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.






Fishing Report From The TRWA

Here is the fishing report from the TWRA: Chickamauga Reservoir:  Reservoir Conditions: Summer normal elevation: 682.0 feet. Winter normal elevation: 676.0 feet. Current elevation: 681.0 feet. The water surface temperature is 62 degrees. Largemouth Bass: Grass mats and grass edges along large flats seem to be better than other areas. Frogs, buzzbaits, plastic ... (click for more)

2015-16 Sport Fish Regulations To Be Set During October Commission Meeting

The Tennessee Fish and Wildlife Commission will establish the 2015-16 sport fish regulations during its October meeting. The meeting will be held in Greeneville on Wednesday-Thursday, at the General Morgan Inn.  The Tennessee Wildlife Resources Agency Fisheries Division presented changes in the sport fish proclamation during a preview at the August TFWC meeting. The proposals ... (click for more)

Additions And Improvements At Camp Jordan Arena Coming Soon

Additions and improvements are coming to Camp Jordan Arena in the near future. At the Thursday night meeting of the East Ridge city council, approval was given for buying new playground equipment. It will come from Gametime, a locally-based company. The VP of Marketing lives in East Ridge and made a proposal to set up the playground at Camp Jordan so his company could use it for ... (click for more)

Teenager Killed In ATV Accident Thursday Night

Damon Lee Jones, 15, was killed Thursday night in an ATV accident in Walker County. It was reported he was riding with a 17-year old, when they tried to enter a church parking lot, but ran into a cable barrier. The accident happened on Dunwoody Road in LaFayette. The other rider, identified as Timothy J. Wallin, was not injured.   (click for more)

Tom Dugan Was A Good Man

Tom was my boss for most of my 36 years at Carta.  At the ceremony where I was awarded my 30-year service award, Tom said, "Don disagrees with 85% of my decisions, but I wish I had 80 more employees just like him." This kind of indicates our relationship. When I asked him to help with my plans for a reunion for the group of Veterans that I served with in Vietnam, he quickly ... (click for more)

Roy Exum: A Veterinarian’s Horse Sense

I suspect you’ve heard by now that a doctor in New York City, who volunteers with “Doctors Without Borders,” just got back from the African nation of Guinea on October 17 – last Friday – and on Thursday tested positive for the deadly Ebola virus. Luckily, he came in actual contact with only a few people but he reportedly rode a subway, took a taxi, went on a three-mile run and ... (click for more)