Curriculum vitae

Stipendien

Arbeitserfahrungen

02/2009 – 02/2013	Wiss. Mitarbeiter und Assistent am Lehrstuhl für Hydrologie
08/2008 – 01/2009	Wiss. Mitarbeiter im BayCEER Labor für Isotopenbiogeochemie (Prof. Dr. G. Gebauer)
03/2005 - 0703/2005 - 07/2008	Wiss. Mitarbeiter am Lehrstuhl für Hydrologie, Universität Bayreuth, im DFG Forschungsprojekt BL563/7-2 der DFG Forschergruppe FOR 562 (Bodenprozesse bei extremen meteorologischen Randbedingungen)

Forschungsinteressen

•     Biogeochemie von Mooren, Seesedimenten und anaeroben Aquiferen
•     Biogeochemische Prozesse bei der Renaturierung von Mooren
•     Kopplung hydrologischer und biogeochemischer Prozesse
•     CO₂, N₂O und CH₄ Bildung und Spurengasflüsse
•     Schnittstelle Pflanze - Rhizosphäre - Boden in Feuchtgebieten und
      heterogene Prozessmuster
•     Charakterisierung natürlicher organischer Substanz
•     Redoxaktive organische Substanz und Interaktion von DOC - Eisen -
      Schwefel
•     Stabile und radioaktive Isotope

Forschungsprojekte

Mitgliedschaften, Ämter, Tätigkeiten

• American Geophysical Union (AGU)
• Geochemical Society (GS)
• Deutsche Gesellschaft für Limnologie (DGL)
• Deusche Gesellschaft für Moor und Torfkunde (DGMT)

Tätigkeit als Editorial Board Member

• Scientific Reports
• Biogeochemistry

Weitere Qualifikationen und Tätigkeiten

• Im wissenschaftlichen Organisationsteam der 26.Jahrestagung der Deutschen Gesellschaft für Limnologie 2010 in Bayreuth; Sessionleitung: Biogeochemie von Mooren; Tagebaurestseen; Browning the waters (DOC in Oberflächengewässern)

• Reviewtätigkeit für internationale Fachzeitschriften (Applied Geochemistry, Acta Hydrochimica et Hydrobiologica, Biogeochemistry, Biogeosciences, Contamiant Hydrology, Environmental Science & Technology, Hydrobiologia, Geochimica et Cosmochimica Acta)

Links

• Academia.edu
• DGL AK Moore
• Universität Bayreuth

Publikationen

Original Papers in peer reviewed international Journals

2020

• 60) Hoemberg, A.; Obst, M.; Knorr, K.-H.; Kalbitz, K.; Schaller, J. (2020): Increased silicon concentration in fen peat leads to a release of iron and phosphate and changes in the composition of dissolved organic matter. Geoderma 374, 114422, doi: 10.1016/j.geoderma.2020.114422
• 59) Drollinger,S.; Knorr,K.-H.; Knierzinger,W.; Glatzel,S.: Peat decomposition proxies of Alpine bogs along a degradation gradient. doi: 10.1016/j.geoderma.2020.114331
• 58) Heffernan, L.; Estop‐Aragonés, C.; Knorr, K.-H.; Talbot, J.; Olefeldt, D. (2020): Long‐term impacts of permafrost thaw on carbon storage in peatlands: deep losses offset by surficial accumulation. Journal of Geophysical Research - Biogeosciences (in press)

