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Oberfl?chennahe Geothermie und ihre potenziellen Auswirkungen auf Grundwasser?kosysteme |
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| Authors: | Dr Heike Brielmann Dr Tillmann Lueders Dipl Biol Kathrin Schreglmann MSc Francesco Ferraro Dipl-Biol Maria Avramov Dipl-Biol Verena Hammerl Jun-Prof Dr Philipp Blum Dr Peter Bayer Dr Christian Griebler |
| Affiliation: | 1. Institut f??r Grundwasser?kologie, Helmholtz Zentrum M??nchen, Ingolst?dter Landstr. 1, 85764, Neuherberg, Deutschland 2. Zentrum f??r Angewandte Geowissenschaften, Universit?t T??bingen, Sigwartstr. 10, 72076, T??bingen, Deutschland 3. Institut f??r Umweltingenieurwissenschaften, ETH Z??rich, Schafmattstr. 6, 8093, Z??rich, Schweiz 4. Institut f??r Boden?kologie, Helmholtz Zentrum M??nchen, Ingolst?dter Landstr. 1, 85764, Neuherberg, Deutschland 5. Institut f??r Angewandte Geowissenschaften, KIT ?C Karlsruher Institut f??r Technologie, Kaiserstr. 12, 76131, Karlsruhe, Deutschland 6. Geologisches Institut, ETH Z??rich, Sonneggstrasse 5, 8092, Z??rich, Schweiz |
| Abstract: | The use of shallow geothermal energy is a thriving technology. Still, its impact on the ecology of subsurface habitats has not been adequately investigated. Biological processes are substantially influenced by temperature. In field and laboratory investigations comprising a temperature range from 2 to 45?°C we show, that the diversity and structure of aquifer microbial communities is significantly influenced by temperature. Microbial biomass and activities are shown to additionally depend on the availability of nutrients and substrates in the groundwater. Selected groundwater invertebrates exhibited little tolerance towards mid- and long-term exposure to increased temperatures. Our results allow first recommendations towards the design, authorization, construction and operation of shallow geothermal energy facilities in an ecologically sustainable way. |
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