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Wild Nematode Towers Reveal Collective Dispersal Strategy

Larval roundworms sense environmental cues to build living structures that attach to insects for group transport to fresh resources

Overview

  • Researchers filmed nematode towers in decaying apples and pears in Konstanz orchards, confirming that the behavior occurs in nature
  • Each structure is formed exclusively by dauer-stage larvae of a single nematode species when food is scarce and competition intensifies
  • Towers can extend exploratory arms to bridge gaps and react to touch by growing toward stimuli such as passing fruit flies
  • Laboratory trials with Caenorhabditis elegans showed that hungry larvae assemble towers on a toothbrush bristle within two hours, mirroring field observations
  • The discovery establishes a new model for studying the ecology and evolution of collective dispersal in microscopic animals