2019

• 57) Bonaiuti, S.; Blodau, C.; Knorr, K.-H. (2019): Evaluating biogeochemical indicators of methanogenic conditions and thermodynamic constraints in peat. Applied Geochemistry (in press)
• 56) Diaconu, A.-C.; Ioan Tanţău, I; Knorr. K.-H.; Borken, W.; Feurdean, A.; Panait, A.; Gałka, M. (2019): A multi-proxy analysis of hydroclimate trends in an ombrotrophic bog over the last millenium in the Eastern Carpathians of Romania. Palaeogeography, Palaeoclimatology, Palaeoecology (accepted)
• 55) Schaller, J.; Heimes, R.; Ma, J.F.; Meunier, J.-D.; Shao, J.F.; Kashino, M.F.; Knorr, K.-H. (2019): Siilicon accumulation in rice plant aboveground biomass affets leaf carbon quality. Plant and Soil (accepted)
• 54) Berger, S.; Braeckevelt, E.; Blodau, C.; Burger, M.; Goebel, M.; Klemm, O.; Knorr, K.-H.; Wagner-Riddle, C. (2019): A 1-year greenhouse gas budget of a peatland exposed to long-term nutrient infiltration and altered hydrology: high carbon uptake and methane emission. Environmental Monitoring and Assessment 191, 533. doi: 10.1007/s10661-019-7639-1
• 53) Selle, B.; Knorr, K.-H.; Lischeid, G. (2019): Mobilisation and transport of dissolved organic carbon and iron in peat catchments—Insights from the Lehstenbach stream in Germany using generalised additive models. Hydrological Processes (early view), doi: 10.1002/hyp.13552
• 52) Mathijssen, P.J.H.; Galka, M.; Borken, W.; Knorr, K.-H. (2019): Plant communities control long term carbon accumulation and biogeochemical gradients in a Patagonian bog. Science of the Total Environment 684, 670-681, doi: 10.1016/j.scitotenv.2019.05.310
• 51) Moore, T.R.; Knorr, K.-H.; Thompson, L.; Roy, C.; Bubier, J.L. (2019): The effect of long-term fertilization on peat in an ombrotrophic bog. Geoderma 343, 176-186, doi.org/10.1016/j.geoderma.2019.02.034
• 50) Münchberger, W.; Knorr, K.-H.; Blodau, C.; Pancotto, V.A.; Kleinebecker, T. (2019): Zero to moderate methane emissions in a densely rooted, pristine Patagonian bog - biogeochemical controls as revealed from isotopic evidence. Biogeosciences (accepted)
• 49) Gao, C,; Sander, M.; Agethen, S.; Knorr, K.-H. (2019): Electron accepting capacity of dissolved and particulate organic matter control CO2 and CH4 formation in peat soils. Geochimica et Cosmochimica Acta 245: 266-277
• 48) Galka, M.; Szal, M.; Broder, T.; Loisel, J.; Knorr, K.-H. (2019): Peatbog resilience to pollution and climate change over the past 2700 years in the Harz Mountains, Germany. Ecological Indicators, 97, 183-193, doi: 10.1016./j.ecolind.2018.10.015

2018

• 47) Yan, R.; Kappler, A.; Muehe, E.M.; Knorr, K.-H.; Horn, M.A.; Poser, A.; Lohmayer, R.; Peiffer, S. (2018): Effect of reduced sulfur species on chemolithoautotrophic pyrite oxidation with nitrate. Geomicrobiology Journal, doi: 10.1080/01490451.2018.1489915
• 46) Wen, X.; Unger, V.; Jurasinski, G.; Koebsch, F.; Horn, F.; Rehder, G.; Sachs, T.; Zak, D.; Lischeid, G.; Knorr, K.-H.; Böttcher, M.E.; Winkel, M.; Bodelier, P.L.E.; Liebner, S. (2018): Predominance of methanogens over methanotrophs in rewetted fens characterized by high methane emissions. Biogeosciences 15, 6519-6536.
• 45) Agethen, S.; Sander, M.; Waldemer, C.; Knorr, K.-H. (2018): Plant rhizosphere oxidation reduces methane production and emission in rewetted peatlands. Soil Biology & Biochemistry, 125, 125-135.
• 44) Berger, S.; Praetzel, L.S.E.; Goebel, M.; Blodau, C.; Knorr, K.-H. (2018): Differential response of carbon cycling to long-term nutrient input and altered hydrological conditions in a continental Canadian peatland. Biogeosciences, 15, 885-903, doi: 10.5194/bg-15-885-2018
• 43) Xia, B.; Qiu, H.; Knorr, K.-H.; Blodau, C.; Qiu, R. (2018): Occurrence and fate of colloids and colloid-associated metals in a mining-impacted agricultural soil upon prolonged flooding. Journal of Hazardous Materials, 348, 56-66
• 42) Agethen, S.; Knorr, K.-H. (2018): Juncus effusus mono-stands in restored cutover peat bogs - Analysis of litter quality, controls of anaerobic decomposition, and the risk of secondary carbon loss. Soil Biology & Biochemistry, 117, 139-152
  

2017

• 41) Berger, S.; Gebauer, G.; Knorr, K.-H. (2017): Peatlands in an eutrophic world - assessing the state of a poor fen - bog transition in southern Ontario, Canada, after long term nutrient input and altered hydrological conditions. Soil Biology & Biochemistry, 114, 131-144
  
