(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

Victoria police will be making numerous arrests throughout the day Jan. 27 as part of its #VicPDWarrantWednesday project. (Nina Grossman/News Staff)
Numerous arrests today part of Victoria police #WarrantWednesday project

VicPD says arrests part of warrant enforcement project

Victoria police are seeking a young woman suspected of spitting on a bus driver in October 2020. (Courtesy of Victoria Police Department)
Young woman sought after ‘spitting assault’ on Victoria bus driver

Suspect became irate after bus came to a sudden stop

Police are warning people of flu shot and vaccination frauds. (Black Press Media file photo)
Flu shot fraud charges West Shore resident for non-existent appointments

Fraudulent email claimed to be from London Drugs

Leila Bui with her parents Tuan (left) and Kairry Nguyen on Jan. 27, 2020 after Tenessa Nikirk was found guilty for striking Bui in a Saanich crosswalk. (Nina Grossman/News Staff)
Driver convicted of dangerous driving after hitting Leila Bui out on bail

Tennesa Nikirk was convicted for striking then 11-year-old Leila Bui with her car

A Cessna 170 airplane similar to the one pictured above is reported to be missing off the waters between Victoria and Washington State. Twitter photo/USCG
UPDATE: No sign of small plane that went down in Juan de Fuca Strait

Searchers out on both sides of border between Victoria and Port Angeles

(Twitter/Ateachersaurus)
The Pachena Bay shoreline in 2013. (Twitter/Ateachersaurus)
This week in history: 9.0 magnitude quake struck under what is now called Vancouver Island

According to First Nations elders, the 9.0-magnitude quake in 1700 CE kick-started a tsunami

B.C. Premier John Horgan speaks at B.C. legislature on the province’s mass vaccination plan for COVID-19, Jan. 22, 2021. (B.C. government)
COVID-19 quarantine not an option for B.C., John Horgan says

Apres-ski parties increase risk, not interprovincial travel

Worker at Swartz Bay terminal on Monday, January 20, 2020. (THE CANADIAN PRESS/Chad Hipolito)
Former BC Ferries employee alleges he was fired because of his race

Imraan Goondiwala has been granted a BC Human Rights Tribunal hearing

An Island Health graph showing COVID-19 cases in the central Island by local health area between Dec. 27 and Jan. 23. (Island Health image)
Central Island’s COVID-19 case spike shifting, says Island Health

Cowichan Valley has seen the highest number of cases, but Nanaimo and south Island seeing upticks

Rodney and Ekaterina Baker have been ticketed and charged under the Yukon’s Civil Emergency Measures Act for breaking isolation requirements in order to sneak into a vaccine clinic and receive Moderna vaccine doses in Beaver Creek. (Facebook/Submitted)
B.C. couple who travelled to Yukon for COVID vaccine ineligible for 2nd dose until summer

The province is ensuring those eligible to receive the vaccine get the second shot within 42 days

(File)
Mask dispute in court leaves Vancouver cop with broken leg

Man allegedly refused to put on a mask and resisted arrest

(Kraft Dinner/Twitter)
Kraft Dinner launches candy-flavoured mac and cheese just in time for Valentine’s Day

Sweet and cheesy treat will be here just in time for the cheesiest holiday of the year

Extensive water on No. 4 and 5 at the Mount Brenton Golf Course following heavy rains earlier this month. (Photo submitted)
Island golf course does a booming business in 2020

A total of 15,000 more rounds played than the previous year at Mount Brenton

Most Read