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Mesquite Trees Displacing Southwestern Grasslands
2012-03-19 04:15:21

As the desert Southwest becomes hotter and drier, semi-arid grasslands are slowly being replaced by a landscape dominated by mesquite trees, such as Prosopis velutina, and other woody shrubs, a team of University of Arizona researchers has found. In a "leaf-to-landscape" approach, the team combined physiological experiments on individual plants and measurements across entire ecosystems to quantify how well grasslands, compared to mesquite trees and woody shrubs, cope with heat and water...

Image 1 - Climate Change To Blame For Dead African Trees
2011-12-12 10:20:24

Trees are dying in the Sahel, a region in Africa south of the Sahara Desert, and human-caused climate change is to blame, according to a new study led by a scientist at the University of California, Berkeley. "Rainfall in the Sahel has dropped 20-30 percent in the 20th century, the world's most severe long-term drought since measurements from rainfall gauges began in the mid-1800s," said study lead author Patrick Gonzalez, who conducted the study while he was a visiting scholar at UC...

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2007-05-17 00:00:00

By JAMES CALDERWOOD DUBAI, United Arab Emirates - Twisting out of the hot sand of the Arabian Peninsula is one of nature's toughest trees. Known for its coarse bark and green canopy that provides rare shade from the sweltering sun, the ghaf tree has been a steadfast survivor in brutal desert. But climate change, groundwater overuse, excessive woodcutting and increased camel grazing are threatening the tree's existence, environmentalists say. The World Wildlife Fund and the Emirates...


Word of the Day
callithump
  • A somewhat riotous parade, accompanied with the blowing of tin horns, and other discordant noises; also, a burlesque serenade; a charivari.
'Callithump' is a back-formation of 'callithumpian,' a 'fanciful formation' according to the Oxford English Dictionary. However, the English Dialect Dictionary, says 'Gallithumpians' is a Dorset and Devon word from the 1790s that refers to 'a society of radical social reformers' or 'noisy disturbers of elections and meetings.'
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