Trophic niche overlap decreases in related mesocarnivore species Sarabia, Carlos Hernández-Hernández, Javier Miqueleiz, Imanol Virgós, Emilio Leonard, Jennifer A. Gil Sánchez, José María Carnivores Intraguild competition NDVI In natural environments, competition between species is a crucial factor for the survival or demise of populations. Therefore, understanding the mechanisms that promote species coexistence is crucial in community and evolutionary ecology. The phylogenetic limiting to similarity hypothesis (PLSH) posits that closely related species should experience greater competition due to niche conservatism, leading to higher overlap in resource use. However, studies have shown mixed results regarding the influence of phylogenetic distance and other abiotic and biotic factors on interspecific competition. This study, which is based on an extensive bibliographic review of more than 200 sources over nearly five decades, explores the role of phylogenetic relatedness, body mass differences, and environmental factors such as primary productivity, in shaping trophic niche overlap among mesocarnivores across ten global biomes. Our results suggest that phylogenetic distance and body mass differences are the most significant predictors of trophic niche overlap, while environmental factors like primary productivity also play a crucial role. These findings highlight the complexity of species interactions, emphasizing that trophic niche overlap is influenced by a combination of factors. This study contributes to a deeper understanding of the dynamics governing species coexistence and the assembly of ecological communities. 2025-09-17T08:50:22Z 2025-09-17T08:50:22Z 2025-08-20 journal article Sarabia, C., Hernández-Hernández, J., Miqueleiz, I., Virgós, E., Leonard, J.A. and María Gil-Sánchez, J. (2025), Trophic niche overlap decreases in related mesocarnivore species. Oikos e11324. https://doi.org/10.1002/oik.11324 https://hdl.handle.net/10481/106376 10.1002/oik.11324 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional John Wiley & Sons Ltd