Marcelo Ketzer

Professor

Institutionen för biologi och miljö Fakulteten för hälso- och livsvetenskap

marcelo.ketzer@lnu.se

0480-44 62 55

Jag är professor i miljövetenskap med fokus på sedimentgeokemi vid institutionen för biologi och miljö. Mina nuvarande forskningsintressen är den kemiska sammansättningen hos sediment och jordmån (och relaterade porvatten och gaser) i deras ursprungliga form samt när de har påverkats av mänsklig aktivitet. Jag är också intresserad av förhållandet mellan liv och kemisk sammansättning i geologiska miljöer.

Undervisning

Jag är involverad i undervisning inom geovetenskap, klimatfrågan och miljövetenskap på miljöanalytikerprogrammet (grundnivå) och på miljövetenskap och hållbar utvecklingsprogrammet (avancerad nivå). Båda programmen har sin hemvist vid fakulteten för hälso- och livsvetenskap.

Forskning

Jag deltar i flera forskningsprojekt med fokus på hur naturliga system svarar på klimatförändringar. Vi undersöker till exempel hur klimatförändringar kan påverka biogeokemiska cykler i sediment (e.g., metan) i Östersjön och, därmed, hur miljömässiga förutsättningar kan komma att påverkas i framtiden. Att förstå naturliga system och hur dessa påverkas av klimatförändringar kommer att vara en viktig del för att kunna planera för mildrande åtgärder i ett scenario med global uppvärmning. En annan viktig konsekvens av klimatförändringar på den marina miljön är stabiliteten hos stora reservoarer av metan som finns bundet som gashydrater djupt i haven. Stabiliteten hos sådana system är känslig för glaciala-/interglaciala förändringar i vattentrycket (havsnivån) och temperaturen, men även för den dåligt kända dynamiken hos de lufthål som noterats släppa ut gas i haven. En djupare förståelse om utsläpp av gas över tid är av stor vetenskaplig och samhällelig relevans på grund av den påverkan dessa utsläpp har på globala kolbudgetar, det marina livet, stabiliteten hos sluttande havsbottnar och uppskattningar av resurser. Jag deltar i forskningsprojekt i Atlanten, Östersjön och Medelhavet.

Nyheter

Lyssna på Marcelo i vår podd Forskarprat

Forskarnas upptäckt: stort metangasläckage på Östersjöns djupaste botten PODD: Under en forskningsexpedition 2023 till Landsortsdjupet, Östersjöns djupaste plats, gjordes en förvånande upptäckt. I ett…

Mina forskargrupper

Miljögeokemi Vi är ett team av forskare som studerar frågor inom ämnet miljögeokemi. Inom detta ämnesområde undersöks den kemiska sammansättningen och de kemiska processerna i jordens ytmiljö,…

Mina pågående forskningsprojekt

Publikationer

Publikationer i urval

Ketzer, J.M., Stranne, C., Rahmati-Abkenar, M., Shahabi-Ghahfarokhi, S., Jaeger, L., et al. (2024). Near seafloor methane flux in the world's largest human-induced dead zone is regulated by sediment accumulation rate. Marine Geology. 468. 107220-107220.
Status: Publicerad
Ketzer, J.M., Praeg, D., Rodrigues, L.F., Augustin, A., Pivel, M.A.G., et al. (2020). Gas hydrate dissociation linked to contemporary ocean warming in the southern hemisphere. Nature Communications. 11 (1). 1-9.
Status: Publicerad

Artikel i tidskrift (Refereegranskat)

