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Poster communications

Short-term impact of the island levelling in mid-Loire river on the recolonization by ground beetles

Abstract : Maintenance works are carried out on the Loire river. In this context, in 2012, one of the islands constituting the Nature Reserve of St-Mesmin (45) in France was leveled. Since 2013 a new sedimentary formation has been established, reforming the destroyed island. We studied the entomological impact of this work just after leveling. The colonization dynamic was monitored during the reformation of the island. We chose ground beetles as a model. Indeed, they are widely used in biodiversity studies and they colonize all riparian habitats including pioneer formations. We sampled four pioneer habitats on the island before and just after the leveling: dry and wet gravel, dry sand and mudflats. First results showed that ground beetles associated to these pioneer habitats were particularly reactive in the process of island recolonization. The dominant species before leveling have reappeared and have become equally abundant after the work. But for these habitats, we observe a decrease of species richness after leveling.
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Poster communications
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https://hal.inrae.fr/hal-02739068
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Submitted on : Tuesday, June 2, 2020 - 9:33:18 PM
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  • HAL Id : hal-02739068, version 1
  • PRODINRA : 375095

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Olivier Denux, Emmanuelle Dauffy-Richard, Aminata Ndiaye, Jean-Pierre Rossi, Sylvie Augustin. Short-term impact of the island levelling in mid-Loire river on the recolonization by ground beetles. I.S. Rivers, 2e conférence internationale "recherches et actions au service des fleuves et grandes rivières", Jun 2015, Lyon, France. 2015, 2e Conference International I.S. Rivers Integrative Sciences Recherches et Actions "Recherches et actions au service des fleuves et grandes rivières. Integrative sciences and sustainable development of rivers". Programme et résumés. Programme and abstracts. ⟨hal-02739068⟩

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