Modelling pollination ecosystem service potential

assessment of habitat suitability for wild bees at regional level with the involvement of stakeholders

verfasst von

Malte Hinsch

betreut von

Benjamin Felix Burkhard

Abstract

Pollination by insects, especially wild bees, is an important ecosystem service that plays a crucial role in providing food for humans and animals, but also for the functionality and biodiversity of ecosystems. For some years now, however, wild bee populations have been experiencing a steady decline, which is jeopardising these services. The reasons for this decline are manifold and range from diseases, pests and invasive species to climate change and active and passive human influences. The factors with the greatest impact are probably land-use change and land-use intensification, which disturb or even destroy wild bee habitats, for instance through urban sprawl and the intensification of agricultural use. Knowledge about the location of such wild bee habitats is therefore crucial in order to be able to actively protect or restore them through measures or non-utilisation. The overall aim of this thesis is to adapt existing models for determining habitat suitability (HE) for wild bees to the regional scale and to make the results usable for local decision-makers (EGT). Specifically, in this work 1) the influence of the model selection and the input data to be used on the model results were analysed, 2) the habitat suitability model (HEM) selected hereafter was adapted to the regional scale and 3) the influence of different result representations on the usability by EGT and their engagement was analysed and the influence of these on the model development was investigated. In the first step, the two HSM InVEST and ESTIMAP models are used with input data of different levels of detail and the results are analysed with regard to their significance and applicability. As a result, the ESTIMAP model together with the detailed biotope type data is best suited for scientific analyses, which is why the ESTIMAP model was adapted to the regional scale in the second step. For this purpose, the influence of the ecosystem condition was analysed as an additional model parameter and the results showed that the implementation of this parameter specifies the results and increases the informative value and thus shows a more heterogeneous picture of the HE in the landscape. In the final step, the results were checked for plausibility by wild bee experts and communicated to EGT using different forms of visualisation. This revealed that habitat suitability maps are a suitable tool for EGTs and that active methods are best suited to integrating EGTs into a project and strengthening engagement.

Organisationseinheit(en)

Abteilung Physische Geographie und Landschaftsökologie
AG Physische Geographie
Institut für Physische Geographie und Landschaftsökologie

Typ

Dissertation

Anzahl der Seiten

131

Publikationsdatum

02.07.2025

Publikationsstatus

Veröffentlicht

Ziele für nachhaltige Entwicklung

SDG 3 – Gute Gesundheit und Wohlergehen, SDG 13 – Klimaschutzmaßnahmen, SDG 15 – Lebensraum Land

Elektronische Version(en)

https://doi.org/10.15488/19221 (Zugang: Offen)