Natural enemies and biodiversity: The double-edged sword of trophic interactions


Natural enemies, that is, species that inflict harm on others while feeding on them, are fundamental drivers of biodiversity dynamics and represent a substantial portion of biodiversity as well. Along the life history of the Earth, natural enemies have been involved in probably some of the most productive mechanisms of biodiversity genesis; that is, adaptive radiation mediated by enemy-victim coevolutionary processes. At ecological timescales, natural enemies are a fundamental piece of food webs and can contribute to biodiversity preservation by promoting stability and coexistence at lower trophic levels through top-down regulation mechanisms. However, natural enemies often produce dramatic losses of biodiversity, especially when humans are involved.


apparent competition; coexistence; ecological opportunity; enemy-victim interactions; top-down regulation

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  • Branch, T. A., Lobo, A. S., & Purcell, S. W. (2013). Opportunistic exploitation: An overlooked pathway to extinction. Trends in Ecology & Evolution, 28, 409–413. doi: 10.1016/j.tree.2013.03.003

  • Brodersen, J., Post, D. M., & Seehausen, D. (2018). Upward adaptive radiation cascades: Predator diversification induced by prey diversification. Trends in Ecology & Evolution, 33, 59–70. doi: 10.1016/j.tree.2017.09.016

  • Chesson, P. (2012). Species competition and predation. In R. Lemans (Ed.), Ecological systems (pp. 223–256). New York: Springer. doi: 10.1007/978-1-4614-5755-8

  • Doherty, T. S., Glen, A. S., Nimmo, D. G., Ritchie, E. G., & Dickman, C. R. (2016). Invasive predators and global biodiversity loss. Proceedings of the National Academy of Sciences, 113, 11261–11265. doi: 10.1073/pnas.1602480113

  • Holt, R. D., & Bonsall, M. B. (2017). Apparent competition. Annual Review of Ecology, Evolution, and Systematics, 48, 447–71. doi: 10.1146/annurev-ecolsys-110316-022628

  • Stroud, J. T., & Losos, J. B. (2016). Ecological opportunity and adaptive radiation. Annual Review of Ecology, Evolution, and Systematics, 47, 507–32. doi: 10.1146/annurev-ecolsys-121415-032254

  • Terborgh, J. T. (2015). Toward a trophic theory of species diversity. Proceedings of the National Academy of Sciences, 112, 11415–11422. doi: 10.1073/pnas.1501070112

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