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Pollination by ants: consequences of the quantitative effects on a mutualistic system
1Dpto. Biología Animal y Ecología, Facultad de Ciencias, Universidad de Granada, 18001, Granada, Spain.
Oecologia
|March 18, 2017
Summary
Worker ants (Proformica longiseta) are crucial pollinators for Hormathophylla spinosa in Spain. Despite reduced pollen viability, their high abundance and consistent visitation ensure a strong mutualistic interaction, boosting seed production.
Area of Science:
- Ecology
- Pollination Biology
- Entomology
Background:
- Understanding plant-pollinator interactions is vital for ecosystem health.
- Worker ants (Proformica longiseta) are common in high-mountain ecosystems.
- Hormathophylla spinosa is a mass-flowering plant in the Sierra Nevada.
Purpose of the Study:
- To analyze the role of worker ants as pollinators for Hormathophylla spinosa.
- To compare ant pollination with that of winged insects.
- To determine the contribution of ants to H. spinosa's reproductive success.
Main Methods:
- Quantified abundance and foraging behavior of Proformica longiseta and winged visitors.
- Conducted selective exclusion experiments to assess ant pollination efficacy.
- Examined pollen transfer and germination rates after ant contact.
Main Results:
- Proformica longiseta constituted over 80% of insect visitors to H. spinosa.
- Ants contacted reproductive organs, transferred pollen, but reduced germination rates.
- Exclusion experiments confirmed ants as significant contributors to viable seed production.
Conclusions:
- Worker ants are the primary pollinators for H. spinosa due to their abundance and predictability.
- The H. spinosa-P. longiseta mutualism is maintained by the high density of ants during flowering.
- Ants play a critical role in the reproductive success of this high-mountain plant.
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