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David H. Siemens and Riston Haugen Plant chemical defense allocation constrains evolution of tolerance to community change across a range boundary Ecology and Evolution 3

Version of Record online: 5 OCT 2013 | DOI: 10.1002/ece3.657

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Because most transplant studies show that areas just across geographic range boundaries are stressful, factors that interfere with the process of adaptation to the stressful environments may contribute to range limit development. In a common garden field experiment set up across a range boundary, we found that plants of Boechera stricta with inherently high levels of glucosinolate toxins were less able to tolerate the stress associated with the change in the neighboring plant community across the range boundary. Higher glucosinolate levels would also be needed for range expansion because attack by generalist insect herbivores increases across the range.

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