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Mass extinctions led to low species diversity, dinosaur rule

2017-10-10 06:00:00| LifeSciencesWorld

[NEWS] Two of the earth's five mass extinction events - times when more than half of the world's species died - resulted in the survival of a low number of so-called “weedy” species that spread their sameness across the world as the Earth recovered from these dramatic upheavals. The findings could shed light on modern high extinction rates and how biological communities may change in the future. David J. Button, an NC State and North Carolina Museum of Natural Sci…

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Frogs illustrate the creative destruction of mass extinctions

2017-07-03 06:00:00| LifeSciencesWorld

[NEWS] IMAGE: This is a tree frog (genus Boophis) found on Madagascar and Mayotte Island, off the Southeast coast of Africa.  Credit: Brian Freiermuth/Univ. of Florida Until now, biologists have struggled to reconstruct an accurate family tree for frogs…

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Shock at global warming speed: 'widespread future extinctions' predicted

2016-03-27 16:58:00| Climate Ark Climate Change & Global Warming Newsfeed

Advertiser and Times: Climate change is happening TEN TIMES quicker than at any point since the age of the dinosaurs, warns new research. And the unprecedented rate of change is likely to trigger widespread future extinctions. A notorious warming period 55 million years known as the Palaeocene-Eocene Thermal Maximum (PETM) - when temperatures rose by at least 5C - is considered the most similar to current conditions. It led to animal dwarfism with horses, deer and other mammals shrinking dramatically in size....

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Mass Extinctions And Climate Change: Why The Speed Of Rising Greenhouse Gases Matters

2016-03-24 18:59:00| Climate Ark Climate Change & Global Warming Newsfeed

Conversation: We now know that greenhouse gases are rising faster than at any time since the demise of dinosaurs, and possibly even earlier. According to research published in Nature Geoscience this week, carbon dioxide (CO2) is being added to the atmosphere at least ten times faster than during a major warming event about 50 million years ago. We have emitted almost 600 billion tonnes of carbon since the beginning of the Industrial Revolution, and atmospheric CO2 concentrations are now increasing at a rate of...

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Invasive species blamed as second biggest cause of extinctions

2016-02-17 01:01:00| Climate Ark Climate Change & Global Warming Newsfeed

New Scientist: Alien invaders are the second biggest cause of species extinctions, according to a new study, but not everyone is convinced. The role invaders play in wiping out native species has long been a bone of contention for conservationists. The new study looks at the Red List, a catalogue of extinct and threatened species drawn up by the International Union for Conservation of Nature (IUCN). For species that are completely extinct or extinct in the wild, those who draw up the list identify one or...

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