Research From NC State Shows Bee Biodiversity Boosts Blueberry Crop Yields

Monday, May 12, 2014

Research from North Carolina State University shows that blueberries produce more seeds and larger berries if they are visited by more diverse bee species, allowing farmers to harvest significantly more pounds of fruit per acre.

“We wanted to understand the functional role of diversity,” says Dr. Hannah Burrack, an associate professor of entomology at NC State and co-author of a paper on the research. “And we found that there is a quantifiable benefit of having a lot of different types of bees pollinating a crop.

The researchers looked at blueberries in North Carolina because it is an economically important and well understood crop that relies on insect pollination.

Within the blueberry fields, the researchers identified five distinct groups of bee species: honey bees, bumble bees, southeastern blueberry bees, carpenter bees and a functionally similar collection of species that they termed small native bees.

The researchers found that for each group above one, farmers saw an increase of $311 worth of yield per acre. For example, if two bee groups pollinated a field, the boost would be $311 per acre; for three bee groups, the boost would be $622 per acre, and so on.

“For North Carolina blueberries as a whole, we calculate the benefit of each group to be approximately $1.42 million worth of yield each year,” Dr. Burrack says.

“We think the benefit stems from differences in behavior between bee groups, in part depending on the weather,” explains Dr. David Tarpy, an associate professor of entomology at NC State and co-author of the paper. For example, southeastern blueberry bees work well regardless of inclement weather, whereas honey bees only perform at their best on calm, warm, sunny days.

“This can make a big difference, since blueberries bloom in March and April in North Carolina,” Dr. Burrack says. “That means the weather can swing from great to awful, as we saw this year.”

There is some research showing that having native, flowering plants near blueberry fields can increase native bee populations over time, but the researchers are now planning to see what role crop management can play in fostering bee diversity at crop sites.

“We’ve shown that there is a real financial benefit associated with biodiversity,” Dr. Burrack says. “The next step is to figure out how to foster that diversity in practical terms.”

The paper, “Bee species diversity enhances productivity and stability in a perennial crop,” was published May 9 in the open-access journal PLOS ONE. Lead author of the paper is Shelley Rogers, a former graduate student at NC State who received an NSF Graduate Research Fellowship to support this work.






TWRA Leasing Fields For 2016 Dove Season

The Tennessee Wildlife Resources Agency is seeking fields to lease for the upcoming 2016 dove season. The first segment of dove season opens at noon on Thursday, Sept. 1. According to officials, mourning doves are a popular game bird and one of the most widely distributed and abundant birds in North America. More mourning doves are harvested than all other migratory bird species ... (click for more)

5th Permit For 2016 Elk Hunt To Be Auctioned On eBay, July 28-Aug.7

The fifth permit for participation in Tennessee’s eighth managed elk hunt will be awarded to the successful bidder in an eBay auction to be held from July 28-Aug 7. Proceeds from the auction benefit the state’s elk restoration program. Since the elk hunt was implemented in 2009, the Tennessee Wildlife Resources Agency has donated a permit to a Non-Governmental Organization ... (click for more)

Man, 28, Shot And Killed In East Chattanooga

A 28-year-old man was shot and killed in East Chattanooga early Friday morning. The victim was identified as Jeremy Clark, a brother of House candidate Dennis Clark. Dennis Clark said, "Jeremy, a beloved son, my younger brother and dear friend to many, was taken from us too soon. The pain from our sudden and tragic loss is Indescribable. He was a compassionate and fun-loving ... (click for more)

Michael Ford Sentenced To More Than 13 Years In Prison On Drug Charges

Michael Shawn Ford has been sentenced to 13 and a half years in prison on drug charges. On April 20, 2105, Ford was arrested at his house in East Ridge. Police found him hiding in the closet with a laundry bag which contained a loaded pistol and 7.9 grams of crystal meth. Officers said that two backpacks were found in the same bedroom, one with 257.3 grams of crystal meth ... (click for more)

Olympic Events On The Ocoee River Made History – But It Wasn’t Easy

It started with a simple “what if” question while Atlanta officials were working on a bid to host the 1996 Summer Olympic Games.  A group of amateur kayakers from the city began asking themselves: “What if Atlanta’s bid is successful? Then where would the Olympic whitewater canoe and kayak races be held?”  To some of the members of that group, the answer was obvious. ... (click for more)

Roy Exum: Don’t Kick A Man’s Neck

From the minute my brothers and I each became cognizant, my dad started teaching us the rules of becoming a man. Dad was from deep in Mississippi and he’d been taught a lot of life’s secrets from his father. These lessons have been passed for generations and, the older I have become, I’m convinced a lot of them were borne from The Sermon on the Mount. Our favorite, back in the ... (click for more)