(The Canadian Press)

Lack of bees, pollination limiting crop yields across U.S., B.C., study finds

Blueberry crops in B.C. were among those most affected by limited pollination

A lack of wild bees and managed honey bees is limiting pollination and yields for certain crops on farms in British Columbia and across the United States, a collective of researchers has found.

Their study published Tuesday in the Royal Society’s journal Biological Sciences used data from more than 130 farms to assess the pollination of crop flowers and yield for apples, highbush blueberries, sweet and tart cherries, almonds, pumpkins and watermelon.

Of those crops, the study found five frequently showed evidence of pollinator limitation, suggesting that the protection of wild bees and greater investment in honey bee colonies is likely to boost yields.

It notes that crops dependent on pollinators generate more than US$50 billion each year in the United States and declining bee populations raise concerns about food security in years to come.

The researchers collaborated to gain a “comprehensive understanding of our reliance on a lot of these pollinators for these really vitamin rich, nutritionally rich foods,” said Kyle Bobiwash, a co-author and assistant professor in the department of entomology at the University of Manitoba.

Blueberry crops in B.C. were among those most affected by limited pollination, said Bobiwash.

On some farms, he said, “there was a tremendous amount of pollen limitation, meaning there were a lot of flowers not actually getting pollinated sufficiently to set fruit.”

But the results varied by farm, said Bobiwash, noting he was involved in earlier research that showed some farms where crops had better pollination boosted yields by as much as 30 per cent.

“It amounted to thousands and thousands of dollars per acre, just because they had slightly better bee populations than other farms.”

Better pollination can also produce heavier, more juicy and likely tastier berries, he said.

“If you have a lot of pollen and you’re setting a lot more seed, you really invigorate this berry and you get all those biochemical processes happening. So, it’s going to gain more water (and) sugar, it’s going to produce more secondary metabolites, which are the little flavour compounds.”

Global demand for crops that are dependent on pollinators has increased, said Bobiwash, while the development of those crops often cuts into bee habitat.

At the same time, he said, climate change could affect the close relationship between plants and pollinators.

“As temperatures warm, plants might respond by blooming earlier (and) bees might respond by emerging earlier. But that’s not guaranteed,” said Bobiwash.

“We might have a plant blooming before the pollinators it evolved with emerge.”

Increasing pollination and crop yield isn’t as simple as bringing more honey bees to every farm, said Bobiwash. While the study showed different bees provided comparable amounts of pollination for most crops, he said some responded best to honey bees, such as almonds in California, and others benefited most from wild bees.

The results of the study point to the importance of protecting and enhancing habitat for wild bees, which could include wildflowers and certain weeds that farmers would normally remove, he said.

Brenna Owen, The Canadian Press

Like us on Facebook and follow us on Twitter.

Want to support local journalism? Make a donation here.

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

Just Posted

Arts council hopeful that Winter Arts and Crafts Fair will go ahead

The 100 Mile and District Arts Council is looking at gaming grants and other funding options in the event it has to cancel the annual South Cariboo Winter Arts and Crafts Fair due to COVID-19.

Newcomers welcome in the 108

When newcomers move to 108 Mile Ranch, Bev French is ready to welcome them.

Centennial Park fully reopened for the public

The fence has been taken down and residents now have free run of the park

Drive-thru fundraiser wrangles $2,000

Another event is planned for Sept. 7

SD27 prepares for ‘full return’ to schools

As the clock ticks down to September, a new poll suggests many Canadian parents are on the fence about whether to send their kids to school if and when classrooms are reopened.

53 new COVID-19 cases, no new deaths cap off week of high infection rates in B.C.

Roughly 1,500 people are self-isolating because they either have COVID-19 or have been exposed to it

Moving on: Tanev scores 11 seconds into OT as Canucks oust Wild

Vancouver beats Minnesota 5-4 to move into first round of NHL playoffs

Gene editing debate takes root with organic broccoli, new UBC research shows

Broccoli is one of the best-known vegetables with origins in this scientific haze

VIDEO: U.S. Air Force pilot does fly-by for B.C. son amid COVID border separation

Sky-high father-son visit plays out over White Rock Pier

3 Vancouver police officers test positive for COVID after responding to large party

Union president says other officers are self-isolating due to possible exposure

New mothers with COVID-19 should still breastfeed: Canada’s top doctor

Dr. Theresa Tam made the recommendation during World Breastfeeding Awareness Week

Collapse of Nunavut ice shelf ‘like losing a good friend:’ glaciologist

The ice shelf on the northwestern edge of Ellesmere Island has shrunk 43 per cent

B.C. wildfire crews have battled 111 blazes in the last seven days

Twenty-nine fires remain active, as of Friday (Aug 7)

B.C. group renews call for protection of newly discovered glass sponge reefs

DFO says public consultation will play heavy role in future protection measures

Most Read