Compromise reached over wilding pines

Selective felling of trees at the southern entrance to Cromwell may set a precedent for the contentious issue of wilding pine control, those involved hope.

Brewery Creek residents and the Central Otago Wilding Conifer Control Group (CWG) have agreed to fell about 1000 trees on a rocky promontory just before the Cromwell lookout.

Sarah Cottle is the spokeswoman for the owners of five dwellings at Brewery Creek, in a cluster nestled below the Goldminers Monument on State Highway 8.

Wilding conifers have been a source of contention in Central Otago, particularly those at the southern entrance to Alexandra on the council-owned Half Mile Hill reserve.

Residents in neighbouring Bridge Hill opposed to the logging of pines in the reserve, cite the loss of bird habitat and the sound and wind shelter the trees provide as reasons against indiscriminate felling in the area. The council paused its eradication programme at Half Mile last November due to strong opposition from some members of the public.

CWG outgoing project manager Phil Murray and Ms Cottle sat down to discuss transitioning amenity plantings away from spreading conifers.

Wilding pines on Central Otago District Council-owned land on the Half Mile near Alexandra. PHOTO...
Wilding pines on Central Otago District Council-owned land on the Half Mile near Alexandra. Photo: Central Otago District Council

Mr Murray contacted the residents to discuss the pines on their land, which was considered a super spreader site for spreading conifers. The prevailing norwester winds distribute seeds for many kilometres downwind through the Cromwell Gorge and across the river to the slopes above the Lake Dunstan Trail.

He said pinus radiata was not necessarily a problem elsewhere in New Zealand but the intense heat in Central Otago caused the pine cones to open and release their seeds to spread.

In Central Otago’s dry climate, wilding conifers displace other species and take precious water from catchment areas.

"It has huge implications on water yield," he said. "We are the driest area in New Zealand, where water is gold."

Close to 1000 trees would be removed from the site, including several hundred large pines, Mr Murray said, with work expected to start before Christmas.

"There are some pines we agreed to leave."

Ms Cottle said the residents’ initial response was in defence of the pines, but they had come to understand the impact of conifers on the wider landscape.

"It has been a learning curve for us," Ms Cottle said.

"We have gone from saying, ‘No, no, you are not touching our trees,’ to learning how much of a pest they are.

"At the same time, they have become iconic.

"We would like to think when the pines are gone, they can be replanted with natives."

Mr Murray said all communities face a similar conundrum.

"What the residents at Brewery Creek are going through is the first part of the journey the rest of us are going to have to go through.

"It’s a journey of discovery of how we transition this dry, harsh landscape through to species that are either exotic or native that don’t spread, that provide the same amenity the pine trees do."

"This is true for Brewery Creek as it is for Alexandra and places like the Half Mile Reserve."

The group is funded by the Otago Regional Council, the Central Otago District Council and Land Information New Zealand, with 80% of the project costs met by the central government.

Council, in its full meeting last week, approved its Tree Policy 2022, which included the addition of the Wilding Conifer Control Policy.

tracey.barrett@thenews.co.nz