Rahmati-Abkenar, M., Alizadeh, M., Shahabi-Ghahfarokhi, S., Jaeger, L., Josefsson, S., et al. (2025). Long-term and future methane geochemistry in the Baltic Sea: A transport-reaction model approach. Science of the Total Environment. 980.
Status: Publicerad
Chang, C., Augustsson, A., Yu, C., Mugwira, R., Carlon, S., et al. (2025). Baseline assessment of metal and microplastic pollution in sediments of a small‑sized harbor in western Baltic Sea (Kalmar, Sweden). Environmental Science and Pollution Research.
Status: Epub för tryck
Van Dam, F., Kietavainen, R., Westmeijer, G., Reinhardt, M., Ono, S., et al. (2025). Microbial methanogenesis fueled by freshwater infiltration and oil biodegradation in the Siljan impact structure, Sweden. Discover Applied Sciences. 7 (1).
Status: Publicerad
Pimentel, G.L., Puhl, E., Da Silva, D.B., De Azevedo, K.S., Schenk, C.V., et al. (2025). Sediment deformation and structures formed by gas migration and seafloor exudation : an experimental approach. Marine Geology. 484.
Status: Publicerad
Seidel, L., Broman, E., Ståhle, M., Bergström, K., Forsman, A., et al. (2024). Climate change induces shifts in coastal Baltic Sea surface water microorganism stress and photosynthesis gene expression. Frontiers in Microbiology. 15.
Status: Publicerad
Ketzer, J.M., Stranne, C., Rahmati-Abkenar, M., Shahabi-Ghahfarokhi, S., Jaeger, L., et al. (2024). Near seafloor methane flux in the world's largest human-induced dead zone is regulated by sediment accumulation rate. Marine Geology. 468. 107220-107220.
Status: Publicerad
Maraschin, A.J., Luvizotto, G.L., Ketzer, J.M., Mizusaki, A.M., Ferreira De Menezes, M.R. (2024). On the radiometric significance of glauconies in studies of provenance : an example of the Quaternary marine sequences of the Rio Grande Cone (Pelotas Basin, Southern Brazil). Journal of South American Earth Sciences. 141.
Status: Publicerad
Li, S., Nilsson, E., Seidel, L., Ketzer, J.M., Forsman, A., et al. (2024). Baltic Sea coastal sediment-bound eukaryotes have increased year-round activities under predicted climate change related warming. Frontiers in Microbiology. 15.
Status: Publicerad
Ketzer, J.M., Praeg, D., Augustin, A.H., Rodrigues, L.F., Steiger, A.K., et al. (2023). Gravity complexes as a focus of seafloor fluid seepage : the Rio Grande Cone, SE Brazil. Scientific Reports. 13 (1).
Status: Publicerad
Seidel, L., Sachpazidou, V., Ketzer, J.M., Hylander, S., Forsman, A., et al. (2023). Long-term warming modulates diversity, vertical structuring of microbial communities, and sulfate reduction in coastal Baltic Sea sediments. Frontiers in Microbiology. 14.
Status: Publicerad
Seidel, L., Broman, E., Nilsson, E., Ståhle, M., Ketzer, J.M., et al. (2023). Climate change-related warming reduces thermal sensitivity and modifies metabolic activity of coastal benthic bacterial communities. The ISME Journal. 17. 855-869.
Status: Publicerad
Praeg, D., Silva, C.G., Reis, A.T.D., Cruz, A., Ketzer, J.M., et al. (2022). Seismic evidence of gas hydrate and seafloor fluid escape on the upper Amazon deep-sea fan, Brazilian equatorial margin. Brazilian Journal of Geophysics. 40 (3).
Status: Publicerad
Seidel, L., Ketzer, J.M., Broman, E., Shahabi-Ghahfarokhi, S., Rahmati-Abkenar, M., et al. (2022). Weakened resilience of benthic microbial communities in the face of climate change. ISME Communications. 2 (1).
Status: Publicerad
Shahabi-Ghahfarokhi, S., Rahmati-Abkenar, M., Matson, J.G., Karimi, H., Yu, C., et al. (2022). Removal and potential recovery of dissolved metals from acid sulfate soil drainage by spent coffee-grounds and dissolved organic carbon. Environmental Advances. 8.
Status: Publicerad
Proenca, A.M., Oliveira, M.M., Neves, P.F.R., Giongo, A., De Oliveira, R.R., et al. (2022). Genomic, biochemical, and phylogenetic evaluation of bacteria isolated from deep-sea sediment harboring methane hydrates. Archives of Microbiology. 204 (4).
