@misc{RisseBuhlKarsubkeSchliefetal., author = {Risse-Buhl, Ute and Karsubke, Martina and Schlief, Jeanette and Baschien, Christiane and Weitere, Markus and Mutz, Michael}, title = {Aquatic protists accelerate microbial activity associated with mineral surfaces and leaf litter}, series = {Aquatic Microbial Ecology}, volume = {66}, journal = {Aquatic Microbial Ecology}, number = {2}, issn = {0948-3055}, doi = {10.3354/ame01564}, pages = {133 -- 147}, language = {en} } @misc{RisseBuhlHerrmannLangeetal., author = {Risse-Buhl, Ute and Herrmann, Martina and Lange, Patricia and Akob, Denise M. and Pizani, Natalia and Sch{\"o}nborn, Wilfried and Totsche, Kai Uwe and K{\"u}sel, Kirsten}, title = {Phagotrophic protist diversity in the groundwater of a karstified aquifer - morphological and molecular analysis}, series = {Journal of Eukaryotic Microbiology}, volume = {60}, journal = {Journal of Eukaryotic Microbiology}, number = {5}, issn = {1550-7408}, doi = {10.1111/jeu.12054}, pages = {467 -- 479}, language = {en} } @misc{RisseBuhlFelsmannMutz, author = {Risse-Buhl, Ute and Felsmann, Katja and Mutz, Michael}, title = {Colonization dynamics of ciliate morphotypes modified by shifting sandy sediments}, series = {European Journal of Protistology}, volume = {50}, journal = {European Journal of Protistology}, number = {4}, issn = {0932-4739}, doi = {10.1016/j.ejop.2014.03.006}, pages = {345 -- 355}, language = {en} } @misc{RisseBuhlTrefzgerSeifertetal., author = {Risse-Buhl, Ute and Trefzger, N. and Seifert, A.-G. and Sch{\"o}nborn, Wilfried and Gleixner, G. and K{\"u}sel, Kirsten}, title = {Tracking the autochthonous carbon transfer in stream biofilm food webs}, series = {FEMS Microbiology Ecology}, volume = {79}, journal = {FEMS Microbiology Ecology}, number = {1}, issn = {1574-6941}, doi = {10.1111/j.1574-6941.2011.01202.x}, pages = {118 -- 131}, language = {en} } @misc{LazzaroRisseBuhlBrankatschk, author = {Lazzaro, Anna and Risse-Buhl, Ute and Brankatschk, Robert}, title = {Molecular and morphological snapshot characterisation of the protist communities in contrasting alpine glacier forefields}, series = {Acta Protozoologica}, volume = {54}, journal = {Acta Protozoologica}, number = {2}, issn = {0065-1583}, pages = {143 -- 154}, language = {en} } @misc{RisseBuhlSchliefMutz, author = {Risse-Buhl, Ute and Schlief, Jeanette and Mutz, Michael}, title = {Phagotrophic protists are a key component of microbial communities processing leaf litter under contrasting oxic conditions}, series = {Freshwater Biology}, volume = {60}, journal = {Freshwater Biology}, number = {11}, issn = {1365-2427}, doi = {10.1111/fwb.12657}, pages = {2310 -- 2322}, language = {en} } @misc{RisseBuhlMendozaLeraNorfetal., author = {Risse-Buhl, Ute and Mendoza-Lera, Clara and Norf, Helge and Perez, Javier and Pozo, Jesus and Schlief, Jeanette}, title = {Contrasting habitats but comparable microbial decomposition in the benthic and hyporheic zone}, series = {Science of The Total Environment}, volume = {605-606}, journal = {Science of The Total Environment}, issn = {0048-9697}, doi = {10.1016/j.scitotenv.2017.06.203}, pages = {683 -- 691}, language = {en} } @misc{OpreiSchreckingerKholiavkoetal., author = {Oprei, Anna and Schreckinger, Jos{\´e} and Kholiavko, Tatiana and Frossard, Aline and Mutz, Michael and Risse-Buhl, Ute}, title = {Functional and structural recovery of stream biofilms at the ha-bitat scale is based on the individual disturbance history}, series = {35. Jahrestagung der Deutschen Gesellschaft f{\"u}r Limnologie e.V. (DGL) und der Societas Internationalis Limnologiae (SIL) in M{\"u}nster, 23.