1. Abiotic and biotic factors affecting seed release and dispersal of the invasive thistles Carduus nutans and Carduus acanthoides Open Access Author: Marchetto, Katherine Myers Title: Abiotic and biotic factors affecting seed release and dispersal of the invasive thistles Carduus nutans and Carduus acanthoides Graduate Program: Ecology Keywords: population spread ratesRhinocyllus conicuswind dispersalseed releaseCarduus acanthoidesCarduus nutansParticle Image Velocimetry File: Download Marchetto.thesis.b.pdf Committee Members: Katriona Shea, Thesis Advisor/Co-AdvisorKatriona Shea, Thesis Advisor/Co-Advisor