Caribou habitat restoration may be ineffective in the short term, says UBC study

Caribou habitat restoration may be ineffective in the short term, says UBC study

Wildlife responses to habitat restoration are often assumed rather than verified, a new B.C. study suggests

A new study done in northeastern Alberta suggests habitat restoration may not be enough to save threatened woodland caribou, at least in the short term, and researchers at the University of British Columbia say their results make the case for a more rigorous analysis of conservation methods.

Much of the caribou habitat in Western Canada has already been degraded by industrial activities, such as oil and gas exploration, so one of the key tools being used to protect caribou is habitat restoration, said Cole Burton, the senior author of the study and a forestry professor who leads the wildlife coexistence lab at the university.

But wildlife responses to habitat restoration are often assumed rather than verified, the study says.

“We can’t just accept on faith that things are working,” Burton said in an interview on Wednesday.

The researchers set out to monitor caribou and their predators, such as black bears and wolves, as well as other prey like moose and white-tailed deer in both restored and unrestored habitat areas between 2015 and 2018.

In northeastern Alberta, they placed hidden cameras along seismic lines — narrow strips of land cleared for oil and gas exploration. They fragment caribou habitat and facilitate the movement of predators, disrupting a natural separation and increasing the predation of caribou, Burton said.

The study, which was published last week in the journal Biological Conservation, showed that most predators and prey used the restored seismic lines about as much as they used the unrestored lines.

Caribou preferred to use more isolated lines and those around low-lying wetland areas, regardless of whether the lines had been restored. Only white-tailed deer were observed using the restored lines less than the unrestored ones, the study found.

The researchers monitored lines that had been restored three to six years before the study as part of an effort by members of the Canadian Oil Sands Innovation Alliance, or COSIA, to reclaim 570 square kilometres of caribou habitat along the Athabasca River about 70 kilometres southwest of Fort McMurray, Alta.

READ MORE: B.C. Interior caribou protection area big enough, minister says

In addition to tree planting, restoration can also include the development of mounds of earth and piles of fallen logs and debris to try to break up the movement and sight lines of predators.

Deterring predators with so-called movement blockers requires substantial effort and modification of the landscape, said Burton, who noted it’s possible that intensifying these efforts could help break up seismic lines more effectively.

The lines Burton and his team studied in Alberta were developed around the 1980s.

“Since that time, industry has tried to change their methods to what they would call low-impact seismic lines, so much narrower (and) maybe not as straight, so they break up the line of sight of the predators, like wolves,” said Burton.

COSIA could not immediately be reached for comment.

The same issues are happening in northeastern B.C., where woodland caribou also roam alongside seismic lines established for oil and gas exploration, Burton said.

In October, the province announced it was allocating $6.5 million over three years for caribou habitat restoration projects, including planting trees, spreading woody debris and installing fences to disrupt the thoroughfares that advantage predators.

But trees grow back slowly in the northern Boreal forest, which means caribou habitat restoration is a long-term process, Burton said.

A spokesperson for the B.C. Ministry of Forests, Lands, Natural Resource Operations and Rural Development said it is reviewing the study to determine if and how its findings could be applied to the province’s caribou recovery strategy. The ministry also said the recovery program is closely monitored to determine whether it’s meeting caribou recovery goals.

More immediate measures, such as maternity penning where pregnant caribou are protected by a fence as well as predator culling, are also part of the B.C. government’s strategy to protect threatened caribou.

Burton said it’s likely the province will have to pursue a predator cull, which is contentious, for a long time until caribou habitat recovers more fully.

“If we’re going to keep caribou around, we really do need to think about what vision are we going to keep them in,” said Burton.

“Are we going to put them in a little fenced area until we finish developing and restoring the landscape and just hope that they survive? Or are we going to have a vision where we have more substantial protection of their habitat?”

Brenna Owen, The Canadian Press

Like us on Facebook and follow us on Twitter.

