TY - GEN A1 - Franzmann, Insa A1 - Schreckinger, José A1 - Oprei, Anna A1 - Mutz, Michael T1 - Mixed in - Sediment migration modulates the structural and functional colonisation of freshly incoming soil from bank erosion T2 - Deutsche Gesellschaft für Limnologie e.V., Ergebnisse der Jahrestagung in Leipzig 2021 KW - lowland rivers Y1 - 2022 UR - https://www.dgl-ev.de/publikationen/dgl-tagungsbaende/tagungsberichte.html SN - 978-3-9818302-6-2 SP - 94 PB - Eigenverlag der DGL CY - Essen ER - TY - GEN A1 - Schreckinger, José A1 - Mutz, Michael A1 - Franzmann, Insa A1 - Risse-Buhl, Ute T1 - Light or mechanics: What drives phototrophic and heterotrophic microbial activity in sandy sediments? T2 - Deutsche Gesellschaft für Limnologie e.V., Ergebnisse der Jahrestagung in Leipzig 2021 KW - migrating ripples Y1 - 2022 UR - https://www.dgl-ev.de/publikationen/dgl-tagungsbaende/tagungsberichte.html SN - 978-3-9818302-6-2 SP - 206 PB - Eigenverlag der DGL CY - Essen ER - TY - GEN A1 - Oprei, Anna A1 - Schreckinger, Jose A1 - Franzmann, Insa A1 - Lee, Hayoung A1 - Mutz, Michael A1 - Risse-Buhl, Ute T1 - Light over mechanics: microbial community structure and activity in simulated migrating bedforms are controlled by oscillating light rather than by mechanical forces T2 - FEMS Microbiology Ecology KW - community structure KW - light oscillation KW - metabolism Y1 - 2024 U6 - https://doi.org/10.1093/femsec/fiae073 SN - 0168-6496 SN - 1574-6941 VL - 100 IS - 6 ER - TY - GEN A1 - Oprei, Anna A1 - Franzmann, Insa A1 - Schreckinger, José A1 - Mutz, Micheal T1 - From soil to sediment : bedform migration shapes microbial communities from eroding bank soil during terrestrial–aquatic regime shift T2 - Journal of geophysical research: biogeosciences N2 - 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. KW - Sediment transport KW - Microbial community Y1 - 2025 U6 - https://doi.org/10.1029/2024JG008549 SN - 2169-8961 VL - 130 IS - 10 SP - 1 EP - 18 PB - Wiley CY - Hoboken, NJ ER -