Research Group Geoecology
Research of the Geoecology group focusses on past, present and potential future effects of environmental drivers on species, assemblages and ecosystems on a wide range of spatial and temporal scales. We study topics as different as the ecology and biogeography of specialized species and organism-groups, such as aquatic macroinvertebrates inhabiting spring habitats, long-term ecosystem development and past and ongoing species distribution changes reconstructed from biotic indicators (e.g. diatoms, pollen, chironomids, cladocerans). The reconstruction of past climatic and other environmental changes based on biotic assemblages and stable isotope analyses of microfossils in natural archives is a further focus of our research group.
Our research is intrinsically interdisciplinary with close links to Palaeoecology and Ecology, Biogeography, Biogeosciences, Climate Change Research, and Quaternary Geology. Members of the Geoecology group teach in both Geosciences and Integrative Biology.
Research on environmental reconstruction in the Geoecology group focusses on using palaeoecological indicators in natural archives such as lake sediments to reconstruct past ecological and environmental change. Recent and ongoing projects assess, e.g., long-term ecosystem development, changes in carbon and nutrient cycling in lake ecosystems, early and recent human impacts on lakes and landscapes or past climatic changes based on biotic indicators. A particular focus is also on studying the response of ecological systems (e.g. species assemblages, species distributions, ecosystem states) in the modern environment to improve and quantify environmental reconstructions based on biotic indicators.
We are interested in a profound understanding of the function of springs as natural habitats. Springs are transitional at the interface between surface water and groundwater and unique habitats due to their special abiotic conditions. Due to their use for drinking water the number of natural springs decreased significantly during the past century, and springs are endangered habitats in Switzerland. In addition, alpine springs are particularly endangered by ongoing climate change and their ecology has only insufficiently been investigated. Further anthropogenic stressors for springs and small freshwater streams are pesticide contamination and structural changes in the waterbodies.