Mathieu Lachaise

Position: Phd student

Team: Ecological Processes and human Impact

Contact details:
Laboratoire Écologie, Systématique et Évolution – IDEEV
Université Paris Saclay
Bât. 680 – 12, route 128
91190 Gif Sur Yvette

Tel: 06 16 62 54 29


Email: mathieu.lachaise (at)

Laboratoire Ecologie, Systématique et Evolution

Research interests

« Diversity of pollinators and pest controllers, and their ecosystem services in private gardens ».

Private gardens are significant green spaces for biodiversity in urban and peri-urban environments. They provide connectivity between natural/semi-natural habitats and offer essential nesting sites and resources for these organisms. However, private gardens remain understudied due to accessibility challenges.

During my thesis, I am studying the biodiversity of pollinators and pest controllers in private gardens in and around Orsay. Specifically, I am examining the impact of local factors (garden structure/composition, gardening practices) and landscape factors (distance to wooded areas, proportion of semi-natural spaces) on these organisms. I am also analyzing the ecosystem services provided by pollinators and pest controllers in these environments.

Laboratoire Ecologie, Systématique et Evolution


I teach for 3rd year students in ecology of ecosystems courses, University Paris-Saclay.

Laboratoire Ecologie, Systématique et Evolution

Career path

2021 – 2023 M2 research in ecology: Master Biodiversity, Ecology, Evolution, Sorbonne Université.