Projects per year
Abstract
Carnivorous Nepenthes pitcher plants capture arthropods with specialized slippery surfaces. The key trapping surface, the pitcher rim (peristome), is highly slippery when wetted by rain, nectar or condensation, but not when dry. As natural selection should favour adaptations that maximize prey intake, the evolution of temporarily inactive traps seems paradoxical. Here, we show that intermittent trap deactivation promotes 'batch captures' of ants. Prey surveys revealed that N. rafflesiana pitchers sporadically capture large numbers of ants from the same species. Continuous experimental wetting of the peristome increased the number of non-recruiting prey, but decreased the number of captured ants and shifted their trapping mode from batch to individual capture events. Ant recruitment was also lower to continuously wetted pitchers. Our experimental data fit a simple model that predicts that intermittent, wetness-based trap activation should allow safe access for 'scout' ants under dry conditions, thereby promoting recruitment and ultimately higher prey numbers. The peristome trapping mechanism may therefore represent an adaptation for capturing ants. The relatively rare batch capture events may particularly benefit larger plants with many pitchers. This explains why young plants of many Nepenthes species additionally employ wetness-independent, waxy trapping surfaces.
Original language | English |
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Article number | 20142675 |
Number of pages | 8 |
Journal | Proceedings of the Royal Society B: Biological Sciences |
Volume | 282 |
Issue number | 1801 |
Early online date | 14 Jan 2015 |
DOIs | |
Publication status | Published - 22 Feb 2015 |
Keywords
- Nepenthes
- plant–insect interactions
- carnivorous plants
- prey capture
- peristome ‘aquaplaning’
- collective foraging
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Dive into the research topics of 'How to catch more prey with less effective traps: explaining the evolution of temporarily inactive traps in carnivorous pitcher plants'. Together they form a unique fingerprint.Projects
- 1 Finished
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Using real predators and robot prey to investigate the importance of predators in prey responses
1/10/13 → 30/09/18
Project: Research
Profiles
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Professor Christos C Ioannou
- School of Biological Sciences - Professor of Behavioural Ecology
- Animal Behaviour and Sensory Biology
Person: Academic , Member