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Title (Primary) Temperature management potentially affects carbon mineralization capacity and microbial community composition of a shallow aquifer
Author Metze, D.; Popp, D.; Schwab, L.; Keller, N.-S.; Nunes da Rocha, U.; Richnow, H.-H.; Vogt, C.;
Journal FEMS Microbiology Ecology
Year 2021
Department ISOBIO; UMB;
Volume 97
Issue 2
Language englisch;
Supplements https://oup.silverchair-cdn.com/oup/backfile/Content_public/Journal/femsec/97/2/10.1093_femsec_fiaa261/1/fiaa261_supplemental_files.zip?Expires=1616148542&Signature=RyAoOVWQmSvWx2A32F83~MfNuiGMviB1apqWFD0zyFjzJqWYDpVF73URrWw-TwJT7R8BnToxJ2MJNkwQgRjRKWd3r-fnz1FCqomuqWikgAt7TNqnpsnpJyhPA4CTZ3OGzoqE0nQixX~Awex1uLMoVClAUcTB-yOffrHkr8GQlVD3r72Tb31PaZNmBpyPOP50IZCIVw4ReGViM9cSzBmrZwzlJph8PJMOWjoMTRC-Tmh08lEenSs5zCauiUd9MyXn~D6ZyynZVyQ4R40sbpCGXDbSJVEFxz2s2FuDzj3KPeU3lBCmrsvOqwTJWyCNmdiZ1zfKD1j7MKGeCRlp70mtxg__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA
Keywords aquifer thermal energy storage; groundwater microbial ecology; microbial community changes; thermophilic community adaptation; acetate mineralization
Abstract High-temperature aquifer thermal energy storage (HT-ATES) is a promising technique to reduce the CO2 footprint of heat supply in the frame of transitioning to renewable energies. However, HT-ATES causes temperature fluctuations in groundwater ecosystems potentially affecting important microbial-mediated ecosystem services. Hence, assessing the impact of increasing temperatures on the structure and functioning of aquifer microbiomes is crucial to evaluate potential environmental risks associated with HT-ATES. In this study, we investigated the effects of temperature variations (12–80°C) on microbial communities and their capacity to mineralize acetate in aerobically incubated sediment sampled from a pristine aquifer. Compared to natural conditions (12°C), increased acetate mineralization rates were observed at 25°C, 37°C and 45°C, whereas mineralization was decelerated at 60°C and absent at 80°C. Sequencing of 16S rRNA genes revealed that the bacterial diversity in acetate-amended and non-acetate-amended sediments decreased with rising temperatures. Distinct communities dominated by bacterial groups affiliated with meso- and thermophilic bacteria established at 45°C and 60°C, respectively, while the number of archaeal phylotypes decreased. The changes in microbial diversity observed at 45°C and 60°C indicate a potential loss of ecosystem functioning, functional redundancy and resilience, while heat storage at 80°C bears the risk of ecological collapse.
ID 24238
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24238
Metze, D., Popp, D., Schwab, L., Keller, N.-S., Nunes da Rocha, U., Richnow, H.-H., Vogt, C. (2021):
Temperature management potentially affects carbon mineralization capacity and microbial community composition of a shallow aquifer
FEMS Microbiol. Ecol. 97 (2), fiaa261