Interior Secretary Sally Jewell announced today the recovery of the Delmarva Peninsula fox squirrel, previously protected as an endangered species. The Interior Department made its finding based on an increase in distribution since 1967 from 4 to 10 counties where the squirrel can be found, and an overall population of 20,000. But despite these modest population gains, sea-level rise remains a severe threat to the species.
"No one should discount the heroic conservation work that has been done to keep this squirrel from going extinct," said Brett Hartl, endangered species policy director at the Center for Biological Diversity. "But most of the places where the squirrel lives will eventually be underwater due to climate change and sea-level rise, and unfortunately most of the places on higher ground have already been lost to development."
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By 2100, over 13 billion people could be walking the planet. That's the conclusion of a new study published today in Science, which employed UN data to explore the probability of various population scenarios. The new study further demolishes the long-held theory that human population growth will quit growing by mid-century and then fall. "Analysis of these data reveals that, contrary to previous literature, world population is unlikely to stop growing this century," reads the paper.
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Los hallazgos por la profesora de la Universidad de Montana, la Dra. Lilian Calderón-Garcidueñas, MA, MD, Ph.D., y su equipo de investigadores revelan que los niños que viven en las grandes ciudades tienen un mayor riesgo de inflamación cerebral y cambios neuro-degenerativos, incluyendo las enfermedades de Alzheimer y Parkinson.
Los hallazgos de Calderón-Garcidueñas se detallan en un documento titulado "La contaminación del aire y los niños: Anticuerpos neurales y de uniones estrechas, y la combustión de metales, el papel de la ruptura de la barrera y la inmunidad del cerebro en la neuro-degeneración."
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Depictions of animals in ancient Egyptian artefacts have helped scientists assemble a detailed record of the large mammals that lived in the Nile Valley over the past 6,000 years. A new analysis of this record shows that species extinctions, probably caused by a drying climate and growing human population in the region, have made the ecosystem progressively less stable.
The study, published in Proceedings of the National Academy of Sciences (PNAS), found that local extinctions of mammal species led to a steady decline in the stability of the animal communities in the Nile Valley.
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