Flowers attract weaver ants that deter less effective pollinators
Article first published online: 29 OCT 2012
© 2012 The Authors. Journal of Ecology © 2012 British Ecological Society
Journal of Ecology
Volume 101, Issue 1, pages 78–85, January 2013
How to Cite
Gonzálvez, F. G., Santamaría, L., Corlett, R. T., Rodríguez-Gironés, M. A. (2013), Flowers attract weaver ants that deter less effective pollinators. Journal of Ecology, 101: 78–85. doi: 10.1111/1365-2745.12006
- Issue published online: 21 DEC 2012
- Article first published online: 29 OCT 2012
- Manuscript Accepted: 14 SEP 2012
- Manuscript Received: 26 APR 2012
- Ministerio de Ciencia e Innovación/FEDER. Grant Numbers: CGL2007-63223/BOS, CGL2010-16795
- CSIC. Grant Number: Pre_08_01008
- ambush predators;
- ant–plant interactions;
- ant repellents;
- Oecophylla smaragdina ;
- tritrophic interactions;
- reproductive ecology
1. Many flowers produce ant-repellent substances that prevent ants from discouraging pollinator visits. When a flower's most effective pollinator is unaffected by predatory ants, however, flowers should benefit from the presence of ants that deter less effective pollinators from consuming resources.
2. Behavioural assays revealed that Melastoma malabathricum flowers, pollinated by large carpenter bees, Xylocopa spp., produce ant attractants that recruit weaver ants, Oecophylla smaragdina.
3. The presence of ants was associated with an increase in the reproductive success of M. malabathricum flowers. This outcome likely resulted from the filtering effect of ants on the community of flower visitors: ants deter less effective pollinators and attract Xylocopa bees through an indirect effect on resource depletion.
4. Synthesis. Although plant–pollinator interactions are classified as mutualisms, not all flower visitors are effective pollinators, and some can be parasites or conditional parasites. As a result, predators that deter flower visitors can have positive or negative effects on plant fitness, depending on whether they deter all visitors or a subset of them, and on the relative effectiveness of deterred and undeterred visitors.