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. 2012 Mar 1;7(3):e32071. doi: 10.1371/journal.pone.0032071

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Dalerum et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Isotope niche breadth was estimated as the Euclidian distances to group centroids in a 2 dimensional isotope space formed by δ¹³C and δ¹³N. Figure presents mean ± 1 SE.