Multiple environmental stressors affect predation pressure in a tropical freshwater system.

Autor: Zanghi C; University of Bristol, School of Biological Sciences, Life Sciences Building, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK. cos.zan@gmail.com., Penry-Williams IL; University of Bristol, School of Biological Sciences, Life Sciences Building, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK., Genner MJ; University of Bristol, School of Biological Sciences, Life Sciences Building, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK., Deacon AE; The University of The West Indies, Department of Life Sciences, St Augustine, Trinidad and Tobago., Ioannou CC; University of Bristol, School of Biological Sciences, Life Sciences Building, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK.
Jazyk: angličtina
Zdroj: Communications biology [Commun Biol] 2024 May 29; Vol. 7 (1), pp. 663. Date of Electronic Publication: 2024 May 29.
DOI: 10.1038/s42003-024-06364-6
Abstrakt: Environmental change can alter predator-prey dynamics. However, studying predators in the context of co-occurring environmental stressors remains rare, especially under field conditions. Using in situ filming, we examined how multiple stressors, including temperature and turbidity, impact the distribution and behaviour of wild fish predators of Trinidadian guppies (Poecilia reticulata). The measured environmental variables accounted for 17.6% of variance in predator species composition. While predator species differed in their associations with environmental variables, the overall prevalence of predators was greatest in slow flowing, deeper, warmer and less turbid habitats. Moreover, these warmer and less turbid habitats were associated with earlier visits to the prey stimulus by predators, and more frequent predator visits and attacks. Our findings highlight the need to consider ecological complexity, such as co-occurring stressors, to better understand how environmental change affects predator-prey interactions.
(© 2024. The Author(s).)
Databáze: MEDLINE
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