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.






Catoosa WMA To Stage Wildlife Inspection Check Points

Hunters planning to hunt at the TWRA Catoosa Wildlife management Area this season should be aware that wildlife officers may be staging several wildlife inspection checkpoints. Hunters passing through these checkpoints and their vehicles will be inspected for harvested animals, contraband, and illegal firearms and ammunition.   Hunters should stop at the area’s checking ... (click for more)

Fishing Report From The TWRA

Here is the fishing report from the TWRA: Dale Hollow: Fishing is slow. Water temperature is 80 degrees; water is falling. Bass: A few bass are being caught on shallow running crankbaits around shallow wood in the rivers. Crappie:   A few crappie re being caught on minnows around fallen trees. Bluegill: Several bluegill are being caught on crickets ... (click for more)

Man Charged With Killing 3-Year-Old Takes Own Life In County Jail

Justin Dale Bradley died in the Hamilton County jail Saturday morning. Notification was received from the Hamilton County 911 Center at   12:50 a.m. ,   regarding an inmate found unresponsive.   Jail personnel found the male inmate unresponsive in his cell and initiated C.P.R. while notifying Hamilton County Emergency Medical Services. ... (click for more)

Democratic Chairman Roy Herron Announces He Will Not Run For 2nd Term

Democratic Party Chairman Roy Herron announced Saturday at a meeting of the Tennessee Democratic Party State Executive Committee that he would not be seeking a second term as party chairman. “I have been blessed to serve as chairman these past two years, and I owe an enormous debt of gratitude to all of the executive committee members, party officials, staff members, and friends ... (click for more)

You’re Right With Lamar

One of Tennessee’s favorite sons, Davy Crockett, coined an oft-used phrase:  “Be always sure you’re right, then go ahead.” Being sure is quite important, but may be difficult in this election cycle. The Democratic nominee campaigning against Lamar Alexander is a man whose radio ads call for “change,” “fair” taxes and more jobs.  Sounds good, huh?   ... (click for more)

Roy Exum: The Saturday Funnies

Okay … here we go. A number of readers have complained that I haven’t shared any jokes that my friends send to my email address so on a weekend when our Volunteers and Mocs are idle, let’s laugh a little:   I was sitting in a bar one afternoon with an old friend knocking back a few beers when he said, "You know, if we're not careful we'll end up like those two old drunks ... (click for more)