Illinois Public Media News
Some bumblebee populations in the United States are dropping at an alarming rate, and University of Illinois researchers are investigating the potential causes.
There are 50 species of bumblebees in North America. Researchers examined eight of them, and discovered that in the last 20 years, half of the species declined in relative abundance by as much as 96 percent and experienced a reduction in geographic range by as much as 87 percent.
The researchers compared historical data from 73,000 museum records dating back to the late 1800s with recent U.S. national surveys of more than 16,000 specimens from about 400 sites.
U of I entomologist Sydney Cameron, the lead author of the three-year study, said the rate of decline marks an important finding because bumble bees play important roles in the country's food production.
"That certainly could impact the efficiency of our food production for many crops, such as cranberries, blueberries, tomatoes," Cameron said. "Bumble bees are especially good pollinators of these types of crops."
Cameron said the bumblebees with significant population declines have a lower genetic diversity than bumblebees with healthier populations. She also said it has been hypothesized that North American queen bees may have brought a parasite, known as Nosema bombi, back to the United States from Europe after being raised in the rearing facilities of native bumble bees. However, she said it is unknown if these factors contributed to some species dying out.
"No one's pointing a finger at anyone," she said. "We're just trying to figure out where the Nosema that we're finding in our North American bees came from."
Scientists last year looked at another phenomenon affecting honeybees called "colony collapse" in which large numbers of a hive's worker bees disappear. Research suggests a fungus and virus may be to blame.
The reason for the population decline among the honeybees is still being determined. It may have something to do with climate change, disease, or even low genetic diversity, according to some researchers. But Cameron noted that it is too early to jump to any conclusions.
The report was published in the Proceedings of the National Academy of Sciences.
(Photo courtesy of Johanna James-Heinz)
An Indiana University faculty member says he has learned to accept that earthquakes can take place in unexpected places.
But Geological Sciences Professor Michael Hamburger said there is a little known 10-mile area in Central Indiana called the Sharpsville fault, and believes that is where Thursday morning's magnitude 3.8 quake originated. The tremor located just north of Indianapolis was felt in four other states, including Illinois, but there were no injuries and very little damage was reported. Hamburger said pinpointing a source for the quake will take some time.
"One of the distinct problems is that earthquakes tend to happen fairly deep in the earth's crust, and the fractures that we see at the surface are quite superficial," Hamburger said. "They're mostly in sedimentary layers and we really need to do some imaging of the deeper architecture of the earth's crust in order to figure our what are the structures that are causing these earthquakes."
Hamburger said earthquakes in isolated places are not that unusual, and they are felt over a large area, citing the magnitude 5.2 Wabash Valley quake from April of 2008, when Illinois and at least 16 other states felt the impact. The majority of heavy activity comes from the Wabash Valley and New Madrid Seismic Zones.
Hamburger said he has heard only minor damage reports coming out of Indiana, including some of cracked pavement, but no structural damage. Despite the lack of earthquakes in Indiana, Hamburger said there are quake-resistant design codes for all of the state's public buildings.
Type 2 diabetes - the kind related to obesity and an unhealthy diet - gets a lot of attention these days. But there's another, less common, form of the disease - type 1 - that can also lead to life-threatening complications. Reporter Véronique LaCapra went behind the scenes at a St. Louis hospital, for the transplant operation that got one woman off dialysis, and made her diabetes-free.
(Photo by Véronique LaCapra)
A misconception about African elephants can be put to rest.
Researchers from the University of Illinois, Harvard University, and the University of York discovered that there are actually two species of African elephants, rather than one. The DNA of African elephants was compared with the extinct American mastodon and wooly mammoth.
"Experimentally, we had a major challenge to extract DNA sequences from two fossils - mammoths and mastodons - and line them up with DNA from modern elephants over hundreds of sections of the genome," said research scientist Nadin Rohland of the Department of Genetics at the Harvard Medical School.
African forest elephants are smaller, but have a greater genetic diversity compared to African savanna elephants, according to University of Illinois animal sciences professor Alfred Roca. Roca said the African forest elephants make up about one tenth of the country's elephant population. He said these mammals could face extinction unless there is more of a concentration dedicated to preserving their existence.
"In the forest of Central Africa and certainly in the forest of West Africa, the protection is limited in some countries, and in many cases you have a lot of organized gangs of poachers that are coming in," Roca said. "Really the focus has to be on protecting the forest elephant."
Roca said the evolutionary differences between the mammals are about as old as the split between humans and chimpanzees. He added that it is likely climate change in Africa five million years ago led to their creation.
This research was funded by the Max Planck Society and by a Burroughs Wellcome Career Development Award in Biomedical Science.
(Photo courtesy of Mark Turner/flickr)
The National Institutes of Health and the Environmental Protection Agency have awarded $2 million to the University of Illinois at Urbana-Champaign. The grant will be used to create a new research center to study how exposure to common chemicals may affect childhood development.
Center director neurotoxicologist Susan Schantz said studies will focus on bisphenol A (BPA), which is widely used in plastics, and phthalates, which are components of many scented personal care products, like lotions and shampoos.
"We know from laboratory animal studies that both of these chemicals are endocrine disrupters," Schantz said, "so they can mess with certain hormonal systems in the body."
One study will involve pregnant women volunteers from local health clinics. "We're going to follow their health and take urine samples during their pregnancy so we can assess their exposure to the two chemicals, and then from the time their babies are born we're going to follow them developmentally," Schantz explained.
