Tourism infrastructure and physiological stress in free-ranging impalas (Aepyceros melampus) of Serengeti National Park

Large-scale tourism infrastructure in Serengeti National Park elevates physiological stress in free-ranging impalas (Aepyceros melampus), even when tourists are absent. Researchers measured faecal glucocorticoid metabolites (FGMs) as a stress indicator, revealing significantly higher FGM levels in impalas near lodges compared to those near permanent tented camps or seasonal campsites. This suggests that the mere presence of substantial tourist facilities can induce stress in wildlife, posing potential risks to biodiversity. The study highlights the need for future research to identify specific infrastructure features driving this stress response, aiming to inform more sustainable tourism and conservation strategies.

Kessy, B. M., Arukwe, A., Mbise, F. P., Hariohay, K. M., Palme, R., Røskaft, E., & Ranke, P. S. (2026). Tourism infrastructure and physiological stress in free-ranging impalas (Aepyceros melampus) of Serengeti National Park. Global Ecology and Conservation, 67, e04130. https://doi.org/10.1016/j.gecco.2026.e04130