Agriculture
Got Milk? How?
Silk’s superpowers
Seeds of the Future
Amphibians
Bullfrogs
Salamanders and Newts
Tree Frogs
Animals
Sleep Affects a Bird's Singing
Sea Giants and Island Pygmies
New Monkey Business
Behavior
Flower family knows its roots
Swedish Rhapsody
The Other Side of the Zoo Fence
Birds
Roadrunners
Mockingbirds
Nightingales
Chemistry and Materials
Smelly Traps for Lampreys
These gems make their own way
Meteorites may have sparked life on Earth
Computers
Games with a Purpose
Music of the Future
A Light Delay
Dinosaurs and Fossils
Have shell, will travel
Dino-bite!
Fingerprinting Fossils
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Earth
Ice Age Melting and Rising Seas
Pollution at the ends of the Earth
Easy Ways to Conserve Water
Environment
Indoor ozone stopper
A Change in Climate
The Oily Gulf
Finding the Past
If Only Bones Could Speak
Early Maya Writing
Of Lice and Old Clothes
Fish
Skates and Rays
Nurse Sharks
Hagfish
Food and Nutrition
Yummy bugs
In Search of the Perfect French Fry
Symbols from the Stone Age
GSAT English Rules
Capitalization Rules
Who vs. That vs. Which
Finding Subjects and Verbs
GSAT Exam Preparation Jamaica
GSAT stars reap scholarship glory
GSAT Exam Preparation
Preparing for the GSAT Exam
GSAT Exams Jamaica Scholarships
Results of GSAT are in schools this week
Access denied - Disabled boy aces GSAT
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
Monkeys Count
It's a Math World for Animals
A Sweet Advance in Candy Packing
Human Body
Disease Detectives
Music in the Brain
What the appendix is good for
Invertebrates
Corals
Roundworms
Clams
Mammals
German Shepherds
African Warthogs
Bloodhounds
Parents
Choosing a Preschool: What to Consider
How children learn
Raise a Lifelong Reader by Reading Aloud
Physics
IceCube Science
Hold on to your stars, ladies and gentlemen
Invisibility Ring
Plants
Fungus Hunt
Fast-flying fungal spores
Seeds of the Future
Reptiles
Garter Snakes
Alligators
Snapping Turtles
Space and Astronomy
Phantom Energy and the Big Rip
A Family in Space
A Dusty Birthplace
Technology and Engineering
A Clean Getaway
Roll-Up Computer Monitors to Go
Beyond Bar Codes
The Parts of Speech
Adjectives and Adverbs
What is a Verb?
Problems with Prepositions
Transportation
Are Propellers Fin-ished?
Reach for the Sky
Where rivers run uphill
Weather
A Change in Climate
Antarctica warms, which threatens penguins
Recipe for a Hurricane
Add your Article

Where Have All the Bees Gone?

 

Entomologists—scientists who study insects—have a real mystery on their hands. All across the country, honeybees are leaving their hives and never returning.

It doesn’t take long before a hive is nearly empty. Researchers call this phenomenon colony-collapse disorder. According to surveys of beekeepers across the country, 25 to 40 percent of the honeybees in the United States have vanished from their hives since last fall. So far, no one can explain why.

Colony collapse is a serious concern because bees play an important role in the production of about one-third of the foods we eat, including apples, watermelons, and almonds. As they feed, honeybees spread pollen from flower to flower. Without this process, called pollination, a plant can’t produce seeds or fruits.

Now, a group of scientists and beekeepers has teamed up to try to figure out what’s causing the alarming collapse of so many colonies. By sharing their expertise in honeybee behavior, health, and nutrition, team members hope to find out what’s contributing to the decline and to prevent bee disappearances in the future.

Sick bees?

It could be that disease is causing the disappearance of the bees. To explore that possibility, Jay Evans, a research entomologist at the United States Department of Agriculture (USDA) Bee Research Laboratory, examines bees taken from colonies that are collapsing. “We know what a healthy bee should look like on the inside, and we can look for physical signs of disease,” he says.

And bees from collapsing colonies don’t look very healthy. “Their stomachs are worn down, compared to the stomachs of healthy bees,” Evans says. It may be that a parasite is damaging the bees’ digestive organs. The bees’ inability to ward off such parasites suggests that their immune systems may not be working as they should.

The honeybees have other signs of troubled immune systems, such as high levels of bacteria and fungi inside their bodies, says Dewey Caron, an entomologist at the University of Delaware. He’s one of the leaders of the colony-collapse research team.

But why would parasites, bacteria, or fungi in the body cause bees to leave their hives? After all, when you’re sick, you want to stay at home, right?

Caron says that some of these disease-causing agents may lead to disturbances in bee behavior. “It may be that sick bees are not processing information correctly and learning where home is,” he says. In other words, a sick bee might leave the hive and simply forget how to get back.

If enough of the bees in a colony can’t find their way home, he says, it’s just a matter of time before the colony collapses. Being social insects, even healthy bees are unable to live long on their own. And once the bees vanish, the crops that they usually pollinate are in trouble.

Environmental clues

Another cause of colony-collapse disorder may be certain chemicals that farmers apply to kill unwanted insects on crops, says Jerry Hayes, chief bee inspector for the Florida Department of Agriculture. Some studies, he says, suggest that a certain type of insecticide affects the honeybee’s nervous system (which includes the brain) and memory. “It seems like honeybees are going out and getting confused about where to go and what to do,” he says.

Adding to the mystery, Hayes says, is an observation about moths and other insects that frequently use empty beehives to raise their own young.

“Usually, they move right into an empty hive,” he says, “but now they’re waiting several weeks before they do.” As Hayes sees it, this suggests that something repellent in the hive may not only be driving out bees but also keeping other insects from moving in, he says. So far, scientists haven’t identified what that repellent thing could be.

Looking at bee genes

If it turns out that a disease is contributing to colony collapse, bees’ genes could explain why some colonies have collapsed and others have not. In any group of bees—or other animals, including people—there are many different kinds of genes, because each individual has a slightly different unique set of genes. The more different genes a group has, the higher the group’s genetic diversity. And genetic diversity is a plus as far as survival is concerned.

Some scientists are now studying genetic diversity in honeybee colonies to see if it has an effect on colony collapse disorder.

“If a colony is genetically diverse, it’s less likely the colony will be wiped out completely from a sweeping infection or disease,” says David Tarpy, a University of North Carolina entomologist. That’s because at least some bees in a genetically diverse group are likely to have genes that help them resist any specific disease that gets into the colony, he says. Scientists haven’t determined the role of genetic diversity in colony collapse, but it’s a promising theory, says Evans. He and his colleagues at the USDA bee lab are currently running genetic tests on bees from collapsing colonies. Their goal is to find out whether there are genetic differences between the bees that vanish and those that remain in their hives.

Scientists are working hard to figure out the causes of colony collapse. Meanwhile, bees continue to disappear. Can anything be done to help them survive?

Tarpy suggests that more people could raise bees to help restore their numbers. “Given this decline in honeybees, if you want to get active in helping to promote pollination, the best thing to do is to become a beekeeper and keep your own bees,” he says.

Don’t be put off by the possibility of a sting, says Dan Geer, who raises bees in North Smithfield, Rhode Island. First of all, beekeepers can wear protective gear. And bees, he says, have a bad rep. “You’d be surprised by how gentle they are,” he says.

Where Have All the Bees Gone?
Where Have All the Bees Gone?








Designed and Powered by HBJamaica.com™