TY - CHAP A1 - Brunke, Matthias A1 - Mutz, Michael A1 - Marxsen, Jürgen A1 - Schmidt, Christian A1 - Schmidt, Susanne A1 - Fleckenstein, Jan H. ED - Brendelberger, Heinz ED - Martin, Peter ED - Brunke, Matthias ED - Hahn, Hans Jürgen T1 - Das hyporheische Interstitial von Fließgewässern : Strukturen, Prozesse und Funktionen T2 - Grundwassergeprägte Lebensräume : eine Übersicht über Grundwasser, Quellen, das hyporheische Interstitial und weitere grundwassergeprägte Habitate KW - Grundwasser KW - Landschaftswasserhaushalt KW - Habitat Y1 - 2015 SN - 978-3-510-53012-0 SP - 133 EP - 214 PB - Schweizerbart CY - Stuttgart ER - TY - CHAP A1 - Mutz, Michael A1 - Schmidt, Christian A1 - Fleckenstein, Jan H. ED - Brendelberger, Heinz ED - Martin, Peter ED - Brunke, Matthias ED - Hahn, Hans Jürgen T1 - Hydromorphologie des hyporheischen Interstitials T2 - Grundwassergeprägte Lebensräume : eine Übersicht über Grundwasser, Quellen, das hyporheische Interstitial und weitere grundwassergeprägte Habitate KW - hydrologische Prozesse KW - Stoffhaushalt Y1 - 2015 SN - 978-3-510-53012-0 SP - 139 EP - 153 PB - Schweizerbart CY - Stuttgart ER - TY - GEN A1 - Mendoza-Lera, Clara A1 - Federlein, Laura L. A1 - Knie, Matthias A1 - Mutz, Michael T1 - The algal lift: Buoyancy-mediated sediment transport T2 - Water Resources Research KW - algal mat Y1 - 2016 U6 - https://doi.org/10.1002/2015WR017315 SN - 1944-7973 VL - 52 IS - 1 SP - 108 EP - 118 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 - CHAP A1 - Scheidweiler, David A1 - Mendoza-Lera, Clara A1 - Mutz, Michael T1 - Coupling the “smart” tracer resazurin and respiration determination to assess streambed community response to leaf-litter burial T2 - Erweiterte Zusammenfassungen der Jahrestagung der Deutschen Limnologischen Gesellschaft (DGL) in Magdeburg-Stendal 2014 KW - respiration Y1 - 2015 SN - 978-3-9813095-7-7 SP - 243 EP - 248 PB - Eigenverlag der DGL CY - Hardegsen ER - TY - GEN A1 - Altenkirch, Nora A1 - Zlatanović, Sanja A1 - Woodward, K. Benjamin A1 - Trauth, Nico A1 - Mutz, Michael A1 - Molkenthin, Frank T1 - Untangling hyporheic residence time distributions and whole stream" "metabolism using a hydrological process model T2 - Procedia Engineering N2 - The interaction of the water residence time (RT) in hyporheic sediments with the sediment metabolic rates is believed to be a key factor controlling whole stream metabolism. However, due to the methodological difficulties, there is little data that investigates this fundamental theory of aquatic ecology. Here, we report on progress made to combine numerical modelling with a series of modification to laboratory flumes overcoming methodological difficulties e.g. by creating steady flow paths for assessment of metabolic rates. To model the biogeochemical performance and to validate the model results, sediment structures were introduced in both, the model and the flumes, leading to differing RT distributions. Furthermore, the DOC supply in the flumes was manipulated to test the whole stream metabolic response with regard to RT distributions. In the flumes, hydraulic conditions were assessed using conservative tracer and heat as tracer. Metabolic activity was assessed using oxygen dynamics as a proxy of community respiration (CR). Residence time and metabolic processes were modelled using a multicomponent reactive transport code called MIN3P and calibrated with regard to the hydraulic conditions using the results obtained from the flume experiments. Monod type expressions were used to implement metabolic activity terms in the model. Using the results of the hydrological process model, a sensitivity analysis of the impact of RT