(The Canadian Press)

(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

(Pixabay photo)
Morning Start: Kentucky has more bourbon than people

Your morning start for Thursday, May 6, 2021

(James Holmes/Contributed)
Kelowna chef to compete on the Food Network’s Fire Masters

Chef James Holmes will compete for $10K on an upcoming episode of Fire Masters

A woman wears a face mask and shield to curb the spread of COVID-19 while walking in North Vancouver, B.C., on Wednesday, January 6, 2021. THE CANADIAN PRESS/Darryl Dyck
57 new cases of COVID-19 in Interior Health region

Thirty people in the region are in hospital, 16 of whom are in intensive care

Fernando’s Pub is set to reopen on May 17 following a lengthy winter closure, allowing Kelowna residents to again enjoy the pub’s famed avocado margarita. (Fernando’s Pub/Facebook)
Downtown Kelowna’s Fernando’s Pub set to reopen after winter closure

Fernando’s has announced it will begin welcoming its patrons back on May 17

Jose Marchand prepares Pfizer COVID-19 vaccination doses at a mobile clinic for members of First Nations and their partners, in Montreal, Friday, April 30, 2021. THE CANADIAN PRESS/Ryan Remiorz
Approximately 2,500 teachers, school staff vaccinated in Central Okanagan

Central Okanagan Teachers’ Association said teachers are thrilled

Protesters attempt to stop clear-cutting of old-growth trees in Fairy Creek near Port Renfrew. (Will O���Connell photo)
VIDEO: Workers, activists clash at site of Vancouver Island logging operation

Forest license holders asking for independent investigation into incident

A man who allegedly spat at and yelled racial slurs at an Asian family was arrested for hate-motivated assault Tuesday. (Black Press Media file photo)
Arrest made after man spits, yells anti-Asian racial slurs at Victoria mom and kids

The man was arrested for hate-motivated assault near Quadra Elementary School Tuesday

A lady wears a vaccinated sticker after receiving a COVID-19 vaccine at a vaccination clinic run by Vancouver Coastal Health, in Richmond, B.C., Saturday, April 10, 2021. THE CANADIAN PRESS/Jonathan Hayward
Canada may find it challenging to reach herd immunity from COVID-19, experts say

Level of immunity among the population changes with the variants, especially the more transmissible strains

B.C.’s provincial health officer, Dr. Bonnie Henry. THE CANADIAN PRESS/Jonathan Hayward
Dip in COVID-19 cases with 572 newly announced in B.C.

No new deaths have been reported but hospitalized patients are up to 481, with 161 being treated in intensive care

(Kingfisher Boats photo)
In the market for a boat in the North Okanagan? Be prepared to wait

Vernon’s Kingfisher Boats is out of 2021 models, with many 2022 models already pre-sold

Solar panels on a parking garage at the University of B.C. will be used to separate water into oxygen and hydrogen, the latter captured to supply a vehicle filling station. (UBC video)
UBC parkade project to use solar energy for hydrogen vehicles

Demonstration project gets $5.6M in low-carbon fuel credits

Cannabis bought in British Columbia (Ashley Wadhwani/Black Press Media)
Is it time to start thinking about greener ways to package cannabis?

Packaging suppliers are still figuring eco-friendly and affordable packaging options that fit the mandates of Cannabis Regulations

FILE – A student arrives at school as teachers dressed in red participate in a solidarity march to raise awareness about cases of COVID-19 at Ecole Woodward Hill Elementary School, in Surrey, B.C., on Tuesday, February 23, 2021. THE CANADIAN PRESS/Darryl Dyck
B.C. ‘should be able to’ offer 1st dose of COVID vaccine to kids 12+ by end of June: Henry

Health Canada authorized the vaccine for younger teens this morning

Most Read