Adrien Delavallade

Master in Biology

Research interests

Within an ecosystem, different actors interact in complex and multiple ways. Plants, also called primary producers, form the basis of the system and thus determine its structure. In order to interact with and through other trophic levels, plants use chemical compounds to communicate with their congeners, to attract pollinators, to defend themselves (toxin), but also to emit signals that attract parasitoids to cope with herbivore attacks. Therefore, the chemical composition of plants affects plant-insect and insect-insect interactions as well as the behaviour and physiology of herbivores through positive and negative effects. The chemical diversity of a plant community is consequently a key criterion when considering the functioning and biodiversity of an ecosystem.

The objective of this research project is to determine the extent to which variation in plant chemical diversity explains the abundance and diversity of the associated invertebrate community.

Thus, two types of plant communities were designed: one variant with low phytochemical diversity and a second variant with high phytochemical diversity. The diversity and abundance of aerial, terrestrial and underground arthropods are then assessed. The experiment is implanted along an altitudinal gradient to also estimate variations induced by climate change and by different biotic and abiotic pressures.

Main topics

  • Phytochemical diversity
  • Diversity and abundance of arthropods
  • Plant-insect interactions
  • Climate Change
  • Altitudinal gradient

Adrien Delavallade



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