Tag Archives: Trees

Simple Physics May Limit the Size of Leaves

5by Adrian Cho

ScienceNOW – Leaf growth may not be as complicated as it seems. When compared, species to species, shorter trees exhibit a greater variety of leaf sizes than taller ones, with the tallest trees all having leaves that measure 10 to 20 centimeters in length, a biophysicist and a biologist report. The narrow size range may have a simple explanation in the inner plumbing of trees, they say. If it’s correct, the analysis would also explain why the tallest trees top out at about 100 meters.

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Ash dieback: number of affected counties doubles

Adam Vaughan and John Vidal
The Guardian – The number of English counties suffering outbreaks of ash dieback disease in the wild has more than doubled, the government said on Wednesday.
As tree growers and plant health experts from 80 organisations met at a summit convened by the environment secretary, Owen Paterson, the Department for Environment, Food and Rural Affairs (Defra) said ash dieback had now been confirmed in the wild in six new counties: Berkshire, Bedfordshire, Lincolnshire, Northumberland, Sussex and Yorkshire. A total of 115 sites in 11 counties, including some in Wales and Scotland, are now confirmed.
 
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Source and Photo: The Guardian, November 7th, 2012
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