Mechanical defence in seeds to avoid predation by a granivorous ant

@article{Oliveras2008MechanicalDI,
  title={Mechanical defence in seeds to avoid predation by a granivorous ant},
  author={Jordi Oliveras and Crisanto G{\'o}mez and Josep Maria del Bas and Xavier Espadaler},
  journal={Naturwissenschaften},
  year={2008},
  volume={95},
  pages={501-506}
}
Harvester ants have traditionally been considered as seed predators that negatively affect plants. In some cases, however, they can also act as positive seed dispersers. During field observations, we noted that a portion of Psoralea bituminosa seeds that were collected and carried to the nest by the granivorous harvester ant Messor barbarus were discarded intact in refuse piles outside the nest. We analyzed and compared the physical characteristics of size, mass and toughness in P. bituminosa… Expand
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