Word: keeping
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Dates: during 2000-2009
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...species. But a new paper in the journal Biological Conservation says we may not be trying hard enough. A team of Australian researchers led by environmental scientist Lochran Traill finds that current conservation policy tends to underestimate the number of individuals needed in a population of endangered species to keep it viable. In the face of environmental fluctuation and potential disasters, says Traill, we need animal populations to number in the thousands for survival - not in the hundreds, which is what most conservationists...
...Traill and his colleagues, after reviewing the most current data, found that a better rule would be 5,000 - meaning no fewer than 5,000 adult individuals are needed to keep a species safe from the threat of extinction. Dip below that level, and any sudden change - the loss of a valued habitat, a new disease - could wipe out a species before conservationists would have time to act. "Small populations have therefore reached a point of departure: away from the ability to adapt to changing environmental circumstances and toward inflexible vulnerability to those same changes," writes Traill. (Read "Extinction 'Gene...
That's Not Entertainment Glenn Beck is a charlatan [Sept. 28]. he has made himself rich off people's fears without making the slightest constructive comment about national issues. Instead, he has spread innuendo to keep his audience happy. He's a TV evangelist who makes altar calls and then drives away in his Cadillac. Alan Moen, ENIAT, WASH...
...With only a few weeks left before winter comes, environmentalists will have to work fast to keep Luzhkov from implementing his zaniest plan to date - and to stop the first snowflakes from wafting down to the city streets...
...September - the often cash-strapped air force is paid to make sure that it doesn't, well, rain on the parades. With a budget of $40 billion a year (larger than New York City's budget), Moscow can easily afford the $2 million to $3 million price tag to keep the skies blue as spectators watch the tanks and rocket launchers roll along Red Square. Now there's a new challenge for the air force: Moscow's notorious blizzards...