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Politics : Sharks in the Septic Tank

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To: Brumar89 who wrote (81519)	8/15/2009 6:46:41 PM
From: average joe	Read Replies (1) of 82486

Many life forms are noticeably shrinking on planet earth as the universe expands and it has been wrongly attributed to Anthropogenic Global Warming. "Environmental change, including climate change, can cause rapid phenotypic change via both ecological and evolutionary processes. Because ecological and evolutionary dynamics are intimately linked, a major challenge is to identify their relative roles. We exactly decomposed the change in mean body weight in a free-living population of Soay sheep into all the processes that contribute to change. Ecological processes contribute most, with selection--the underpinning of adaptive evolution--explaining little of the observed phenotypic trend. Our results enable us to explain why selection has so little effect even though weight is heritable, and why environmental change has caused a decline in the body size of Soay sheep. 10.1126/science.1173668" citeulike.org

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