Horticulture & Related FieldsSarah Tash

Assessing the Influence of Drought Duration on Seed Germination of the Endangered Spider Shoal Lily (hymenocallis Coronaria): a Controlled Study

This project will focus on the affect of drought on seed germination and root establishment of the endemic endangered spider shoal lily (Hymenocallis coronaria). This will be conducted through a controlled study, utilizing elevation in a replicated riverbed environment to test if new seedling exposure to drought during germination alters root biomass and establishment for H. coronaria. We hypothesize that new seeds exposed to longer periods of drought due to higher elevation within the riverbed will produce root systems of less biomass and length then seeds exposed to normal water levels. Seeds of lower root biomass and length may be less likely to find establishment within their habitats, making them at risk for becoming displaced to deeper sections of rivers, where conditions are detrimental to survival. This study will provide critical information for timing and site selection of restoration efforts across the entire habitat of the species.