Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1029/2024JG008549 |
Lizenz  |
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| Titel (primär) | From soil to sediment: Bedform migration shapes microbial communities from eroding bank soil during terrestrial–aquatic regime shift |
| Autor | Oprei, A.; Franzmann, I.; Schreckinger, J.; Mutz, M.; Risse-Buhl, U. |
| Quelle | Journal of Geophysical Research-Biogeosciences |
| Erscheinungsjahr | 2025 |
| Department | FLOEK |
| Band/Volume | 130 |
| Heft | 10 |
| Seite von | e2024JG008549 |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Daten-/Softwarelinks | https://doi.org/10.5281/zenodo.13963953 |
| Supplements | Supplement 1 |
| Keywords | bank erosion; sediment transport; biofilm; terrestrial–aquatic transition; microbial activity; community structure |
| Abstract | Soil erosion from riverbanks is a common phenomenon in sandy streams and rivers and has intensified in the last decades due to land use change. When entering the aquatic environment, incoming soil is mixed with benthic sediments, and the microbial community undergoes a terrestrial–aquatic transition. Aquatic sediments in sand-dominated streams are frequently transported as migrating ripples, where microbes adhering to sand grains experience migrating-resting cycles in the range of minutes to hours. Despite the ubiquitous co-occurrence of riverbank erosion and migrating bedforms in sand-dominated streams, we lack a general understanding of how sediment transport at low flow influences the terrestrial–aquatic habitat transition. In a microcosm experiment, we compared purely aquatic sediment with a mix from riverbank soil and aquatic sediment. We tested the effect of simulated ripple migration on both sediment types compared to stationary conditions. We estimated α- and β-diversity, abundance, community respiration, and net ecosystem production for bacteria, fungi, and diatoms. Our results show that high richness and abundance of the terrestrial community, especially fungi, were lost after the aquatic transition. The succession of bacteria and fungi, which behaved more like habitat specialists, was not measurably influenced by sediment transport, but showed a distinct shift from a terrestrial to an aquatic community. In contrast, the diatom community was dominated by habitat generalists. Final community respiration and net ecosystem production in the mixed sediments were lower compared to aquatic sediments. Our findings highlight that further studies need to include spatiotemporal patterns of sediment transport when investigating terrestrial–aquatic habitat transitions. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=31604 |
| Oprei, A., Franzmann, I., Schreckinger, J., Mutz, M., Risse-Buhl, U. (2025): From soil to sediment: Bedform migration shapes microbial communities from eroding bank soil during terrestrial–aquatic regime shift J. Geophys. Res.-Biogeosci. 130 (10), e2024JG008549 10.1029/2024JG008549 |
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