Oxygen dynamics in large reservoirs: A new framework for understanding the formation of metalimnetic oxygen minima
Final Report Abstract
Dissolved oxygen (DO) is a key parameter for the quality management of lakes and reservoirs. For instance, too low concentrations can limit ecological and drinking water quality. The project planned to unite scientist from leading Chinese and German institutes of water research in order to investigate and to better understand DO in standing waters in time and space. The focus of the Applied Geology group from Erlangen and the Lake Research Department at UFZ was placed on the investigation of hydrochemical profiles of mostly the Rappbode Reservoir, the largest drinking water reservoir in Germany. This implied collection of samples from depth profiles at fortnightly frequency over a period of 18 months. Coupled to concentration measurements of DO and carbon phases (DIC, DOC and POC), particular focus was placed onto investigations of their stable isotope ratios. Both, carbon and oxygen isotope patterns together with concentration trends led to novel findings of turnover of important ecological parameters with quantification of source and sink terms. The depth profiles showed particularly interesting dynamics of DO and its turnover patterns in the Metalimnion. This zone showed the lowest DO concentrations and the most pronounced oxygen and carbon dynamics. This broad limnological monitoring enables also a detailed modelling of biogeochemical processing by coupled physical-ecological lake models, which have been used not only for synthesis, but also for climate projections and climate adaptation strategies. Planned parallel investigations of the Chinese Panjiakou Reservoir could only be carried out to a minor extent due to the Corona Pandemic.
Publications
-
Oxygen dynamics in a German Drinking water Reservoir. Seminar at WHR Bejing, China (20.09.2019) and Nankai University Tianjing, China (24.09.2019)
Seewald, M.; Dordoni, M.; Boehrer, B.; Barth, J.A.C. & Rinke, K.
-
Stable isotopes in Hydrology and Limnology. Internal seminar for students of Applied Hydrology at FAU. Internal seminar for students of Water Resources Monitoring at China Institute of Water Resources and Hydropower Research (China) and Nankai University (China). As guest scientist, 2019.
Dordoni, M.
-
10 Jahre metalimnisches Sauerstoffminimum in Deutschlands größterm Trinkwassertalsperrereservoir, DGL Taugng 2020.
Seewald, M.; Mi, Chenxi & Rinke, K.
-
Planktothrix rubescens in der Rappbodetalsperre. ATT AK Biologie, 11.11.2020
Seewald, M. & Rinke, K.
-
Predictive limnology: Using lake models for projecting climate change effects in reservoirs and identifying potential adaptation strategies. Czech Academy of Sciences 2020
Rinke K.
-
Stable isotopes Patterns of Rappbode Reservoir (Germany) and Panjakou Reservoir (China). Internal seminar for students of Applied Hydrology at FAU, 2020
Dordoni, M.
-
Dissolved oxygen stable isotopes in groundwater: a new tracer of biogeochemical reactivity for the underground Critical Zone. Goldschmidt2021 Abstracts.
Osorio-Leon, Ivan-David; Chatton, Eliot; Dordoni, Marlene; Piatka, David; Le Borgne, Tanguy & Bouchez, Camille
-
Oxygen dynamics in the metalimnion. vEGU 19-30.04.2021
Seewald, M.; Dordoni, M.; Barth, J.A.C. & Rinke, K.
-
Stable isotopes of oxygen to characterize a Metalimnetic Oxygen Minimum: insights from a 48 hours field campaign at Rappbode Reservoir, Germany. EGU2021, 2021
Dordoni, M.; Rinke, K.; Seewald, M.; Schmidmeier, J. & Barth, J.A.C.
-
Stratification dynamics in lentic water bodies. Internal seminar for students of Applied Hydrology. Internal seminar for students of Applied Hydrology at FAU, 2021
Dordoni, M.
-
Controlling metalimnetic blooms of Planktothrix rubescens with a novel water withdrawal strategy: a modelling study. SIL congress (10.08.2022)
Mi, C.; Seewald, M. & Rinke, K.
-
Effects of flow reduction and biodiversity decline on periphyton characteristics and carbon cycling. SIL2022, 2022
Tromboni F.; Játiva-Guzmán N.C.; Maasri A.; Bernal S.; Mohr S.; Frank A.H.; Barth, J.A.C.; Dordoni, M.; Jähnig S.; Chandra S.; Seitz C. & Grossart H.P.
-
Flow reduction and biodiversity decline affect periphyton structural and functional characteristics. German Limnology Meeting, 2022.
Tromboni F.; Játiva-Guzmán N.C.; Maasri A.; Bernal S.; Mohr S.; Jähnig S.C.; Frank A.H.; Barth, J.A.C.; Dordoni, M.; Chandra S.; Seitz C. & Grossart H.P.
-
New management strategies that make reservoirs more resilient against climate change. SIL Congress 2022
Rinke K.; Shatwell T.; Nkwalale L. & Mi C.
-
Oxygen sources and sinks in temperate reservoirs: a case study of Rappbode Reservoir, Germany. Internal seminar at WasserCluster Lunz (AT). As guest scientist, independently funded by STSM Grant, 2022
Dordoni, M.; Seewald, M.; Rinke, K.; Schmidmeier, J. & Barth, J.A.C.
-
Stable isotopes (δ18O, δ13C) assess biogeochemical cycles in temperate lentic water bodies. Internal seminar within “Biogeochemistry Seminar Series” at Stockholm University. As guest scientist, 2022
Dordoni, M.; Seewald, M.; Rinke, K.; Schmidmeier, J. & Barth, J.A.C.
-
Stable isotopes in lentic water bodies. Internal seminar for students of Applied Hydrology at FAU, 2022
Dordoni, M.
-
Stable isotopes quantify organic matter turnover into dissolved inorganic carbon in a drinking water reservoir: a case study of Rappbode Reservoir, Germany. JESIUM2022, 2022
Dordoni, M.; Seewald, M.; Rinke, K.; Schmidmeier, J. & Barth, J.A.C.
-
The formation of a metalimnetic oxygen minimum exemplifies how ecosystem dynamics shape biogeochemical processes: A modelling study. Europe-China Eco-Environmental Forum for Young Scholars ——Special topic on water environment (10.12.2022)
Mi, C.; Seewald, M. & Rinke, K.
-
The role of the atmosphere as an oxygen source in a temperate reservoir: a case study of Rappbode Reservoir, Germany. SIL2022, 2022
Dordoni, M.; Seewald, M.; Rinke, K.; Schmidmeier, J. & Barth, J.A.C.
-
Depth distribution of dissolved oxygen stable isotopes constrain temperature-related diel metabolic balances in Germany´s largest drinking water reservoir: The Rappbode System. DGL2023, 2023
Dordoni, M.; Seewald, M.; Rinke, K.; Schmidmeier, J. & Barth, J.A.C.
-
Drivers of carbon and oxygen sources and sinks in standing water bodies. A case study of the Rappbode Reservoir, Harz Mountains, Germany
Dordoni, Marlene
-
Germany’s largest drinking water reservoir in the 21st century: Full assessment of physical and biogeochemical dynamics under ensemble climate projections including ways towards adaption. GLEON 2023 Virtual All Hands’ Meeting (13.02.2023)
Seewald, M. & Rinke, K.
-
Source and Sink Terms of DO via Stable Isotopes in Lentic Water Bodies: An Example from the Rappbode Reservoir. IAEA International Symposium on Isotope Hydrology, 2023
Dordoni, M.; Schmidmeier, J.; Barth, J.A.C.; van Geldern, R.; Seewald, M. & Rinke, K.
