Ecological Roles of Ants in Forest Ecosystems

Summary

Ants are among the most abundant and functionally diverse organisms in forest ecosystems, where they act as ecosystem engineers, mutualists, predators and seed dispersers. By constructing nest mounds, ants modify soil structure, enhance aeration and alter rates of nutrient cycling. Their foraging activities regulate populations of invertebrate prey and influence the dynamics of sap-feeding insects through mutualistic honeydew harvests. Certain ant species contribute to seed dispersal, particularly of myrmecochorous plants, and thereby shape patterns of plant recruitment and forest composition. Through their interactions with soil microbes, ants affect decomposition processes and the distribution of microbial communities. As keystone species in many temperate and boreal forests, ants can be sensitive indicators of forest health and management practices, with implications for biodiversity conservation and sustainable forestry.

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Ecological Roles of Ants in Forest Ecosystems publication trend

The graph below shows the total number of articles in ecological roles of ants in forest ecosystems across all publications each year (not limited to Nature Index journals).

Technical terms

Keystone species: A species that has a disproportionately large effect on ecosystem structure relative to its abundance.

Myrmecochory: Seed dispersal facilitated by ants, often involving attractive elaiosomes attached to seeds.

Polydomy: A colony organization strategy in which a single ant colony occupies multiple spatially separated nests.

Honeydew: Sugary excretions produced by sap-feeding insects that serve as an important carbohydrate resource for ants.

Canopy cover: The proportion of the forest floor shaded by the foliage of overstorey trees, influencing microclimate and habitat conditions.

References

  1. Re-Inventories at Two Study Sites in the Oberpfalz (Bavaria, Germany): Increase in RWA Nests, Herb Biodiversity and Dead Wood in Sustainably Managed Forests. Sustainability (2024).
  2. The Relationship between Canopy Cover and Colony Size of the Wood Ant Formica lugubris - Implications for the Thermal Effects on a Keystone Ant Species. PLOS ONE (2014).
  3. Forestry Alters Foraging Efficiency and Crop Contents of Aphid-Tending Red Wood Ants, Formica aquilonia. PLOS ONE (2012).
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