distributions on the metabolic activity could yield supporting proof of an existing link between the two. KW - residence times KW - metabolism KW - MIN3P Y1 - 2016 UR - http://www.sciencedirect.com/science/article/pii/S1877705816319877 U6 - https://doi.org/10.1016/j.proeng.2016.07.598 SN - 1877-7058 N1 - 12th International Conference on Hydroinformatics, HIC 2016, Incheon, Korea VL - 154 SP - 1071 EP - 1078 ER - TY - CHAP A1 - Altenkirch, Nora A1 - Mutz, Michael A1 - Molkenthin, Frank A1 - Zlatanović, Sanja A1 - Trauth, Nico T1 - Untangling hyporheic residence time distributions and whole stream metabolisms using a hydrological process model T2 - European Geosciences Union, General Assembly 2016, Vienna, Austria N2 - The interaction of the water residence time in hyporheic sediments with the sediment metabolic rates is believed to be a key factor controlling whole stream metabolism. However, due to the methodological difficulties, there is little data that investigates this fundamental theory of aquatic ecology. Here, we report on progress made to combine numerical modeling with a series of manipulation to laboratory flumes overcoming methodological difficulties. In these flumes, hydraulic conditions were assessed using non-reactive tracer and heat pulse sensor. Metabolic activity was measured as the consumption and production of oxygen and the turnover of reactive tracers. Residence time and metabolic processes were modeled using a multicomponent reactive transport code called Min3P and calibrated with regard to the hydraulic conditions using the results obtained from the flume experiments. The metabolic activity was implemented in the model via Monod type expressions e.g. for aerobic respiration rates. A number of sediment structures differing in residence time distributions were introduced in both, the model and the flumes, specifically to model the biogeochemical performance and to validate the model results. furthermore, the DOC supply and surface water flow velocity were altered to test the whole stream metabolic response. Using the results of the hydrological process model, a sensitivity analysis of the impact of residence time distributions on the metabolic activity could yield supporting proof of an existing link between the two. Y1 - 2016 UR - http://meetingorganizer.copernicus.org/EGU2016/EGU2016-14435.pdf N1 - EGU2016-14435 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - GEN A1 - Mendoza-Lera, Clara A1 - Frossard, Aline A1 - Knie, Matthias A1 - Federlein, Laura L. A1 - Gessner, Mark O. A1 - Mutz, Michael T1 - Importance of advective mass transfer and sediment surface area for streambed microbial communities T2 - Freshwater Biology KW - community respiration KW - lowland streams Y1 - 2017 U6 - https://doi.org/10.1111/fwb.12856 SN - 1365-2427 VL - 62 IS - 1 SP - 133 EP - 145 ER - TY - GEN A1 - Fabian, Jenny A1 - Zlatanović, Sanja A1 - Mutz, Michael A1 - Premke, Katrin T1 - Fungal-bacterial dynamics and their contribution to terrigenous carbon turnover in relation to organic matter quality T2 - The ISME Journal KW - organic matter KW - sediments Y1 - 2017 U6 - https://doi.org/10.1038/ismej.2016.131 SN - 1751-7362 VL - 11 IS - 2 SP - 415 EP - 425 ER - TY - GEN A1 - Zlatanović, Sanja A1 - Fabian, Jenny A1 - Mendoza-Lera, Clara A1 - Woodward, K. Benjamin A1 - Premke, Katrin A1 - Mutz, Michael T1 - Periodic sediment shift in migrating ripples influences benthic microbial activity T2 - Water Resources Research KW - migrating ripples KW - disturbance KW - microbial activity Y1 - 2017 U6 - https://doi.org/10.1002/2017WR020656 SN - 1944-7973 VL - 53 IS - 6 SP - 4741 EP - 4755 ER - TY - GEN A1 - Zlatanović, Sanja A1 - Fabian, Jenny A1 - Premke, Katrin A1 - Mutz, Michael T1 - Shading and sediment structure effects on stream metabolism resistance and resilience to infrequent droughts T2 - Science of The Total Environment KW - Sediment heterogeneity KW - Microbes KW - Climate change Y1 - 2017 U6 - https://doi.org/10.1016/j.scitotenv.2017.10.105 SN - 1879-1026 SN - 0048-9697 ER - TY - GEN A1 - Datry, Thibault A1 - Singer, Gabriel A1 - Sauquet, Eric A1 - Mutz, Michael T1 - Science and Management of Intermittent Rivers and Ephemeral Streams (SMIRES) T2 - Research Ideas and Outcomes KW - Flow intermittence KW - river networks Y1 - 2017 U6 - https://doi.org/10.3897/rio.3.e21774 SN - 2367-7163 VL - 3 ER - TY - CHAP A1 - Zlatanović, Sanja A1 - Fabian, Jenny A1 - Premke, Katrin A1 - Mutz, Michael T1 - What drives structural and functional resistance and resilience of sediment microbial community to supra-seasonal drought-shading and sediment structure as controlling factors? T2 - Ergebnisse der Jahrestagung 2017 der Deutschen Gesellschaft für Limnologie (DGL) in Cottbus KW - microbial community Y1 - 2018 UR - https://www.dgl-ev.de/cms/upload/dokumente/Publikationen/DGL_Ergebnisse_der_Jahrestagung_2017_Cottbus_CD.pdf SN - 978-3-9818302-2-4 SP - S. 528 PB - Eigenverlag der DGL CY - Hardegsen ER - TY - CHAP A1 - Oprei, Anna A1 - Zlatanović, Sanja A1 - Mutz, Michael T1 - Grazing and drying intensity modulate drought resistance and recovery of shallow hyporheic respiration T2 - Ergebnisse der Jahrestagung 2017 der Deutschen Gesellschaft für Limnologie (DGL) in Cottbus KW - drought resistance Y1 - 2018 UR - https://www.dgl-ev.de/cms/upload/dokumente/Publikationen/DGL_Ergebnisse_der_Jahrestagung_2017_Cottbus_CD.pdf SN - 978-3-9818302-2-4 SP - S. 355 PB - Eigenverlag der DGL CY - Hardegsen ER - TY - GEN A1 - Fabian, Jenny A1 - Zlatanović, Sanja A1 - Mutz, Michael T1 - Environmental Control on Microbial Turnover of Leaf Carbon in Streams – Ecological Function of Phototrophic-Heterotrophic Interactions T2 - Frontiers in microbiology KW - algae KW - bacteria KW - microbial interactions Y1 - 2018 U6 - https://doi.org/10.3389/fmicb.2018.01044 SN - 1664-302X VL - Volume 9 ER - TY - GEN A1 - Arce, María Isabel A1 - Mendoza-Lera, Clara A1 - Almagro, Maria A1 - Mutz, Michael T1 - A conceptual framework for understanding the biogeochemistry of dry riverbeds through the lens of soil science T2 - Earth-Science Reviews KW - Cross-ecosystem research KW - Drought KW - Sediments Y1 - 2018 U6 - https://doi.org/10.1016/j.earscirev.2018.12.001 SN - 0012-8252 VL - 188 SP - 441 EP - 453 ER - TY - CHAP A1 - Elosegi, Arturo A1 - Feld, Christian K. A1 - Mutz, Michael A1 - Schiller, Daniel von ED - Sabater, Sergi ED - Elosegi, Arturo ED - Ludwig, Ralf T1 - Multiple Stressors and Hydromorphological Degradation T2 - Multiple Stressors in River Ecosystems KW - multiple stressors KW - River ecosystems Y1 - 2019 SN - 978-0-12-811800-9 SN - 978-0-12-811713-2 SP - 65 EP - 79 PB - Elsevier CY - Amsterdam ER - TY - GEN A1 - Oprei, Anna A1 - Zlatanović, Sanja A1 - Mutz, Michael T1 - Grazers superimpose humidity effect on stream biofilm resistance and resilience to dry-rewet stress T2 - Science of The Total Environment KW - Climate change KW - Flow intermittency Y1 - 2019 U6 - https://doi.org/10.1016/j.scitotenv.2018.12.316 SN - 0048-9697 VL - 659 SP - 841 EP - 850 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 - 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 - Schreckinger, José A1 - Mutz, Michael A1 - Mendoza-Lera, Clara T1 - Same metabolic resilience, different onset –metabolic implications of a rare drying in temperate river sediment T2 - 11th Symposium for European Freshwater