Sentences with phrase «study wild bee»

He was also a visiting research fellow at the University of São Paulo in Brazil, visiting in 1998 to study pollinator ecology, which included different species of bees and hoverflies, and again in 2003 to study wild bee ecology.

Not exact matches

A promising study published last autumn by ecologists Sarah Greenleaf of the University of California at Davis and Claire Kremen of the University of California at Berkeley found that the presence of wild bees increases the efficiency of sunflower pollination fivefold.

Even though the study looked at wild bees in Great Britain, the same transmission dynamics could easily show up in North America, says coauthor Mark J.F. Brown of Royal Holloway, University of London.

Several small studies have already raised the possibility that the substantial number of viruses and parasites plaguing commercial honeybees and bumblebees are spreading to wild bees that visit the same flowers (SN: 8/16/08, p. 10).

Commercial bees in stressful, often unhygienic working conditions may spread their pathogens to wild pollinators, a large study suggests.

According to recent studies, declines in wild and managed bee populations threaten the pollination of flowers in more than 85 percent of flowering plants and 75 percent of agricultural crops worldwide.

Scientists from the University of Edinburgh and the University of Calgary, Canada, studied the flights of bumble bees as they collected nectar from wild tall larkspur flowers in Alberta, Canada.

(Bee diversity matters: a study in 1993 showed that wild bees specialize in pollinating the base of the flower, while honey bees prefer the top.

A recent study published in the journal Science found that in a span of 120 years, Illinois lost half its wild bee species, largely because of diminished numbers of wild flowering plants.

So far studies suggest that restoring wild habitat near farms to welcome and nurture native bees not only increases crop yield but also makes honeybees themselves more efficient pollinators.

The study also found that N. bombi infections in large - scale commercial bumble bee pollination operations coincided with infections and declines in wild bumble bees.

Their study, reported in the Proceedings of the National Academy of Sciences, found that N. bombi was present in the U.S. as early as 1980, well before several species of wild bumble bees started to go missing across the country.

Scientists hoping to explain widespread declines in wild bumble bee populations have conducted the first long - term genetic study of Nosema bombi, a key fungal pathogen of honey bees and bumble bees.

While the new study is not a definitive explanation of the widespread bumble bee losses, which are likely the result of many factors, Cameron said, it challenges a popular hypothesis about the sudden declines of wild bumblebees in the early 1990s.

«Widespread risk of infectious diseases to wild bees, new study reveals.»

«Managed honeybees linked to new diseases in wild bees, UK study shows.»

Rachael Winfree, an associate professor of entomology at Rutgers University in New Jersey, studied 23 small New Jersey and Pennsylvania watermelon farms and found that wild, native bees were depositing 62 percent of the pollen on the crops.

«Female chimpanzees don't fight for «queen bee» status: Study of social rank in wild chimps shows striking differences between the sexes.»

So in the new study, Loukola and colleagues made the bees forage for sugar water by moving a small, yellow ball to a specific target (as in the video above)-- something far removed from what the insects do in the wild.

The puzzling finding comes on the heels of other studies linking fungicides to declines in honey bee and wild bee populations.

That's the worry of scientists studying the transfer of pathogens to wild bees.

And especially troubing: A second new study suggests the pesticides can harm some wild bees.

On average, only 2 % of wild bee species were responsible for 80 % of the pollination visits witnessed by researchers around the world, according to a study published Tuesday in the journal Nature Communications.

The study suggests that between 2008 and 2013, the numbers of wild bees went down across almost a quarter of the US.

Now a new, comprehensive study by University of Vermont researchers underscores the point — that U.S. wild bees are disappearing in many of the country's most important farmlands and that increased demand for corn to use in biofuel production is a significant part of the problem.