-27. September 2019, Abstractband}, journal = {35. Jahrestagung der Deutschen Gesellschaft f{\"u}r Limnologie e.V. (DGL) und der Societas Internationalis Limnologiae (SIL) in M{\"u}nster, 23.-27. September 2019, Abstractband}, pages = {72 -- 73}, language = {en} } @misc{WonnerOpreiMutzetal., author = {Wonner, Tamara and Oprei, Anna and Mutz, Michael and Risse-Buhl, Ute}, title = {Is the epipsammic community modulated by trajectory of historic or current sediment shifting?}, series = {35. Jahrestagung der Deutschen Gesellschaft f{\"u}r Limnologie e.V. (DGL) und der Societas Internationalis Limnologiae (SIL) in M{\"u}nster, 23.-27. September 2019, Abstractband}, journal = {35. Jahrestagung der Deutschen Gesellschaft f{\"u}r Limnologie e.V. (DGL) und der Societas Internationalis Limnologiae (SIL) in M{\"u}nster, 23.-27. September 2019, Abstractband}, pages = {167 -- 168}, language = {en} } @misc{WonnerOpreiMutzetal., author = {Wonner, Tamara and Oprei, Anna and Mutz, Michael and Risse-Buhl, Ute}, title = {Is the epipsammic community modulated by trajectory of historic or current sediment shifting?}, series = {Ergebnisse der Jahrestagung 2019 in M{\"u}nster}, journal = {Ergebnisse der Jahrestagung 2019 in M{\"u}nster}, publisher = {Eigenverlag der DGL}, address = {Essen}, isbn = {978-3-9818302-4-8}, pages = {418}, language = {en} } @misc{KryvokhyzhynaMajdiOpreietal., author = {Kryvokhyzhyna, Mariia and Majdi, Nabil and Oprei, Anna and Mutz, Michael and Risse-Buhl, Ute}, title = {Response of meiobenthos to migrating ripples in sandy lowland streams}, series = {Hydrobiologia}, volume = {849}, journal = {Hydrobiologia}, number = {8}, issn = {0018-8158}, doi = {10.1007/s10750-022-04836-6}, pages = {1905 -- 1921}, language = {en} } @misc{RisseBuhlOpreiMutz, author = {Risse-Buhl, Ute and Oprei, Anna and Mutz, Michael}, title = {Streambed migration frequency drives ecology and biogeochemistry across spatial scales}, series = {WIREs Water}, volume = {10}, journal = {WIREs Water}, number = {3}, issn = {2049-1948}, doi = {10.1002/wat2.1632}, language = {en} } @misc{ScheidweilerMendozaLeraMutzetal., author = {Scheidweiler, David and Mendoza-Lera, Clara and Mutz, Michael and Risse-Buhl, Ute}, title = {Overlooked Implication of Sediment Transport at Low Flow: Migrating Ripples Modulate Streambed Phototrophic and Heterotrophic Microbial Activity}, series = {Water Resources Research}, volume = {57}, journal = {Water Resources Research}, number = {3}, issn = {1944-7973}, doi = {10.1029/2020WR027988}, pages = {16}, language = {en} } @misc{SchreckingerMutzFranzmannetal., author = {Schreckinger, Jos{\´e} and Mutz, Michael and Franzmann, Insa and Risse-Buhl, Ute}, title = {Light or mechanics: What drives phototrophic and heterotrophic microbial activity in sandy sediments?}, series = {Deutsche Gesellschaft f{\"u}r Limnologie e.V., Ergebnisse der Jahrestagung in Leipzig 2021}, journal = {Deutsche Gesellschaft f{\"u}r Limnologie e.V., Ergebnisse der Jahrestagung in Leipzig 2021}, publisher = {Eigenverlag der DGL}, address = {Essen}, isbn = {978-3-9818302-6-2}, pages = {206}, language = {en} } @misc{RisseBuhlOpreiMutz, author = {Risse-Buhl, Ute and Oprei, Anna and Mutz, Michael}, title = {Migrating streambeds - ecological and biogeochemical consequences of fine sediment transport}, series = {Deutsche Gesellschaft f{\"u}r Limnologie e.V., Ergebnisse der Jahrestagung in Leipzig 