1. Differences in Anaxyrus americanus dorsal coloration along an environmental gradient Open Access Author: Mack, Mariah Title: Differences in Anaxyrus americanus dorsal coloration along an environmental gradient Area of Honors: Biology (Behrend) Keywords: American toadcolor variationamphibiansenvironmental factorssite differencesdorsal coloration File: Download Mack_Thesis_DIFFERENCES_IN_ANAXYRUS_AMERICANUS_DORSAL_COLORATION.pdf Thesis Supervisors: Lynne Elizabeth Beaty, Thesis SupervisorMichael A Campbell, Thesis Honors Advisor