Sciences, June 30–July 5, 2019, Zagreb, Croatia, SEFS11 Abstract book KW - perennial rivers Y1 - 2019 UR - http://www.sefs11.biol.pmf.hr/wp-content/uploads/2019/07/Book-of-abstract.pdf SP - 271 ER - TY - GEN A1 - Weigelhofer, Gabriele A1 - Schiller, Daniel von A1 - Mutz, Michael T1 - Effects of drought on the self-purification capacity of temperate headwater streams T2 - 11th Symposium for European Freshwater Sciences, June 30–July 5, 2019, Zagreb, Croatia, SEFS11 Abstract book KW - perennial rivers Y1 - 2019 UR - http://www.sefs11.biol.pmf.hr/wp-content/uploads/2019/07/Book-of-abstract.pdf SP - 273 ER - TY - GEN A1 - Oprei, Anna A1 - Zlatanović, Sanja A1 - Mutz, Michael T1 - When temperate streams fall dry: Humidity and trophic interactions control biofilm resilience T2 - Ergebnisse der Jahrestagung 2019 in Münster KW - Climate change KW - Flow intermittency Y1 - 2020 SN - 978-3-9818302-4-8 SP - 20 EP - 31 PB - Eigenverlag der DGL CY - Essen 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 - 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 - Mendoza-Lera, Clara A1 - Frossard, Aline T1 - Attributes of Drying Define the Structure and Functioning of Microbial Communities in Temperate Riverbed Sediment T2 - Frontiers in Microbiology KW - bacteria KW - community respiration Y1 - 2021 UR - https://www.frontiersin.org/articles/10.3389/fmicb.2021.676615/full U6 - https://doi.org/10.3389/fmicb.2021.676615 SN - 1664-302X VL - 12 ER - TY - GEN A1 - Schreckinger, José A1 - Mutz, Michael A1 - Mendoza-Lera, Clara T1 - When water returns: Drying history shapes respiration and nutrients release of intermittent river sediment T2 - Science of The Total Environment KW - Ammonium KW - DOC Y1 - 2022 U6 - https://doi.org/10.1016/j.scitotenv.2022.155950 SN - 1879-1026 VL - 838 IS - 1 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 - 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 - 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 - 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 - 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 - 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 - Schreckinger, José A1 - Mutz, Michael A1 - Kamjunke, Norbert A1 - Worrich, Anja A1 - Risse-Buhl, Ute T1 - Migrating ripples create streambed heterogeneity altering microbial diversity and metabolic activity T2 - Limnology and Oceanography KW - Sandy sediments KW - lowland streams Y1 - 2024 UR - https://aslopubs.onlinelibrary.wiley.com/journal/19395590 U6 - https://doi.org/10.1002/lno.12631 SN - 1939-5590 SN - 0024-3590 VL - 69 IS - 8 SP - 1882 EP - 1899 ER - TY - GEN A1 - Schreckinger, José A1 - Mutz, Michael A1 - Gessner, Mark O. A1 - Gerull, Linda A1 - Frossard, Aline T1 - Fundamental shifts in soil and sediment microbial communities and functions during 10 year of early catchment succession T2 - Soil Biology and Biochemistry KW - Microbial community structure KW - Bacteria Y1 - 2025 U6 - https://doi.org/10.1016/j.soilbio.2025.109713 SN - 0038-0717 VL - 203 SP - 1 EP - 11 PB - Elsevier BV CY - Amsterdam 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 - 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 - 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 - GEN A1 - Oprei, Anna A1 - Schreckinger, José A1 - Kholiavko, Tatiana A1 - Frossard, Aline A1 - Mutz, Michael T1 - Functional and structural recovery of stream biofilms at the habitat scale is based on the individual disturbance history T2 - Ergebnisse der Jahrestagung 2019 in Münster KW - metabolic activity 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 - 216 PB - Eigenverlag der DGL CY - Essen 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 -