Ant-Mediated Pollination Dynamics in Terrestrial Ecosystems

Ant–plant interactions in terrestrial ecosystems span a continuum from antagonism to mutualism, yet ant-mediated pollination remains relatively uncommon compared with insect and wind vectors. Ants possess morphological and behavioural traits—winglessness, ground-level foraging and cuticular secretions—that often limit their effectiveness as cross-pollinators. Nevertheless, mounting evidence indicates that certain plants have evolved specialised adaptations to either recruit or deter ant visitors in reproductive roles. Some angiosperms secrete rewards such as extrafloral nectaries or pollination drops, enabling ants to transfer pollen between flowers or even between distant individuals under pollen-limited conditions. Conversely, many species deploy physical defences—epicuticular wax layers, stem trichomes or slippery surfaces—to exclude ants and protect mutualisms with flying pollinators. Within ant–plant pollination networks, factors such as floral architecture, nectar chemistry and seasonal foraging patterns mediate whether ants promote geitonogamy (within-plant pollination) or genuine cross-pollination. The balance of ant contributions under varying ecological contexts influences plant reproductive success, community structure and resilience, particularly in the face of habitat alteration and invasive ant incursions.

Research from Nature Portfolio

Recent studies have investigated competitive interactions between ants and traditional pollinators on crop flowers. Work on Cucurbita maxima demonstrates that both native and invasive ant species interfere with the foraging behaviour of honey bees and other flying visitors. Ant presence reduces visitation rates and time spent per flower, with invasive ants exerting stronger interference competition than native species. These findings highlight how ant activity can disrupt specialist plant–pollinator mutualisms and point to the necessity of targeted management strategies to mitigate invasive ant impacts on pollination services.

Ant-Mediated Pollination Dynamics in Terrestrial Ecosystems publication trend

The graph below shows the total number of articles in ant-mediated pollination dynamics in terrestrial ecosystems across all publications each year (not limited to Nature Index journals).

Technical terms

Ambophily: A mixed pollination strategy involving both abiotic (wind) and biotic (insect) vectors.

Geitonogamy: Transfer of pollen between separate flowers on the same individual plant, leading to within-plant cross-fertilisation.

Epicuticular wax: A hydrophobic, lipid-rich coating on plant surfaces that influences insect adhesion and can deter unwanted visitors.

Pollination drop: A sugary ovular secretion produced by some gymnosperms to capture airborne pollen and attract animal visitors.

Interference competition: A form of competition in which one species directly impedes another’s access to resources or foraging opportunities.

References

1. Native and invasive ants affect floral visits of pollinating honey bees in pumpkin flowers (Cucurbita maxima). Scientific Reports (2021).
2. The Greasy Pole Syndrome in Alliaria petiolata (Brassicaceae): The Pubescence and Wax Coverage on Stems Reduce Invasion by Lasius niger Ants. Plants (2024).
3. Distance Dependent Contribution of Ants to Pollination but Not Defense in a Dioecious, Ambophilous Gymnosperm. Frontiers in Plant Science (2021).
4. Ants are more than just curious bystanders to some flowers—they act as significant pollinators. Frontiers in Insect Science (2023).