TY - GEN A1 - Risse-Buhl, Ute A1 - Karsubke, Martina A1 - Schlief, Jeanette A1 - Baschien, Christiane A1 - Weitere, Markus A1 - Mutz, Michael T1 - Aquatic protists accelerate microbial activity associated with mineral surfaces and leaf litter T2 - Aquatic Microbial Ecology KW - stream biofolm Y1 - 2012 U6 - https://doi.org/10.3354/ame01564 SN - 0948-3055 VL - 66 IS - 2 SP - 133 EP - 147 ER - TY - GEN A1 - Risse-Buhl, Ute A1 - Herrmann, Martina A1 - Lange, Patricia A1 - Akob, Denise M. A1 - Pizani, Natalia A1 - Schönborn, Wilfried A1 - Totsche, Kai Uwe A1 - Küsel, Kirsten T1 - Phagotrophic protist diversity in the groundwater of a karstified aquifer - morphological and molecular analysis T2 - Journal of Eukaryotic Microbiology Y1 - 2013 U6 - https://doi.org/10.1111/jeu.12054 SN - 1550-7408 VL - 60 IS - 5 SP - 467 EP - 479 ER - TY - GEN A1 - Risse-Buhl, Ute A1 - Felsmann, Katja A1 - Mutz, Michael T1 - Colonization dynamics of ciliate morphotypes modified by shifting sandy sediments T2 - European Journal of Protistology KW - Ciliophora Y1 - 2014 U6 - https://doi.org/10.1016/j.ejop.2014.03.006 SN - 0932-4739 VL - 50 IS - 4 SP - 345 EP - 355 ER - TY - GEN A1 - Risse-Buhl, Ute A1 - Trefzger, N. A1 - Seifert, A.-G. A1 - Schönborn, Wilfried A1 - Gleixner, G. A1 - Küsel, Kirsten T1 - Tracking the autochthonous carbon transfer in stream biofilm food webs T2 - FEMS Microbiology Ecology KW - biofilm Y1 - 2012 U6 - https://doi.org/10.1111/j.1574-6941.2011.01202.x SN - 1574-6941 VL - 79 IS - 1 SP - 118 EP - 131 ER - TY - GEN A1 - Lazzaro, Anna A1 - Risse-Buhl, Ute A1 - Brankatschk, Robert T1 - Molecular and morphological snapshot characterisation of the protist communities in contrasting alpine glacier forefields T2 - Acta Protozoologica KW - Ciliates Y1 - 2015 SN - 0065-1583 SN - 1689-0027 VL - 54 IS - 2 SP - 143 EP - 154 ER - TY - GEN A1 - Risse-Buhl, Ute A1 - Schlief, Jeanette A1 - Mutz, Michael T1 - Phagotrophic protists are a key component of microbial communities processing leaf litter under contrasting oxic conditions T2 - Freshwater Biology KW - aquatic fungi KW - ciliates Y1 - 2015 U6 - https://doi.org/10.1111/fwb.12657 SN - 1365-2427 VL - 60 IS - 11 SP - 2310 EP - 2322 ER - TY - GEN A1 - Risse-Buhl, Ute A1 - Mendoza-Lera, Clara A1 - Norf, Helge A1 - Perez, Javier A1 - Pozo, Jesus A1 - Schlief, Jeanette T1 - Contrasting habitats but comparable microbial decomposition in the benthic and hyporheic zone T2 - Science of The Total Environment KW - Ecosystem functioning KW - Microbial community Y1 - 2017 UR - https://authors.elsevier.com/a/1VJ2tB8ccclgC U6 - https://doi.org/10.1016/j.scitotenv.2017.06.203 SN - 0048-9697 VL - 605-606 SP - 683 EP - 691 ER - TY - GEN A1 - Oprei, Anna A1 - Schreckinger, José A1 - Kholiavko, Tatiana A1 - Frossard, Aline A1 - Mutz, Michael A1 - Risse-Buhl, Ute T1 - Functional and structural recovery of stream biofilms at the ha-bitat scale is based on the individual disturbance history T2 - 35. Jahrestagung der Deutschen Gesellschaft für Limnologie e.V. (DGL) und der Societas Internationalis Limnologiae (SIL) in Münster, 23.–27. September 2019, Abstractband KW - benthic communities Y1 - 2019 UR - http://www.dgl2019-muenster.de/assets/abstractband_dgl2019.pdf SP - 72 EP - 73 ER - TY - GEN A1 - Wonner, Tamara A1 - Oprei, Anna A1 - Mutz, Michael A1 - Risse-Buhl, Ute T1 - Is the epipsammic community modulated by trajectory of historic or current sediment shifting? T2 - 35. Jahrestagung der Deutschen Gesellschaft für Limnologie e.V. (DGL) und der Societas Internationalis Limnologiae (SIL) in Münster, 23.