A related study at Harvard University will examine how exposure to BPA and phthalates relates to cognitive development in adolescents.
Once a year for the last 20 years, a park in Champaign becomes a kind of launching pad.
This year, the Great Annual Rocket Launch takes on the theme of 'The Year We Make Contact' - since it is 2010. Awards will include best Science Fiction or Fantasy Rocket and Best Flying Saucer Flight.
Jonathan Sivier with the group Central Illinois Aerospace says there's no telling how complex some of the amateur spacecraft will be. But he says there could be a wide variety of designs this year. "Some things that look like something from a movie or TV show or something like that." said Sivier. "We have a secondary theme of flying saucers, and then every year we have - 'what's the most impressive flight of the day?' 'what's best the best looking rocket of the day?'... it's all very arbitrary." Sivier says the projects vary, but adds he's amazed what some can do compared to when the group started in the early 90's. "There are some little bitty video cameras that are very tiny, but get really good results from their rockets," said Sivier. "And the variety of motors that are available for rockets these days is quite wide."
Sivier and some friends started Central Illinois Aerospace when they were students at Mahomet-Seymour High School. It now has more than 40 regular members, but he says many more come out for the annual rocket launch. It's from 10 to 4 Saturday in Dodds Park, and includes a potluck dinner.
A former administrator and researcher at Carle Foundation Hospital has settled her lawsuit against the Urbana firm.
Suzanne Stratton was Carle's vice president for research and had worked on breast cancer at the hospital's Cancer Center before she was fired in November of 2008.
Stratton charged that Carle had violated federal whistleblower laws by retaliating against her. Stratton had brought up allegations that Carle violated laws protecting human research subjects in its cancer studies.
Last week a federal judge approved both sides' agreement to settle the lawsuit with prejudice - that means Stratton won't be able to file another case on the same claim.
Carle spokeswoman Jennifer Hendricks Kauffman would not disclose any other terms of the agreement - in the suit, Stratton had sought to be reinstated and receive financial damages. Neither Stratton nor her attorney could be reached for comment.
A group monitoring animal research at the University of Illinois' Division of Animal Resources says some of them have become very ill, and one has died as a result of negligence.
The executive director of "Stop Animal Exploitation Now," Michael Budkie, says such a problem isn't unique to the U of I, noting that animals have died at 30 other research facilities around the country in the last few years. Citing reports obtained from the USDA, Budkie claims the U of I uses a large number of animals in painful projects without the benefit of anesthesia. In another instance, he says the university failed to report severe illnesses to federal authorities for a year, and that the principal investigator lost the records in that time.
"If a researcher can have severe illnesses come up with the animals and no one knows about it, and he or she does not bother to report it for a year, that indicates very clearly that the supervisory mechanisms for handling animals research at the University of Illinois-Urbana aren't functioning properly," Budkie contended.
While the reports don't cite specific animals, Budkie says similar work elsewhere involved chinchillas.
U of I Spokeswoman Robin Kaler says these are all isolated incidents that have been reported to the USDA, and that the process to identify problems keeps them from happening again. She says one of the animals died when it was mistakenly administered a glucose tolerance test in diabetes research. Kaler says it was euthanized when attempts to revive the animal were unsuccessful. She cites another case involving a formula to ensure the health growth of piglets, which were moved shortly after researchers realize they had outgrown their cages.
The University of Illinois and Urbana's Carle Foundation Hospital have cooperated on research in the past - but a new agreement is meant to elevate that cooperation by a few notches.
The U of I and Carle have launched a biomedical research alliance, with the university sharing space with Carle researchers in the Mills Breast Cancer Institute. The joint agreement will focus on four research areas: cancer, cardiology, neurosciences and gastrointestinal health.
Carle CEO Dr. James Leonard says the agreement will foster new communication between doctors on both sides.
"That may sound like well, 'didn't that go on all the time before'. and the answer is no", says Leonard. "We're both big institutions and we both focused on what we did. and this allows us to meet not at that interface."
Leonard hopes the research alliance will bring new medical advancements closer to patients and help attract physicians who want to practice and do research at the same time.
People from Wisconsin down to Missouri reported seeing a meteor that lit up the midwestern sky Wednesday night. It appeared a little past 10 PM.
At exactly that moment, Steve Baron was in the window seat of a Southwest Airlines jet flying from Las Vegas to Chicago. Suddenly, he saw a flash he describes as "impossibly bright."
"Like if you lit magnesium on fire", Baron explained. "It was like daylight outside, only it was the brightest day you've ever seen."
Baron, a vice president at Chicago-based Local TV L-L-C, is a former broadcast meteorologist. But this didn't look like any weather event Baron had ever seen.
Baron said he wonders, "Is it, like, a missile or something? Are we flying over a bombing range? Then it dawned on me that it had to be coming from outer space."
Scientists say he's probably right. The object is presumed to be a meteor entering the earth's atmosphere, or possibly, a piece of space junk.
Andy Ervin is a senior meteorologist with the National Weather Service in the Quad Cities. He says the object was a meteor, "certainly the brightest meteor I've ever seen". Ervin says most eyewitnesses the Weather Service has talked to say it was "exceptionally bright or probably the brightest thing most folks have seen in the sky beyond lightning or the sun".
Forecasters say a meteor shower called Gamma Virginids began April 4 and is expected to last to April 21 with peak activity Wednesday and Thursday. But they couldn't immediately confirm if the Midwest meteor was part of that shower.
(Additional reporting from the Associated Press)
Page 13 of 15 pages ‹ First < 11 12 13 14 15 >