Un estudio que involucró a abejas con etiquetas de radiofrecuencia diminutas encontró que la exposición a largo plazo a un pesticida de neonicotinoides obstaculiza la capacidad de las abejas para buscar alimentarse de polen.
La investigación realizada por Nigel Raine, profesor de la Universidad de Guelph, y Richard Gill, del Imperial College de Londres, muestra cómo la exposición a pesticidas a largo plazo afecta el comportamiento individual de las abejas en el dÃa a dÃa, incluyendo la recolección de polen y flores que las abejas obreras escogen para visitar.
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You have probably heard that melting permafrost is a big contributor to increasing the levels of greenhouse gases in our atmosphere, and that melting permafrost may even cause an unstoppable acceleration of global warming.
New research, however, supported by the National Science Foundation (NSF), counters this widely-held scientific view that thawing permafrost uniformly accelerates atmospheric warming, indicating instead that certain arctic lakes store more greenhouse gases than they emit into the atmosphere.
The study, published this week in the journal Nature, focuses on thermokarst lakes, which occur as permafrost thaws and creates surface depressions that fill with melted fresh water, converting what was previously frozen land into lakes.
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The mystery behind the movements of flocking starlings could be explained by the areas of light and dark created as they fly, new research suggests. The research, conducted by the University of Warwick and published in the journal PNAS, found that flocking starlings aim to maintain an optimum density at which they can gather data on their surroundings. This occurs when they can see light through the flock at many angles, a state known as marginal opacity. The subsequent pattern of light and dark, formed as the birds attempt to achieve the necessary density, is what provides vital information to individual birds within the flock.
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In a significant victory for Prime Minister Tony Abbott, the Australian Senate has voted to repeal the country's two-year-old carbon tax. Abbott made dismantling the tax one of the cornerstones of his campaign last September even as Australia remains one of the highest carbon emitters per capita in the industrialized world.
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