Predation risk constrains herbivores’ adaptive capacity to warming
| Autor: | Guy A. Balme, Michiel P. Veldhuis, Ross T. Pitman, Joris P. G. M. Cromsigt, Tim R. Hofmeester, Dave J. Druce |
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| Přispěvatelé: | Olff group |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Foraging Biology 010603 evolutionary biology 01 natural sciences Predation Ecosystem PREY PREFERENCES Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences Trophic level VULNERABILITY 2. Zero hunger Herbivore Adaptive capacity CLIMATE-CHANGE LANDSCAPE Ecology Community Global warming 15. Life on land FRAMEWORK OVERLAP DECLINES 13. Climate action MAMMALS PATTERNS RESPONSES |
| Zdroj: | Nature Ecology and Evolution, 4, 1069-1074 Nature Ecology & Evolution, 4(8), 1069-1074. Nature Publishing Group |
| ISSN: | 2397-334X |
| DOI: | 10.1038/s41559-020-1218-2 |
| Popis: | Global warming compels larger endothermic animals to adapt either physiologically or behaviourally to avoid thermal stress, especially in tropical ecosystems. Their adaptive responses may however be compromised by other constraints, such as predation risk or starvation. Using an exceptional camera-trap dataset spanning 32 protected areas across southern Africa, we find that intermediate-sized herbivores (100–550 kg) switch activity to hotter times of the day when exposed to predation by lions. These herbivores face a tight window for foraging activity being exposed to nocturnal predation and to heat during the day, suggesting a trade-off between predation risk and thermoregulation mediated by body size. These findings stress the importance of incorporating trophic interactions into climate change predictions. Rising temperatures and predator avoidance constrain herbivore activity on the southern African savannas, forcing them into ever-tightening windows of activity, in a ‘timescape of fear’. |
| Databáze: | OpenAIRE |
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