Lakes, along with ephemeral turfs, streams, swamps and bogs.

Lake Emily in the Hakatere Conservation Park.

Lake Emily in the Hakatere Conservation Park

New Zealand has experienced significant loss of wetlands. Over the last 150 years approximately 90% of inland wetlands (swamps, marshes, fens and bogs) have been converted to other land use. Many of New Zealand’s remaining wetlands are also under threat, mostly the result of human activities including nutrient run-off, pest invasions and drainage.

O Tu Wharekai is aiming to help stop the decline of wetlands through intensive management of the wetlands, researching and trialling new methodologies and raising awareness of the plight of wetlands. It is one of the three Arawai Kākāriki sites, a national wetland restoration programme.

The project has good populations of native and sport fish. Threatened bird species include Australasian bittern, black-fronted tern, wrybill and Australasian crested grebe. There are a number of lizard species including the threatened lizard species scree skink and long-toed skink. The glacial moraines of the high country produce kettleholes which are home to a rare habitat type – ephemeral turfs. Ephemeral turfs are one of the most poorly recognised wetland types. They occur where surface depressions in the land – kettleholes – become ponded with water during wet seasons or wet years, yet are partially or wholly dry at other times. Vegetation consists mainly of herbaceous plants forming a ground-hugging and often dense carpet of intertwined plants. Species present change with changing water levels. They are home to many threatened plant species.

Genetians in kettlehole. Photo by G Iles.

Genetians growing in high country kettleholes

While the area is relatively pristine, there are always threats lurking on the doorstep. There is the potential for water abstraction and storage for irrigation and stock water, and degraded water quality due to sediment and nutrient inputs from intensified farming practice. Broom and Russell lupins threaten the braided rivers, while grey and crack willow threaten the hydrology of lakes, streams and swamps by increasing sedimentation. Swamps, bogs and ephemeral turfs can be damaged by vehicles, rabbits and hares and stock. Predators such as ferrets, stoats, weasels, feral cats, hedgehogs and possums threaten birds, lizards and invertebrates.

Community involvement is also an important element to the project. There are a number of groups, businesses and individual assisting with monitoring and management such as weed control, bird monitoring and riparian planting. Further information can be found on the DOC website.

Australasian crested grebes.

Australasian crested grebes

By Juzah Zammit-Ross

A long history of restoration

Mangere Island in the Chatham’s provides an important predator-free refuge to many rare and endemic invertebrates, birds and plants. Restoration first started on the island in the 1970’s with the Wildlife Service planting akeake shelterbelts in Douglas Basin and on the Top Plateau in an effort to expand the habitat available to black robins. Since the early 1990’s tens of thousands of akeake have been planted on the island thanks to the Tuanui and Moffet families and planting contractors.

Mangere plantings 1981

Plantings in Douglas Basin in 1981. Photo: Dave Crouchley


As part of the ongoing restoration I led a team of seven people in a week of planting on the island in June.  Although the weather was a bit on the miserable side (gale force winds, very cold and hail most days), we kept warm carrying the heavy bags of plants from the boat landing up to the planting area in the basin.  We managed to plant 1850 plants under the emerging canopy, adding diversity amongst older plantings many of which are self seeding and spreading naturally in the basin.

Mangere and Douglas Basin

Looking over Mangere’s Douglas Basin towards Little Mangere

Local produce

The species planted this trip included Chatham Island nikau, kawakawa, hoho (Pseudopanax chathamica), ngaio, mahoe, ribbonwood and matipo. All the plants were eco-sourced, meaning the seeds were collected locally from Mangere, Pitt and South East Islands and were grown in the DOC nursery at Te One before being transported to Mangere and planted.

Tree planting

Filling in the gaps

But wait, there’s more…

As well as planting, we also cleared tracks, checked rat bait stations, ran rodent tracking tunnels and collected seed for future plantings. We also had the opportunity to visit Robin Bush to view the black robins and walk up to the summit  to enjoy the spectacular views of Mangere, Little Mangere and Pitt Island. Next year will be the last year of akeake planting on the island however diversification plantings will carry on for the next ten years as part of the long-term ecological restoration of Mangere Island.

Mangere planting team

Mangere Island winter planting team 2012: Pete Lusk, Nadia Thomas, Ryan Jones, Juzah Zammit-Ross, Mike Van Velzen, Colin Bishop and Denny Prendeville