Get local stories you won't find anywhere else right to your inbox.
Sign up here

Just Posted

Adrienne Rogers (LPN) and Tracy McConnell (RN) on the Victoria Hospice Unit. (Photo courtesy of Victoria Hospice)
Victoria Hospice bereavement counsellors dealing with a tsunami of grief

Last year, Victoria Hospice provided end-of-life care to more than 1,000 people

Paddles sit stacked and ready at a rowing regatta on Elk Lake in 2018. (Black Press Media file photo)
Greater Victoria junior girls rowing team nabs first in national Row to Tokyo challenge

Young Victoria City Rowing Club members row more than 2,250 km

Habitat Acquisition Trust has received provincial funding to help restore Garry oak ecosystems on southern Vancouver Island. (Photo by Jeremy da Silva)
Funding boosts restoration efforts for Vancouver Island’s Garry oak ecosystems

Habitat Acquisition Trust will take on several Garry oak ecosystem restoration projects

A Nexii roof panel is lifted during construction of a Starbucks in Abbotsford. Alexzi Building Solutions will be building a manufacturing plant in Langford or North Cowichan to produce the sustainable construction panels. (Photo courtesy of Alexzi Building Solutions)
Langford eyed for facility to make green building alternative to concrete

Langford, North Cowichan possible sites for plant to create sustainable construction panels

(The Canadian Press)
Trudeau won’t say whether Canada supports patent waiver for COVID-19 vaccines

‘Canada is at the table to help find a solution’

Edmonton Oilers’ Connor McDavid (97) celebrates his 100th point this season with Leon Draisaitl (29) against the Vancouver Canucks during second period NHL action in Edmonton on Saturday, May 8, 2021.THE CANADIAN PRESS/Jason Franson
Edmonton superstar McDavid hits 100-point mark as Oilers edge Canucks 4-3

NHL scoring leader needs just 53 games to reach century mark

Nuns of Mother Teresa’s Missionaries of Charity, carry some of her relics during a vigil of prayer in preparation for the canonization of Mother Teresa in the St. John in Latheran Basilica at the Vatican, Friday, Sept. 2, 2016. In which city did she do much of her charitable work? (AP Photo/Gregorio Borgia)
QUIZ: How much do you know about these motherhood issues?

In honour of Mother’s Day, take this 10-question quiz

A map showing where the most number of cases were recorded from April 23 to 29. This map, revealing a breakdown of infections by neighborhood, was pulled from a data package leaked to the Vancouver Sun last week (and independently verified).
36 Abbotsford schools flagged for COVID-19 exposures in the last 2 weeks, shattering record

Clearbrook Elementary recorded an ‘exposure’ on all 11 school days

Island Health has confirmed COVID-19 exposures at Ecole des Deux Mondes in Campbell River on May 4 and 5, and at Mill Bay Nature School in Mill Bay on April 28, 29, 30 and May 3. (Metro Creative photo)
Two new COVID-19 school exposures confirmed by Island Health

Health authority contacting anyone exposed at Ecole des Deux Mondes, Mill Bay Nature School

Canada’s chief public health officer is reminding Canadians even those who are fully vaccinated are not immune from transmitting the COVID-19. THE CANADIAN PRESS/Adrian Wyld
Canada’s top doctor warns full vaccination does not equal full protection from COVID-19

Post-inoculation, Theresa Tam says the risk of asymptomatic infection and transmission is far lower but not obsolete

The dash cam footage, taken May 7 at 8:18 a.m. belonged to the driver of a southbound vehicle that recently travelled out of the tunnel. (Reddit/Screen grab)
VIDEO: Dash cam captures dramatic rollover crash on Highway 99

Only one person sustained injuries from the collision, says B.C. Ambulance Services

Chevy stranded on a ledge above a rocky canyon at Mimi Falls near Logan Lake, April 28, 2021. (Photo credit: Margot Wikjord)
Police officer and fire chief team up in risky rescue of stranded dog near Logan Lake

Chevy, a rescue dog, needed rescuing again after getting stuck on a ledge above rocky canyon

Most Read