Certain species occupy multiple trophic levels within a food web
Certain species, particularly omnivores and intraguild predators, regularly occupy multiple trophic levels within ecological food webs by feeding across different functional groups and resources.
The claim is a well-established ecological fact concerning omnivory and trophic flexibility. Multiple retrieved papers explicitly discuss omnivores, intraguild predators, and species with generalized diets that operate across multiple trophic levels.
Matthew P. Daugherty, Jason P. Harmon, Cheryl J. Briggs. Trophic supplements to intraguild predation. 2007. https://doi.org/10.1111/j.0030-1299.2007.15378.x
Discusses intraguild predation and omnivory, noting that consumers often feed across multiple trophic levels and modules.
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Huijuan Wang, Yilan Shu, Zexing Kuang, Zilin Han, Jiaheng Wu, Xinmiao Huang, Xiaoyong Song, Jing Yang, Zhengqiu Fan. Bioaccumulation and potential human health risks of PAHs in marine food webs: A trophic transfer perspective.. 2024. https://doi.org/10.1016/j.jhazmat.2024.136946
Categorizes marine organisms using stable isotope methods across multiple trophic levels, including omnivorous species.
M. P. Neves, R. L. Delariva, Daniel M. Perkins, C. B. Fialho, P. Kratina. Trophic plasticity of omnivorous fishes in natural and human‐dominated landscapes. 2023. https://doi.org/10.1002/lno.12467
Highlights trophic plasticity in omnivorous fishes that expand their diets and occupy flexible trophic positions across environments.
V. Saito, P. Kratina, G. Barbosa, Fabio Cop Ferreira, Jean Barbosa Leal, Gabriela Zemelka, Hugo Sarmento, Daniel M. Perkins. Untangling the complex food webs of tropical rainforest streams.. 2024. https://doi.org/10.1111/1365-2656.14121
Notes that omnivorous fish species connect multiple food web compartments through non-specialised interactions spanning different trophic roles.
Richarson MRA, Ingram T. Effects of competition and predation risk from a life history intraguild predator on individual specialisation.. 2025. https://doi.org/10.1111/1365-2656.70090
Examines a native fish species with a generalized diet that competes and interacts across multiple trophic resource pathways.
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