Ground-nesting bees & Evidence-based conservation

Research Projects

Current research projects

Understanding and managing soil health impacts to protect soil-dependent
pollinators (ProPollSoil)
https://propollsoil.eu

In ProPollSoil, we aims to enhance our understanding of the relationship between soil health and soil-dependent pollinators. We specifically focus on lesser-known species and groups, such as ground-nesting bees, wasps, hoverflies, ants or beetles. ProPollSoil will identify how intensive soil management practices and contamination, threatening both pollinator and soil health, contribute to the decline of soil-dependent pollinators. This knowledge will be used to inform sustainable soil practices and guide conservation and restoration efforts. We will (i) conduct a pan-European field sampling campaign, including SOB4ES sites, (ii) develop novel monitoring methods, including eDNA and AI, (iii) perform lab studies to fill existing knowledge gaps, such as the role soil microbiota, (iv) assess intensive management, soil compaction and soil pollution as potential soil and pollinator threats within a co-creation research approach in nine Case Study Areas (CSAs), and (v) use different modelling approaches to produce EU-wide maps of soil substrate availability and hence pollinator suitability. Our multi-disciplinary team involves experts in soil science, pollinator ecology and biology, biodiversity monitoring, big data, social sciences, modelling and ecotoxicology.

The project will last from 2025 till 2029 and is funded as a EU Horizon 2020 project. Thalea Stuckenberg, Elisa Schenkel, Julie Sheard, from June 2026 a new PhD student and myself will contribute to the realization of the project as members of our team.

More information can be found on the ProPollSoil Webpage

Evaluating agricultural and food policies leading to transformation
pathways towards a biodiversity-friendly land- use and food system (BEATLE):
Quantifying the land-use impacts on biodiversity and ecosystem services

BEATLE Team, October 2022

In the junior research group BEATLE, we will look at the economic impact of management measures leading to changes in biodiversity and ecosystem functioning in the agricultural landscapes. We integrate ecological and economic knowledge using results from meta-analyses to inform economic simulation models and scenarios developed by stakeholders from farming and nature conservation communities across Germany. With this project we look at the economic impact of agricultural land-use on biodiversity and ecosystem functioning.

The project will last from 2022 till 2027 and is funded by the ‘German Federal Ministry of Education and Research’, as part of a FONA socio-ecological junior research group (BEATLE). The project is realized in the PhD project of Viviana Alarcon-Segura.

Ground-nesting wild bees in flower strips and the influence of ploughing on bee nests

In this project, we will look at differences between annual and perennial flower strips in the agricultural landscape in Baden-Württemberg. We particularly focus at the effects of ploughing on wild bees that nest below ground.

The project will last from 2022 till 2024 and is funded by the ‘Ministry of the Environment, Climate Protection and Energy Sector, Baden-Württemberg’, the project is realized in the PhD project of Christopher Hellerich

Effects of sand-hills on bee communities

Flower strips are established in several communities in the Natupark Schwarzwald Mitte/Nord in this project since 2018. In February 2022, 7 sites were additionally equipped with sand lenses to support ground-nesting bees and provide nest sites. We have assess bee communities in flower strips and additionally observe which bees use sand lenses for nesting.

Initiated and funded by Naturpark Schwarzwald Mitte/Nord and the initiative Bluehender Naturpark project has started in 2022. Since then, we evaluate the success of the sand-hills on an annual basis, currently in the 4th year (spring 2025).

Past research projects

Faktencheck Artenvielfalt (fact-checking biodiversity)

In the project “Faktencheck Artenvielfalt” (fact-checking biodiversity), part of the initiative of the German Federal Ministry of Education and Research to sustain biodiversity, we will assess and synthesize the current knowledge about declining diversity in different ecosystems in Germany. We will further identify drivers responsible for the decline and measures to halt and reverse the decline. Our aim is to provide a national assessment about biodiversity in Germany.  This work will directly follow up on the statement funded and published by the German Academy of Sciences, Leopoldina: “Biodiversity and Management of Agricultural Landscapes”.

The project will last from 2021 till 2026 and is funded by the ‘German Federal Ministry of Education and Research’, as part of their research initiative to maintain biodiversity (FEdA)

Ground-nesting wild bee survival in disturbed soils: towards a more evidence-based conservation

Translocated spring mining bee (Colletes cunicularius, male)

In this project, we synthesize the current knowledge of ground-nesting wild bee survival after soil disturbance and use experimental studies to further increase the knowledge on ground-nesting wild bees. In a field experiment, the effects of tillage in flower strips, one of the currently most important conservation measures for wild bees will be analysed. Further, methods available for wild bee translocation will be improved and the establishment of ground-nesting bee communities in a new location will be investigated. In the last part of this project, I will link my results to conservation and identify how practitioners look for scientific evidence and what they perceive as relevant to inform their actions, such as the for the conservation of wild bees.