• 40) Reithmaier, G.-M.S.; Knorr, K.-H.; Arnhold, S.; Planer-Friedrich, B.; Schaller, J. (2017): Enhanced silicon availability leads to increased methane production, nutrient and toxicant mobility in peatlands. Scientific Reports, 7, 8728
  
• 39) Blodau, C.; Agethen, S.; Broder, T.; Knorr, K.-H. (2017): Gradients of organic matter quality, mineralization and sequestration in Cook's Bay of Lake Simcoe, Canada. Limnologica, in press, doi: 10.1016/j.limno.2017.04.005
• 38) Musolff, A.; Selle, B.; Büttner, O.; Opitz, M.; Knorr, K.-H.; Fleckenstein, J.H.; Reemtsma, T.; Tittel, J. (2017): Response to the Editor: Does iron reduction control the release of dissolved organic carbon and phosphate at catchment scales? - Need for a joint research effort. Global Change Biology, 23, e5-e6, doi: 10.1111/gcb.13758
• 37) Broder, T.; Knorr, K.-H.; Biester, H. (2017): Changes in dissolved organic matter quality in a peatland and forest headwater stream as a function of seasonality and hydrolic conditions. Hydrology and Earth System Sciences, 21, 2035-2051, doi: 10.5194/hess-21-2035-2017
• 36) Bonaiuti, S.; Blodau, C.; Knorr, K.-H. (2017): Transport, anoxia and end-product accumulation control carbon dioxide and methane production and release in peat soils. Biogeochemistry, 133(2), 219-239, doi: 10.1007/s10533-017-0328-7

2016

• 35) Borken, W.; Horn, M.A.; Geimer, St.; Bahamonde-Aguilar, N.A.; Knorr, K.-H. (2016): Associative nitrogen fixation in nodules of the conifer Lepidothamnus fonkii (Podocarpaceae) inhabiting ombrotrophic bogs in southern Patagonia. Scientific Reports, 6, 39072, doi: 10.1038/srep39072
• 34) Kim, K.; Kim, B; Knorr, K.-H.; Eum, J.; Choi, Y.; Jung, S.; Peiffer, S. (2016): Potential effects of sediment processes on water quality of an artificial reservoir in the Asian Monsoon region. Inland Waters 6(3), 423-435; doi: 10.5268/IW-6.3.852
• 33) Wertebach, T.; Knorr, K.-H.; Lordiek, M.; Tretiakov, N.; Blodau, C.; Hölzel, N.; Kleinebecker, T. (2016): Relationships between vegetation succession, pore water chemistry and CH₄ and CO₂ production in a transitional mire of Western Siberia (Tyumen Oblast). Wetlands. (Online first) doi:10.1007/s13157-016-0798-8
• 32) Gao, C.; Knorr, K.-H., Yu. Z.; He. J.; Zhang, S.; Lu, X., Wang, G. (2016): Black carbon deposition and storage in peat soils of the Changbai Mountain, China. Geoderma 273, 98-105. doi: 10.1016/j.geoderma.2016.03.021
• 31) Hausmann, B.; Knorr, K.-H.; Schreck, K.; Tringe, S.G.; Del Rio, T.G., Loy, A.; Pester, M. (2016): Consortia of low-abundance bacteria drive sulfate reduction-dependent degradation of fermentation products in peat soil microcosms. The ISME Journal. doi:10.1038/ismej.2016.42
• 30) Wei, S.H.; Bai, J.Y.; Yang, C.J.; Zhang, Q.R.; Knorr, K.-H.; Zhan, J.; Gao, Q.H. (2016): Compound amino acids added in media improved Solanum nigrum L. phytoremediating CD-PAHS contaminated soil. International Journal of Phytoremediation 18 (4), 358-363
• 29) Yu, Zhiguo; Göttlicher, Jörg; Steininger, Ralph; Knorr, Klaus-Holger (2016): Organic sulfur and organic matter redox processes contribute to electron flow in anoxic incubations of peat. Environmental Chemistry (Online first) doi: 10.1071/EN15091
• 28) Xia, B.; Guo, P.; Lei, Y.; Zhang, T.; Qiu, R.; Knorr, K.-H. (2016): Investigating speciation and toxicity of heavy metals in anoxic marine sediments—a case study from a mariculture bay in Southern China Journal of Soils and Sediments 16 (2), 665-676. Springer Berlin Heidelberg. doi:10.1007/s11368-015-1267-3

