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27 November 2013 12:59 pm ,
Vol. 342 ,
The new head of the National Center for Science Education promises to "fight the good fight" against attacks on...
Analyses of the H7N9 strains isolated from four new cases show that the virus is evolving rapidly, heightening anxiety...
In 2009, Jack Szostak shared a Nobel Prize for his part in discovering the role of telomeres, the end bits of...
Science has exposed a thriving academic black market in China involving shady agencies, corrupt scientists, and...
Paper-selling agencies flourish in the aura of reputable businesses. For some scientists, it may be difficult to tell...
Featuring the first lunar rover in 40 years, Chang'e-3 is seen as an important milestone on China's quest to send a...
Data collected by satellites and floating probes have chronicled a 2-decade rise in the temperature and thickness of a...
Cholesterol, the artery-clogging molecule that contributes to cardiovascular disease, has another nasty trick up its...
- 27 November 2013 12:59 pm , Vol. 342 , #6162
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ScienceShot: Grazed Grasslands Are Biodiversity Hot Spots
15 March 2012 8:01 pm
Talk about packing it in. Researchers have found 89 plant species crammed into a single square meter of mountain grassland in central Argentina, including many grasses and small flowers. Several meadows in Romania and the Czech Republic were nearly as rich. These biodiversity hot spots, reported today in the Journal of Vegetation Science, emerged from researchers scanning millions of published and unpublished plant surveys in different-sized plots. Grazing animals, such as cows and sheep, help keep these small plots of land rich in species by removing the tops of plants, thereby allowing more individual plants access to light, the researchers say. Such hot spots used to be a lot more common, but now, with fewer free-ranging livestock, they're quite rare.
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