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Tag: extinction
Humans speeding up evolution by causing extinction of 'younger' species
2016-02-23 13:00:00| LifeSciencesWorld
[NEWS] Just three years after crayfish were introduced to a B.C. lake, two species of fish that had existed in the lake for thousands of years were suddenly extinct. But it's what took their place that has scientists fascinated. New research from UBC shows that when humans speed up the usually slow process of evolution by introducing new species, it can result in a lasting impact on the ecosystem. The phenomenon is known as reverse speciation and researchers witnessed it in Eno…
Tags: evolution
humans
species
causing
CU-Boulder study: Ancient extinction of giant Australian bird points to humans
2016-01-29 03:44:00| Climate Ark Climate Change & Global Warming Newsfeed
Science Codex: The first direct evidence that humans played a substantial role in the extinction of the huge, wondrous beasts inhabiting Australia some 50,000 years ago -- in this case a 500-pound bird -- has been discovered by a University of Colorado Boulder-led team. The flightless bird, known as Genyornis newtoni, was nearly 7 feet tall and appears to have lived in much of Australia prior to the establishment of humans on the continent 50,000 years ago, said CU-Boulder Professor Gifford Miller. The evidence...
Tags: study
points
humans
australian
'Racing Extinction' sounds alarm Earth's disappearing species
2015-11-30 14:56:00| Climate Ark Climate Change & Global Warming Newsfeed
Mother Nature: Raising awareness and outrage about dolphin slaughter in Japan, The Cove succeeded in saving thousands of dolphins. Now filmmaker Louie Psihoyos and producer Fisher Stevens have teamed up on an even more ambitious documentary that aims to do the same for endangered species and their disappearing habitats. Racing Extinction, which had a theatrical run in 10 cities this fall, will premiere to a wider audience on Dec. 2 to draw global attention to the biodiversity clock, which is ticking down ...
Tags: sounds
racing
species
alarm
In Brazil, Deforestation Is Up, And So Is The Risk Of Tree Extinction
2015-11-27 18:43:00| Climate Ark Climate Change & Global Warming Newsfeed
National Public Radio: The rate of deforestation in Brazil has increased by 16 percent over the past year, the country's Environment Ministry announced. Brazil has often declared progress in reducing the rate of deforestation in the Amazon, but the government's own figures, released Thursday, show the challenges still facing the country. Satellite imagery showed that 2,251 square miles were destroyed in Brazil's Amazon from August 2014 to July 2015, compared with 1,935 square miles destroyed in the same period a...
More than half of the Amazons tree species may be threatened with extinction
2015-11-21 09:03:00| Climate Ark Climate Change & Global Warming Newsfeed
Mongabay: Of the Amazon's 15,000 tree species, thousands are at risk. Those in the southern and eastern parts of the Amazon, where deforestation rates are highest, are the most threatened. The present network of protected areas and indigenous territories, which covers over 50 percent of the Amazon, could offer a ray of hope, researchers say. While the results are still preliminary, researchers say that the study provides the size, urgency, and feasibility of undertaking the task of evaluating the Amazon...
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