2015

• 27) Knorr, K.H.; Horn, M.A.; Borken, W.  (2015): Significant non-symbiotic nitrogen fixation in Patagonian ombrotrophic bogs. Global Change Biology 21(6), 2357-2365; doi: 10.1111/gcb.12849
• 26) Yu, Zhiguo; Peiffer, Stefan; Göttlicher, Jörg ,  Knorr, K.-H. (2015): Electron transfer budgets and kinetics of abiotic oxidation and incorporation of aqueous sulfide by dissolved organic matter. Environ. Sci. Technol. 49(9), 5441-5449; doi:10.1021/es505531u
• 25) Yu, Z.-G.; Orsetti, S.; Haderlein, S. B.; Knorr, K.-H. (2015): Electron Transfer Between Sulfide and Humic Acid: Electrochemical Evaluation of the Reactivity of Sigma-Aldrich Humic Acid Toward Sulfide. Aquatic Geochemistry 22(2), 117-130;  Link

2014

• 24) Broder T.; Blodau C.; Biester H., Knorr K.H (2014): Sea spray, trace elements, and decomposition patterns as possible constraints on the evolution of CH₄ and CO₂ concentrations and isotopic signatures in oceanic ombrotrophic bogs. Biogeochemistry 122(2-3), 327-342, doi: 10.1007/s10533-014-0044-5
• 23) Biester, H.; Knorr, K.-H.; Schellekens, J.; Basler, A.; Hermanns, Y.-M. (2014): Comparison of different methods to determine the degree of peat decomposition in peat bogs. Biogeosciences, 11, 2691–2707. doi:10.5194/bg-11-2691-2014

2013

• 22) Neubauer, E., v.d. Kammer, F., Knorr, KH., Peiffer, S., Reichert, M., Hofmann, T: Colloid-associated export of arsenic in stream water during stormflow events, Chemical Geology, 352, 81-91 (2013) DOI: 10.1016/j.chemgeo.2013.05.017
• 21) Estop-Aragonés, C; Knorr, KH, Blodau, C: Belowground in situ redox dynamics and methanogenesis recovery in a degraded fen during dry-wet cycles and flooding, Biogeosciences, 10, 421-436 (2013)
• 20) Knorr, KH: DOC-dynamics in a small headwater catchment as driven by redox fluctuations and hydrological flow paths - are DOC exports mediated by iron reduction/oxidation cycles?, Biogeosciences, 10, 891-904 (2013), DOI: 10.5194/bg-10-891-2013
• 19) Strohmeier, S; Knorr, KH; Reichert, M; Frei, S; Fleckenstein, JH; Peiffer, S; Matzner, E: Concentrations and fluxes of dissolved organic carbon in runoff from a forested catchment: Insights from high frequency measurements, Biogeosciences(10), 905-916 (2013), DOI: 10.5194/bg-10-905-2013

2012

• 18) Pester, M; Knorr, KH; Friedrich, M W; Wagner, M; Loy, A: Sulfate-reducing microorganisms in wetlands – fameless actors in carbon cycling and climate change, Frontiers in Terrestrial Microbiology, 3(72) (2012), DOI: 10.3389/fmicb.2012.00072
• 17) Broder, T; Blodau, C; Biester, H; Knorr, KH: Peat decomposition records in three pristine ombrotrophic bogs in southern Patagonia, Biogeosciences, 9, 1479-1491 (2012), DOI: 10.5194/bg-9-1479-2012
• 16) Estop-Aragonés, C; Knorr, KH; Blodau, C: Controls on in situ oxygen and dissolved inorganic carbon dynamics in peats of a temperate fen, Journal of Geophysical Research, Biogeosciences, 117, G02002 (2012), DOI: 10.1029/2011JG001888
• 15) Frei, S; Knorr, KH; Peiffer, S; Fleckenstein, J: Surface micro-topography causes hot spots of biogeochemical activity in wetland systems - a virtual modeling experiment., Journal of Geophysical Research - Biogeosciences, 117(G00N12), 1 - 18 (2012), DOI: 10.1029/2012JG002012