–27. September 2019, Abstractband KW - Sandy streambed sediments Y1 - 2019 UR - http://www.dgl2019-muenster.de/assets/abstractband_dgl2019.pdf SP - 167 EP - 168 ER - TY - GEN A1 - Wonner, Tamara A1 - Oprei, Anna A1 - Mutz, Michael A1 - Risse-Buhl, Ute T1 - Is the epipsammic community modulated by trajectory of historic or current sediment shifting? T2 - Ergebnisse der Jahrestagung 2019 in Münster KW - Microbial communities Y1 - 2020 UR - https://www.dgl-ev.de/cms/upload/dokumente/Publikationen/2020__DGL_Ergebnisse_Muenster_2019_web.pdf SN - 978-3-9818302-4-8 SP - 418 PB - Eigenverlag der DGL CY - Essen ER - TY - GEN A1 - Kryvokhyzhyna, Mariia A1 - Majdi, Nabil A1 - Oprei, Anna A1 - Mutz, Michael A1 - Risse-Buhl, Ute T1 - Response of meiobenthos to migrating ripples in sandy lowland streams T2 - Hydrobiologia KW - Sediment transport KW - Community structure KW - Benthic invertebrates Y1 - 2022 UR - https://link.springer.com/content/pdf/10.1007/s10750-022-04836-6.pdf U6 - https://doi.org/10.1007/s10750-022-04836-6 SN - 0018-8158 VL - 849 IS - 8 SP - 1905 EP - 1921 ER - TY - GEN A1 - Risse-Buhl, Ute A1 - Oprei, Anna A1 - Mutz, Michael T1 - Streambed migration frequency drives ecology and biogeochemistry across spatial scales T2 - WIREs Water KW - benthic and hyporheic communities KW - environmental filtering Y1 - 2023 U6 - https://doi.org/10.1002/wat2.1632 SN - 2049-1948 VL - 10 IS - 3 ER - TY - GEN A1 - Scheidweiler, David A1 - Mendoza-Lera, Clara A1 - Mutz, Michael A1 - Risse-Buhl, Ute T1 - Overlooked Implication of Sediment Transport at Low Flow: Migrating Ripples Modulate Streambed Phototrophic and Heterotrophic Microbial Activity T2 - Water Resources Research KW - microbial communities Y1 - 2021 U6 - https://doi.org/10.1029/2020WR027988 SN - 1944-7973 VL - 57 IS - 3 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 - Risse-Buhl, Ute A1 - Oprei, Anna A1 - Mutz, Michael T1 - Migrating streambeds – ecological and biogeochemical consequences of fine sediment transport T2 - Deutsche Gesellschaft für Limnologie e.V., Ergebnisse der Jahrestagung in Leipzig 2021 KW - Running waters ecosystems Y1 - 2022 UR - https://www.dgl-ev.de/publikationen/dgl-tagungsbaende/tagungsberichte.html SN - 978-3-9818302-6-2 SP - 192 PB - Eigenverlag der DGL CY - Essen ER - TY - GEN A1 - Oprei, Anna A1 - Schreckinger, José A1 - Kholiavko, Tatiana A1 - Mutz, Michael A1 - Risse-Buhl, Ute T1 - Variability of functional stream biofilm recovery at the habitat scale after disturbances from drying and sediment transport T2 - 11th Symposium for European Freshwater Sciences, June 30–July 5, 2019, Zagreb, Croatia, SEFS11 Abstract book KW - Microbial communities Y1 - 2019 UR - http://www.sefs11.biol.pmf.hr/wp-content/uploads/2019/07/Book-of-abstract.pdf SP - 338 ER - TY - GEN A1 - Risse-Buhl, Ute A1 - Hagedorn, Frank A1 - Dümig, Alexander A1 - Gessner, Mark O. A1 - Schaaf, Wolfgang A1 - Nii-Annang, Seth A1 - Gerull, Linda A1 - Mutz, Michael T1 - Dynamics, chemical properties and bioavailability of DOC in an early successional catchment T2 - Biogeosciences Discussion KW - DOC KW - bioavailability Y1 - 2013 SN - 1810-6285 VL - 10 IS - 1 SP - 1011 EP - 1049 ER - TY - CHAP A1 - Risse-Buhl, Ute A1 - Nii-Annang, Seth A1 - Hagedorn, Frank A1 - Schaaf, Wolfgang A1 - Dümig, Alexander A1 - Schloter, Michael A1 - Gessner, Mark O. A1 - Mutz, Michael T1 - Can old organic carbon drive microbial activity in surface waters of a newly created landscape? T2 - Structures and processes of the initial ecosystem development, 1st International Conference assoc. with 4th Meeting of Young Researchers in Earth Sciences (MYRES), 20-24 Sept. 2010, Cottbus, Germany Y1 - 2010 SP - S. 93 PB - BTU CY - Cottbus ER - TY - GEN A1 - Risse-Buhl, Ute A1 - Hagedorn, Frank A1 - Dümig, Alexander A1 - Gessner, Mark O. A1 - Schaaf, Wolfgang A1 - Nii-Annang, Seth A1 - Gerull, Linda A1 - Mutz, Michael T1 - Dynamics, chemical properties and bioavailability of DOC in an early successional catchment T2 - Biogeosciences Y1 - 2013 U6 - https://doi.org/doi:10.5194/bg-10-4751-2013 SN - 1726-4189 VL - 10 SP - 4751 EP - 4765 ER - TY - GEN A1 - Oprei, Anna A1 - Schreckinger, José A1 - Kholiavko, Tatiana A1 - Frossard, Aline A1 - Mutz, Michael A1 - Risse-Buhl, Ute T1 - Long-term functional recovery and associated microbial community structure after sediment drying and bedform migration T2 - Frontiers in Ecology and Evolution N2 - Climate change and erosion from agricultural areas cause increased drying periods and bedform migration of riverbeds, respectively, worldwide. Both sediment drying and bedform migration can independently stress the microbial community residing in the riverbed. Here, we investigated the microbial response after exposure to these stressors with a focus on long-term recovery. We conducted an in situ experiment to investigate the long-term (8 months) functional and structural recovery of benthic microbial communities from either sediment drying (episodic severe stressor) or bedform migration (frequent moderate stressor). Stressed sediment associated communities were rewetted (dried sediments) and immobilized (migrated sediments) and exposed in the River Spree (north-eastern Germany) to initiate the recovery process. We then evaluated the microbial function (community respiration, net community production and extracellular enzymatic activities) as well as the bacterial, fungal and diatom community structure (16S rRNA gene and ITS region metabarcoding, and microscopic diatom morphotype classification). We observed different recovery times for community respiration (less than 7 days) and gross primary production (more than 5 months), implying a shift toward net heterotrophy in the first few months after stress exposure. Similarly, we observed a strong autotrophic community response (particularly associated with the diatoms Navicula and Fragilaria), especially in migrated sediments. The bacterial and fungal community response to sediment drying was stronger than to bedform migration (particularly associated with the bacterium Flavobacterium and the fungi Alternaria sp. and Aureobasidium pullulans). Our results show that sediment drying and bedform migration had a significant impact on the microbial community function and structure, which persisted for several months after the stress. Due to the surprising long period of recovery, successive stress events combined with seasonal effects will likely hamper the ongoing recovery process with severe alterations to the microbial function and structure. These findings extend the concept of ecosystem resilience and stability on the dimensions of timescale and seasonal environmental variations. Legacy effects are expected to play a key role when facing future stress. Y1 - 2023 UR - https://www.frontiersin.org/articles/10.3389/fevo.2023.1112519/full U6 - https://doi.org/10.3389/fevo.2023.1112519 SN - 2296-701X VL - Vol. 11 ER - TY - CHAP A1 - Risse-Buhl, Ute A1 - Hagedorn, Frank A1 - Dümig, Alexander A1 - Gessner, Mark O. A1 - Schaaf, Wolfgang A1 - Nii-Annang, Seth A1 - Gerull, Linda A1 - Mutz, Michael ED - Jeltsch, Florian ED - Joshi, Jasmin T1 - Dynamics, chemical properties and bioavailability of DOC in an early successional catchment T2 - GfÖ 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany N2 - The dynamics of dissolved organic carbon (DOC) have been intensively studied in mature ecosystems, but little is known about DOC dynamics and the significance of DOC as a substrate for microbial activity in early-successional catchments. We determined the concentration, chemical composition, radiocarbon age, and bioavailability of DOC along the hydrological flow path from soil solution to a downstream pond in a recently constructed catchment (Chicken Creek Catchment, Germany). Soil solution, upwelling ground water, subsurface water in an alluvial fan, and pond water all had high DOC concentrations (averaged 6.0 – 11.6 mg DOC L‐1), despite small carbon stocks in either vegetation or soil of the catchment. The mean 14C age of DOC in upwelling ground water was 2600 to 2800 years. Solid-state CPMAS 13C NMR revealed a higher proportion of aromatic compounds (32%) and a lower proportion of carbohydrates (33%) in upwelling ground water compared to pond water (18% and 45%, respectively). 14C age and 13C NMR spectra suggest that DOC was partly mobilized from charred organic matter inherent in the Quaternary substrate. In a 70-days incubation experiment, 20% of the total DOC was found to be bioavailable, irrespective of the water type. Origin of the microbial communities within the catchment (enriched from soil, stream sediment or pond water) had only marginal effects on overall DOC utilization. Overall, our data suggest that both recent and old DOC support microbial activity during early ecosystem succession, although a large fraction of the DOC is recalcitrant and eventually exported from the catchment once it has been mobilized. Y1 - 2013 SP - S. 377 PB - Gesellschaft für Ökologie CY - Berlin ER -