Shift of Nitrogen and Carbon Stable Isotopes in Temporary Pond Tadpoles Following the Decline of Large Mammalian Herbivores

Research in Comoé National Park, Ivory Coast, reveals that the decline of large mammalian herbivores due to civil conflicts has significantly altered nitrogen cycling in savanna ecosystems. Stable isotope analysis of tadpoles from temporary ponds showed a decrease in δ15N values post-decline, indicating a baseline shift in nutrient dynamics. No significant change in δ13C signals suggests minimal alteration in primary energy resources. Interannual and taxon-specific variations in isotope signals highlight the complex interplay between tadpole morphology, diet, and pond characteristics. These findings underscore the critical role of large herbivores in maintaining ecosystem stability.

Ewald, N., Demare, G., Glos, J., Struck, U., & Rödel, M.-O. (2026). Shift of Nitrogen and Carbon Stable Isotopes in Temporary Pond Tadpoles Following the Decline of Large Mammalian Herbivores. Ecology and Evolution, 16(4). Portico. https://doi.org/10.1002/ece3.73508