bis 2011

• 14) Dorodnikov, M; Knorr, KH; Kuzyakov, Y; Wilmking, M: Contribution of recent plant photosynthates of Eriophorum vaginatum and Scheuchzeria palustris to methanogenesis and CH4 transport at a boreal mire: a 14C pulse-labeling study, Biogeosciences, 8, 2365-2375 (2011), DOI: 10.5194/bg-8-2365-2011
• 13) Deppe, M; McKnight, D; Knorr, KH; Blodau, C: Effects of short-term drying and irrigation on CO2 and CH4 production and emission from mesocosms of a northern bog and alpine fen, Biogeochemistry, 100(1-3), 89-103 (2010)
• 12) Goldberg, S; Knorr, KH; Blodau, C; Lischeid, G; Gebauer, G: Impact of altering the water table height of an acidic fen on N2O and NO fluxes and soil concentrations, Global Change Biology, 16, 220-233 (2010), DOI: 10.1111/j.1365-2486.2009.02015
• 11) Knorr, KH; Blodau, C: Impact of experimental drought and rewetting on redox transformations and methanogenesis in mesocosms of a northern fen soil, Soil Biology & Biochemistry, 41(6), 1187-1198 (2009), DOI: 10.1016/j.soilbio.2009.02.030
• 10) Knorr, KH; Lischeid, G; Blodau, C: Dynamics of redox processes in a minerotrophic fen exposed to a water table manipulation, Geoderma, 153, 379-392 (2009), DOI: 10.1016/j.geoderma.2009.08.023
  
• 9) Blodau, C; Fulda, B; Bauer, M; Knorr, KH: Arsenic speciation and turnover in intact organic soil mesocosms during experimental drought and rewetting, Geochim. Cosmochim. Acta, 72, 3991-4007 (2008)
• 8) Blodau, C; Rees, R; Flessa, H; Rodionov, A; Guggenberger, G; Knorr, KH; Shibistova, O; Zrazhevskaya, G; Mikheeva, N; Kasansky, O: A snapshot of CO2 and CH4 evolution in a thermokarst pond near Igarka, northern Siberia, J. Geophys. Research (2008)
• 7) Glaser, B; Knorr, KH: Isotopic evidence for condensed aromatics from non-pyrogenic sources in soils - implications for current methods for quantifying soil black carbon, Rapid Communications in Mass Spectrometry, 22, 935-942 (2008)
• 6) Goldberg, S; Knorr, KH; Gebauer, G: N2O concentration and isotope signature along profiles provide deeper insight into the fate of N2O in soils, Isotopes Environm. Health Studies, 44, 377-391 (2008), DOI: 10.1080/10256010802507433
• 5) Knorr, KH; Glaser, B; Blodau, C: Fluxes and 13C isotopic composition of dissolved carbon and pathways of methanogenesis in a fen soil exposed to experimental drought, Biogeosciences, 5, 1457-1473 (2008)
• 4) Knorr, KH; Oosterwoud, MR; Blodau, C: Experimental drought alters rates of soil respiration and methanogenesis but not carbon exchange in soil of a temperate fen, Soil Biology & Biochemistry, 40(7), 1781-1791 (2008)
• 3) Knorr, KH; Blodau, C: Controls on schwertmannite transformation rates and products, Applied Geochemistry, 22, 2006-2015 (2007)
• 2) Blodau, C; Knorr, KH: Experimental inflow of groundwater induces a 'biogeochemical regime shift' in iron rich and acidic sediments, J. Geophys. Research, 111, G02026 (2006)
• 1) Knorr, KH; Blodau, C: Altered groundwater inflow remobilizes acidity from sediments of an iron rich and acidic lake, Environmental Science and Technology, 40, 2944-2950 (2006)

Proceedings and book chapters

• Fleckenstein, JH; Frei, S; Knorr, KH: Modelling interactions between hydrologic dynamics and biogeochemical processes in a riparian wetland of a low-order stream, IAHS Red Book(345), 89-92 (2011)
• Peiffer, S; Knorr, KH; Blodau, C: 3.2.1.2 The Role of Iron Minerals for the Biogeochemistry of Acid Pit Lakes, , Acid Pit Lakes (Ed. Geller W.) (2011)
• Knorr, KH: Auswirkung verstärkter Austrocknungs- und Wiederbefeuchtungsereignisse auf Respirationsprozesse in einem Niedermoor, Telma, 40, 67-88 (2010)