Usted probablemente ha escuchado que el derretimiento del permafrost es un gran contribuyente al aumento de los niveles de gases de efecto invernadero en nuestra atmósfera, y que el permafrost en derretimiento puede incluso causar una aceleración imparable del calentamiento global. Sin embargo, una nueva investigación con el apoyo de la National Science Foundation (NSF), presenta un contraargumento de este punto de vista cientÃfico, ampliamente difundido, de que el deshielo del permafrost acelera uniformemente calentamiento de la atmósfera, indicando que algunos lagos del Ãrtico, en cambio, almacenan más gases de efecto invernadero que los que se emiten a la atmósfera.
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As every parent knows, bringing up children can be a draining business. Now researchers have found that banded mongoose parents find it so stressful, they have no energy left to care for the next litter.
It seems the energetic demands of caring for pups pushes up the mongooses' stress hormone levels.
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Their scruffy beards weren't ironic, but there are reasons mammoths and mastodons could have been the hipsters of the Ice Age.
According to research from the University of Cincinnati, the famously fuzzy relatives of elephants liked living in Greater Cincinnati long before it was trendy -- at the end of the last ice age. A study led by Brooke Crowley, an assistant professor of geology and anthropology, shows the ancient proboscideans enjoyed the area so much they likely were year-round residents and not nomadic migrants as previously thought.
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Trust me, no one loves a nice, big, juicy steak more than me and while I have no immediate plans of becoming a vegetarian, I am a little concerned about the resources and costs it takes to produce the proteins of our favorite meals. From the land that is used by livestock to the supplies and energy it takes to raise these animals for our consumption, it is evident that environmental resources take a toll. But what is the real cost? New research at the Weizmann Institute of Science, conducted in collaboration with scientists in the US, calculates these environmental costs and compares various animal proteins to give a multi-perspective picture of what resources are really being used.
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The size and age of plants have more of an impact on their productivity than temperature and precipitation, according to a landmark study by University of Arizona researchers. UA professor Brian Enquist and postdoctoral researcher Sean Michaletz, along with collaborators Dongliang Cheng from Fujian Normal University in China and Drew Kerkhoff from Kenyon College in Gambier, Ohio, have combined a new mathematical theory with data from more than 1,000 forests across the world to show that climate has a relatively minor direct effect on net primary productivity, or the amount of biomass – wood or any other plant materials – that plants produce by harvesting sunlight, water and carbon dioxide.
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