Skip to Main content Skip to Navigation
Theses

Effet de l’organisation spatiale intra-parcellaire des habitats sur le contrôle biologique par conservation : étude et modélisation des déplacements de dermaptères dans les bananeraies

Abstract : In this thesis, we investigated whether - and how - the intra-plot spatial patterns of habitats favourable to generalist predators could influence the conservation biological control (CBC) through their foraging behaviour. The general approach of this work is based on a modelling approach guided by experiments on the earwig E. caraibea, a generalist predator in banana fields of Martinique. In an experiment in banana fields, we found that the abundance and activity of earwigs seemed to be influenced by habitat types: banana tree residues appeared to be particularly more favourable to earwigs than bare soil.We developed a spatially explicit and individual-based model (Foragescape) of the foraging movements of an earwig-like predator in a banana field - based on the favourable or unfavourable nature of habitats. We found that the per-capita predator effect was strongly affected by a spatial dilution of predators, induced by favourable habitat addition, but this negative effect could be partially or fully mitigated by their spatial organisation.A key hypothesis of the Foragescape model was found on earwigs in a mesocosm experiment: earwigs movements are slower and more sinuous on residues, a favourable habitat, than on bare soil, an unfavourable habitat. Therefore, the model's predictions on spatial organisation and CBC can to some extent be adapted to the earwigs in banana fields.
Document type :
Theses
Complete list of metadatas

Cited literature [349 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-02502176
Contributor : Abes Star :  Contact
Submitted on : Monday, March 9, 2020 - 8:33:06 AM
Last modification on : Friday, October 23, 2020 - 4:37:52 PM
Long-term archiving on: : Wednesday, June 10, 2020 - 12:49:03 PM

File

fix_ZxajXqJ4.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-02502176, version 1

Collections

Relations

Citation

Blanche Collard. Effet de l’organisation spatiale intra-parcellaire des habitats sur le contrôle biologique par conservation : étude et modélisation des déplacements de dermaptères dans les bananeraies. Autre [q-bio.OT]. Université d'Avignon, 2019. Français. ⟨NNT : 2019AVIG0710⟩. ⟨tel-02502176⟩

Share

Metrics

Record views

92

Files downloads

66