Ph.D Plant Evolutionary Biology, University of Georgia 2003
My research focuses on 1) the impact of landscape level disturbance and habitat fragmentation on the evolutionary trajectories of plant species, particularly neotropical orchids and epiphytes and 2) phylogeographic analyses for the purpose of identifying ancient refugia associated with Pleistocene glacial maxima and subsequent expansion zones of plant taxa in response to global warming.
Our lab employs population genetic tools to develop an understanding of the evolutionary factors that shape patterns of genetic variation in natural plant populations and the manner in which species-wide variation is partitioned and maintained. This is of particular interest in the context of increasingly fragmented landscapes and the ubiquitous nature of human induced habitat disturbance as well as global climate change.
- Organization for Tropical Studies, Assembly of Delegates representative for the University of Georgia. June 2009 - present.
- Kartzinel TR, Shefferson RP, Trapnell DW (in press) Relative importance of pollen and seed dispersal across a Neotropical mountain landscape for an epiphytic orchid. Molecular Ecology.
- Kartzinel TR, Trapnell DW, Shefferson RP (in press) Highly diverse and spatially heterogeneous mycorrhizal symbiosis in a rare epiphyte is unrelated to broad biogeographic or environmental features. Molecular Ecology.
- Kartzinel TR, Trapnell DW, Shefferson RP (2013) Critical importance of large native trees for conservation of a rare Neotropical epiphyte. Journal of Ecology, 101, 1429-1438.
- Trapnell DW, Hamrick JL, Ishibashi C, Kartzinel T (2013) Genetic inference of epiphytic orchid colonization; it may only take one. Molecular Ecology, 22, 3680-3692.
- Hamrick JL, Trapnell DW (2011) Using population genetic analyses to understand patterns of seed dispersal. Acta Oecologica, 37, 641-649.
- Trapnell DW, Hamrick JL, Parker KC, Braungart KW, Glenn TC (2011) Evaluating the utility of microsatellites for investigations of autopolyploid taxa. Journal of Heredity, 102, 473-478.
- Parker KC, Trapnell DW, Hamrick JL, Hodgson WC, Parker AJ (2010) Inferring ancient Agave cultivation practices from contemporary genetic patterns. Molecular Ecology, 19, 1622-1637.
- Gonzales E., Hamrick JL, Smouse PE, Trapnell DW, Peakall, R (2010) The impact of landscape disturbance on spatial genetic structure in the Guanacaste tree, Enterolobium cyclocarpum (Fabaceae). Journal of Heredity, 12, 133-143.
- Trapnell DW, Schmidt JP, Quintana-Ascencio PF, Hamrick JL (2007) Genetic insights into the biogeography of the southeastern endemic, Ceratiola ericoides (Empetraceae). Journal of Heredity, 98, 587-593.
- Parker KC, Hamrick JL, Hodgson WC, Trapnell DW, Parker AJ, Kuzoff RK (2007) Genetic consequences of pre-Colombian cultivation for Agave murpheyi and A. delamateri (Agavaceae). American Journal of Botany, 94, 1479-1490.
- Trapnell DW, Hamrick JL (2006) Floral display and mating patterns within populations of the neotropical epiphytic orchid, Laelia rubescens. American Journal of Botany, 93, 1010-1018.
- Trapnell DW, Hamrick JL (2006) Variety of phorophyte species colonized by the neotropical epiphyte, Laelia rubescens (Orchidaceae). Selbyana, 27, 60-64.
- Schuettpelz E, Trapnell DW (2006) Exceptional epiphyte diversity on a single tree in Costa Rica. Selbyana, 27, 65-71.
- Trapnell DW, Hamrick JL (2005) Mating patterns and gene flow in the neotropical epiphytic orchid, Laelia rubescens. Molecular Ecology, 14, 75-84.
- Trapnell DW, Hamrick JL (2004) Partitioning nuclear and chloroplast variation at multiple spatial scales in the neotropical epiphytic orchid, Laelia rubescens. Molecular Ecology, 13, 2655-2666.
- Trapnell DW, Hamrick JL, Nason JD (2004) Three-dimensional fine-scale genetic structure of the neotropical orchid, Laelia rubescens. Molecular Ecology, 13, 1111-1118.
- Trapnell DW, Hamrick JL, Giannasi DE (2004) Genetic variation and species boundaries in Calopogon (Orchidaceae). Systematic Botany, 29, 308-315.