1. Molecular and isotopic indicators of canopy closure in ancient forests and the effects of environmental gradients on leaf alkane expression Open Access Author: Graham, Heather Valeah Title: Molecular and isotopic indicators of canopy closure in ancient forests and the effects of environmental gradients on leaf alkane expression Graduate Program: Geosciences Keywords: n-alkanescanopyisotope fractionationCerrejonGuaduas File: Download DissPdfCombined.pdf Committee Members: Katherine Haines Freeman, Dissertation Advisor/Co-AdvisorLee Kump, Committee MemberMARK E PATZKOWSKY, Committee MemberPeter Daniel Wilf, Committee MemberErica A H Smithwick, Committee MemberScott W Wing, Special Member