Elevated levels of δ15N in riverine Painted Turtles (Chrysemys picta): trophic enrichment or anthropogenic input?

Author: Welk Megan   Freedberg Steven  

Publisher: NRC Research Press

ISSN: 1480-3283

Source: Canadian Journal of Zoology, Vol.91, Iss.12, 2013-01, pp. : 899-905

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