29-7 Spatial Analysis of Toxic Flora as Environmental Risk Factors on Spelman College’s Campus

Session: Undergraduate Research, Part II (Posters)

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Plant toxicity refers to the presence & biological activity of plant-derived chemical compounds that induce adverse physiological effects in exposed humans or animals following ingestion, inhalation, or dermal contact. Spelman College has a wide diversity of intentionally planted urban trees that vary in toxic potential. For this study, Spelman’s campus was divided into three to four survey plots, and every tree species within each plot was identified and documented based on its geographical location & taxonomic classification. Each species was categorized into one or more of four toxicity classes using guidelines from the Poison Control Center & botanical toxicity references from the University of California, Berkeley. Class 1 includes plants capable of causing severe illness or death if ingested; Class 2 includes species that may cause mild symptoms such as vomiting or diarrhea; Class 3 refers to plants containing oxalate crystals that can irritate the skin, mouth, or throat; and Class 4 includes plants whose sap or thorns may produce skin irritation or rashes. Geographical Informational System (GIS) mapping was used to quantify percent cover of toxic flora within toxicity classes 1-4. A statistical analysis using a t-test was performed to compare the number of species per class, or species richness, between two sites, the Oval & the Amphitheater. This survey establishes a baseline dataset documenting the location, abundance, and toxic properties of campus vegetation. The study will provide valuable information on ecological roles, potential health risks, and a database for future plant toxicology research on Spelman’s campus. This data can also be used to raise plant awareness, promote safety, and guide future research on plant toxins in urban, cultivated environments.

Geological Society of America Abstracts with Programs. Vol. 58, No. 1, 2026

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