2021}, journal = {Deutsche Gesellschaft f{\"u}r Limnologie e.V., Ergebnisse der Jahrestagung in Leipzig 2021}, publisher = {Eigenverlag der DGL}, address = {Essen}, isbn = {978-3-9818302-6-2}, pages = {192}, language = {en} } @misc{OpreiSchreckingerKholiavkoetal., author = {Oprei, Anna and Schreckinger, Jos{\´e} and Kholiavko, Tatiana and Mutz, Michael and Risse-Buhl, Ute}, title = {Variability of functional stream biofilm recovery at the habitat scale after disturbances from drying and sediment transport}, series = {11th Symposium for European Freshwater Sciences, June 30-July 5, 2019, Zagreb, Croatia, SEFS11 Abstract book}, journal = {11th Symposium for European Freshwater Sciences, June 30-July 5, 2019, Zagreb, Croatia, SEFS11 Abstract book}, pages = {338}, language = {en} } @misc{RisseBuhlHagedornDuemigetal., author = {Risse-Buhl, Ute and Hagedorn, Frank and D{\"u}mig, Alexander and Gessner, Mark O. and Schaaf, Wolfgang and Nii-Annang, Seth and Gerull, Linda and Mutz, Michael}, title = {Dynamics, chemical properties and bioavailability of DOC in an early successional catchment}, series = {Biogeosciences Discussion}, volume = {10}, journal = {Biogeosciences Discussion}, number = {1}, issn = {1810-6285}, pages = {1011 -- 1049}, language = {en} } @inproceedings{RisseBuhlNiiAnnangHagedornetal., author = {Risse-Buhl, Ute and Nii-Annang, Seth and Hagedorn, Frank and Schaaf, Wolfgang and D{\"u}mig, Alexander and Schloter, Michael and Gessner, Mark O. and Mutz, Michael}, title = {Can old organic carbon drive microbial activity in surface waters of a newly created landscape?}, series = {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}, booktitle = {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}, publisher = {BTU}, address = {Cottbus}, pages = {S. 93}, language = {en} } @misc{RisseBuhlHagedornDuemigetal., author = {Risse-Buhl, Ute and Hagedorn, Frank and D{\"u}mig, Alexander and Gessner, Mark O. and Schaaf, Wolfgang and Nii-Annang, Seth and Gerull, Linda and Mutz, Michael}, title = {Dynamics, chemical properties and bioavailability of DOC in an early successional catchment}, series = {Biogeosciences}, volume = {10}, journal = {Biogeosciences}, issn = {1726-4189}, doi = {doi:10.5194/bg-10-4751-2013}, pages = {4751 -- 4765}, language = {en} } @misc{OpreiSchreckingerKholiavkoetal., author = {Oprei, Anna and Schreckinger, Jos{\´e} and Kholiavko, Tatiana and Frossard, Aline and Mutz, Michael and Risse-Buhl, Ute}, title = {Long-term functional recovery and associated microbial community structure after sediment drying and bedform migration}, series = {Frontiers in Ecology and Evolution}, volume = {Vol. 11}, journal = {Frontiers in Ecology and Evolution}, issn = {2296-701X}, doi = {10.3389/fevo.2023.1112519}, abstract = {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.}, language = {en} } @inproceedings{RisseBuhlHagedornDuemigetal., author = {Risse-Buhl, Ute and Hagedorn, Frank and D{\"u}mig, Alexander and Gessner, Mark O. and Schaaf, Wolfgang and Nii-Annang, Seth and Gerull, Linda and Mutz, Michael}, title = {Dynamics, chemical properties and bioavailability of DOC in an early successional catchment}, series = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, booktitle = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, editor = {Jeltsch, Florian and Joshi, Jasmin}, publisher = {Gesellschaft f{\"u}r {\"O}kologie}, address = {Berlin}, pages = {S. 377}, abstract = {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.}, language = {en} }