(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

Province, feds, Wet’suwet’en announce progress in MOU talks

Community engagement process launched to implement northern B.C. First Nation’s rights and title

Dogs are matched with the person, not the person matched to the dog – Prince Rupert SPCA

Prince Rupert SPCA does their due diligence in adopting dogs to suitable human companions

Photo Gallery: Memorial totem pole raising in Prince Rupert

The memorial pole stands in memory of Prince Rupert carvers mother on Second Ave. West

Province, feds, Wet’suwet’en announce progress in MOU talks

External community engagement process launched to help implement Wet’suwet’en rights and title

Memorial totem pole raised in Prince Rupert

The memorial pole was a two year project led by local carver Lyle Campbell

STANDING TALL: Forestry workers meet the challenges, remain hopeful

A look at the forest sector in B.C. – and those hoping for the best – amid mill curtailments

Man suffers serious injuries in bear attack in remote area near Lillooet

It was deemed a defensive attack, no efforts were made to locate the animal

Parkinson SuperWalk goes virtual throughout B.C. due to COVID-19

People encouraged to walk around their neighbourhood, along community trails, through parks, forests

Missed rent payments ‘cause of COVID-19? You have until July 2021 to pay up

Each monthly instalment must be paid on the same date the rent is due

U.S.-Canada pandemic border restrictions extended into September

‘We will continue to keep our communities safe,’ says Public Safety Minister Bill Blair

578 British Columbians currently infected with COVID-19

Seventy-eight new cases confirmed in past 24 hours

WE Charity registers as lobbyist, lays off staff, looking to sell real estate

WE Charity said its financial position has been greatly affected by the COVID-19 pandemic

Conservation seizes fawn illegally kept captive in Vancouver Island home

A Comox Valley resident charged and fined under the Wildlife Act

Pandemic could be driving more parents to get on board with flu shot: study

University of B.C. study gauges willingness for parents to vaccinate children for influenza

Most Read