Oral Presentation Society for Freshwater Science 2026 Annual Meeting

The effects of microplastic uptake on amphibian growth and development (134716)

Andre Felton 1 , Daniela Cortez 2 , Oscar Hernandez-Reyes 2 , Cristina Mendez 2 , Meredith Slimp 2 , Briaunna Zamarripa , Jeffrey Hutchinson 1
  1. Biology, Health, and the Environment, University of Texas at San Antonio, San Antonio, TX, USA
  2. University of Texas at San Antonio, TX, United States

Global declines of amphibian populations have primarily focused on classic chemical contaminants and compounds (i.e., pesticides, fertilizers, salts, etc.), but there is a paucity in research addressing the role of emerging pollutants such as microplastics and nanoplastics on amphibian health and contributory role to global declines. Microplastic pollution has been shown to be ubiquitous across freshwater systems yet our understanding of exposure routes and interactions within ephemeral fluvial systems that exhibit high spatiotemporal variability in MP concentrations on co-occurring amphibians that utilize ephemeral pools for reproductive and development purposes is limited. In this study, the effect of chronic microplastic exposure on amphibian growth and development throughout larval and metamorphic stages was examined using Xenopus laevis.  Tadpoles across four treatment concentrations were exposed to secondary generated polyethylene microplastic fragments throughout pre- and pro-metamorphic development. Results regarding impacts on growth and developmental stages are currently being processed and analyses will be reported during the poster presentation. Amphibians are among the most threatened taxa globally and have served as effective models for other ecotoxicological studies, yet less than 1% of all studies investigating the effects of MP on biota have used amphibians. As global plastic production is expected to continue and increase, understanding MP exposure routes and effects of chronic exposure on amphibian health can provide insight to effective mitigative practices in conservation efforts.