Predator-induced collapse of niche structure and species coexistence
| العنوان: | Predator-induced collapse of niche structure and species coexistence |
|---|---|
| المؤلفون: | Thomas W. Schoener, Jonathan B. Losos, Tyler C. Coverdale, Joshua H. Daskin, Matthew C. Hutchinson, Naomi A Man In 't Veld, Charles C.Y. Xu, Johanna E. Wegener, Todd M. Palmer, Dominic A. Evangelista, Jason J. Kolbe, Kiyoko M. Gotanda, Kena Fox-Dobbs, Robert M. Pringle, David A. Spiller, Rowan D. H. Barrett, Timothy J. Thurman, Tyler R. Kartzinel |
| المصدر: | Nature. 570:58-64 |
| بيانات النشر: | Springer Science and Business Media LLC, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 0106 biological sciences, 0301 basic medicine, Ecological niche, Multidisciplinary, biology, Ecology, Interspecific competition, Brown anole, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, Anolis, Predation, 03 medical and health sciences, 030104 developmental biology, Anolis smaragdinus, Trophic level, Apex predator |
| الوصف: | Biological invasions are both a pressing environmental challenge and an opportunity to investigate fundamental ecological processes, such as the role of top predators in regulating biodiversity and food-web structure. In whole-ecosystem manipulations of small Caribbean islands on which brown anole lizards (Anolis sagrei) were the native top predator, we experimentally staged invasions by competitors (green anoles, Anolis smaragdinus) and/or new top predators (curly-tailed lizards, Leiocephalus carinatus). We show that curly-tailed lizards destabilized the coexistence of competing prey species, contrary to the classic idea of keystone predation. Fear-driven avoidance of predators collapsed the spatial and dietary niche structure that otherwise stabilized coexistence, which intensified interspecific competition within predator-free refuges and contributed to the extinction of green-anole populations on two islands. Moreover, whereas adding either green anoles or curly-tailed lizards lengthened food chains on the islands, adding both species reversed this effect—in part because the apex predators were trophic omnivores. Our results underscore the importance of top-down control in ecological communities, but show that its outcomes depend on prey behaviour, spatial structure, and omnivory. Diversity-enhancing effects of top predators cannot be assumed, and non-consumptive effects of predation risk may be a widespread constraint on species coexistence. Whole-ecosystem manipulations of Caribbean islands occupied by brown anoles, involving the addition of competitors (green anoles) and/or top predators (curly-tailed lizards), demonstrate that predator introductions can alter the ecological niches and destabilize the coexistence of competing prey species. |
| تدمد: | 1476-4687 0028-0836 |
| DOI: | 10.1038/s41586-019-1264-6 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::ca18fe49f36387fcee4551c9133c956e https://doi.org/10.1038/s41586-019-1264-6 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........ca18fe49f36387fcee4551c9133c956e |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14764687 00280836 |
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| DOI: | 10.1038/s41586-019-1264-6 |