Dynafor présent à la 15ᵉ conférence SER-E

Amandine Acloque et Manon Hess ont participé à la 15ᵉ Conférence Européenne sur la Restauration Écologique (SER-E) qui a eu lieu à Brest du 24 au 28 août 2026. Elles y ont présenté respectivement une communication orale sur les résultats du projet de recherche RestPoll qui se termine et les premiers résultats du projet de recherche RESPIR qui démarre.

Voilà le détail des 2 interventions extraites des actes du colloque disponible en téléchargement ici:

1°) Acloque, A.; Andrieu, E.; Costaz, T.; Demeter, I.; (...) Ollivier, M.; (...) Ouin, A. (2026) « Restoration of plant-flower visitor networks with pollinator conservation measures » à la 15ᵉ Conférence Européenne sur la Restauration Écologique, 24-28 août 2026, Brest, France (communication orale)

Abstract:

Ecological restoration is a key strategy for mitigating ongoing pollinator declines. While the addition of floral resources is acknowledged to benefit pollinators and enhance network complexity and functional redundancy, the contribution of non-floral resources, such as nesting sites, remains understudied despite their essential role in the establishment and persistence of wild bee populations. We hypothesize that the addition of nesting sites, without any changes in floral composition, may enhance bee diversity and thus affect interaction network properties. As part of the European research project RestPoll (”Restoring pollinator habitats across European agricultural landscapes”), we evaluated the overall effects of ecological restoration on plant-flower visitor interaction networks by comparing restored and unrestored sites, while also assessing the influence of the different restoration measures implemented within the project, through floral resources addition, nesting sites addition, and/or through bee-friendly practices implementation. A total of 159 sites (76 restored, 82 unrestored) across 7 countries (Germany, Spain, Hungary, France, United Kingdom, Sweden and Switzerland) was considered in 2024. For each site, we constructed bipartite flower-bee interaction networks by pooling data collected within the year. Network metrics, such as network size, nestedness and specialization, were computed and used as response variables in models to assess both the global effect of restoration and the effect of different restoration measure categories. Preliminary results suggest that restored sites support larger networks regardless the restoration measure. Furthermore, the combination of bee-friendly practices and resource addition appear to produce more specialized networks than the other implementation categories investigated.

2°) Hess, M.; Ladet, S.; Rakotoarindrazaka, N.; Beaumelle, L (2026) « Towards restoring diverse and functional grasslands: what roles for landscape structure and soil organisms? » à la 15ème Conférence Européenne sur la Restauration Écologique, 24-28 août 2026, Brest, France (poster)

Abstract:

The progressive recolonization of organisms within a restored site depends on species’ dispersal abilities, on the surrounding landscape acting as a reservoir and ecological corridor, and on active restoration practices such as the introduction of target species. Together, these fac-tors shape the trajectory through which biological communities reassemble. Yet, the combined effects of landscape context and soil biotic processes remain insufficiently understood, despite their central importance for explaining why some restorations succeed while others stagnate. This poster presents the RESPIR(1) project (2026–2030, funded by the French Biodiversity Agency (OFB)), which aims to fill this knowledge gap by examining how landscape properties, the presence of different edge types (forest-grassland, grassland-grassland), and the type of seed material used (commercial vs. locally sourced seeds) influence the joint dynamics of above- and below-ground communities and the key ecosystem functions of restored grasslands. The study relies on a network of 24 restored grasslands (2–18 years old) and 8 old grasslands (> 40 years old) located in South West of France (the Gers and Tarn et Garonne department, Occitanie), selected along a landscape gradient specifically constructed for this project. By presenting the project’s conceptual framework, objectives, and early insights from the construction of a landscape gradient using GIS(2), combining the calculation of composition and connectivity metrics, this poster showcases an advanced landscape-oriented approach that is still underused in restoration ecology.

(1) RESPIR: Restauration Ecologique des Systèmes Prairiaux et IntéRactions plante-sol

(2) GIS: Geographic Information System