3-1 Sat Jan 2 Trap morphology in the carnivorous plant genus Utricularia Mordvinov, Y*; Peters, KD; Gonzalez, MS; Müller, UK; Reece, JS; CSU Fresno; CSU Fresno; CSU Fresno; CSU Fresno; CSU Fresno umuller@csufresno.edu http://zimmer.csufresno.edu/~umuller/FBDS/FBDS-home/FBDS-home-welcome.html
Bladderworts (genus Utricularia) are a diverse genus of carnivorous plants with over 230 known species. They inhabit a wide range of geographic locations and habitats, and have evolved a highly derived and variable morphology to match. Their traps can make up a majority of the plant’s biomass, representing a considerable investment by the plant into carnivory. We hypothesize that bladderworts have adaptations to increase the traps’ effectiveness, such as structures that increase encounter probability with profitable prey, or decrease fouling or misfiring. We hypothesize that trap morphology will vary according to habitat and consequently available prey types. We defined morphological traits to assess morphological variation between species as a function of habitat. We described the structures at the trap entrance, trap size, and attachment point of the trap to the rest of the plant. To better understand how Utricularia have adapted across terrestrial and aquatic habitats we categorized morphological data of the plants against ecological covariate data, while correcting for phylogenetic signals. This study might facilitate future studies into how bladderworts have optimized their traps to overcome obstacles to predation in their respective environments.