1. Native brook trout and naturalized brown trout effects on two Pennsylvania headwater stream food chains Open Access Author: Tzilkowski, Caleb J Title: Native brook trout and naturalized brown trout effects on two Pennsylvania headwater stream food chains Graduate Program: Wildlife and Fisheries Science Keywords: food chainsindigenous speciesintroduced speciesstreamspredator-prey interactionstrophic cascade File: Download etd.pdf Committee Members: Jay Richard Stauffer Jr., Committee Chair/Co-ChairC Paola Ferreri, Committee MemberHunter J Carrick, Committee MemberEric S Post, Committee Member