Status: Publicerad
Shahabi-Ghahfarokhi, S., Åström, M.E., Yu, C., Lindquist, T., Djerf, H., et al. (2022). Extensive dispersion of metals from hemiboreal acid sulfate soil into adjacent drain and wetland. Applied Geochemistry. 136.
Status: Publicerad
Santos, V.H.J.M.D., Engelmann, P.D.M., Marconatto, L., Borge, L.G.D.A., Palhano, P.D.L., et al. (2022). Exploratory analysis of the microbial community profile of the municipal solid waste leachate treatment system : A case study. Waste Management. 141. 125-135.
Status: Publicerad
Shahabi-Ghahfarokhi, S., Rahmati-Abkenar, M., Jaeger, L., Josefson, S., Djerf, H., et al. (2022). The response of metal mobilization and redistribution to reoxygenation in Baltic Sea anoxic sediments. Science of the Total Environment. 837.
Status: Publicerad
Westmeijer, G., Mehrshad, M., Turner, S., Alakangas, L., Sachpazidou, V., et al. (2022). Connectivity of Fennoscandian Shield terrestrial deep biosphere microbiomes with surface communities. Communications Biology. 5 (1).
Status: Publicerad
Stranne, C., O'regan, M., Hong, W., Bruchert, V., Ketzer, J.M., et al. (2022). Anaerobic oxidation has a minor effect on mitigating seafloor methane emissions from gas hydrate dissociation. Communications Earth & Environment. 3 (1).
Status: Publicerad
Shahabi-Ghahfarokhi, S., Åström, M.E., Josefsson, S., Apler, A., Ketzer, J.M. (2021). Background concentrations and extent of Cu, As, Co, and U contamination in Baltic Sea sediments. Journal of Sea Research. 176.
Status: Publicerad
Rahmati-Abkenar, M., Alizadeh, M., Ketzer, J.M. (2021). A New Dynamic Modeling Approach to Predict Microbial Methane Generation and Consumption in Marine Sediments. Energies. 14 (18).
Status: Publicerad
Shahabi-Ghahfarokhi, S., Josefsson, S., Apler, A., Kalbitz, K., Åström, M.E., et al. (2021). Baltic Sea sediments record anthropogenic loads of Cd, Pb, and Zn. Environmental Science and Pollution Research. 28. 6162-6175.
Status: Publicerad
Pires, J.P., Ramos, A.D.S., Mattos, C.F., Ketzer, J.M., Lourega, R.V. (2021). Analysis of the Effect of Organic Salts Derived from L-Phenylalanine Amino Acid as Kinetic Promoters/Inhibitors of CO₂ Hydrates. Energy & Fuels. 35 (9). 8095-8101.
Status: Publicerad
Vernooij, R., Siqueira, T.D.A., Hangx, S., Spiers, C., Ketzer, J.M., et al. (2021). CO₂‐water‐rock interactions in undeformed and sheared claystone caprocks from Northern Europe. Greenhouse Gases : Science and Technology. 11 (2). 232-250.
Status: Publicerad
Giongo, A., Dos Anjos Borges, L.G., Marconatto, L., Palhano, P.D.L., Serbent, M.P., et al. (2020). Adaption of microbial communities to the hostile environment in the Doce River after the collapse of two iron ore tailing dams. Heliyon. 6 (8). 1-16.
Status: Publicerad
Ketzer, J.M., Praeg, D., Rodrigues, L.F., Augustin, A., Pivel, M.A.G., et al. (2020). Gas hydrate dissociation linked to contemporary ocean warming in the southern hemisphere. Nature Communications. 11 (1). 1-9.
Status: Publicerad
Rodrigues, L.F., Macario, K.D., Anjos, R.M., Ketzer, J.M., Maraschin, A.J., et al. (2020). Origin and alteration of organic matter in hydrate-bearing sediments of the Rio Grande Cone, Brazil : evidence from biological, physical, and chemical factors.. Radiocarbon. 62 (1). 197-206.
Status: Publicerad
Braga, R., Iglesias, R.S., Romio, C., Praeg, D., Miller, D., et al. (2020). Modelling methane hydrate stability changes and gas release due to seasonal oscillations in bottom water temperatures on the Rio Grande cone, offshore southern Brazil. Marine and Petroleum Geology. 112. 1-15.
Status: Publicerad
Da Silva Ramos, A., Pires, J.P., Ketzer, J.M., De Araujo, G.E., Lourega, R.V. (2020). Synthesis of new CO₂ hydrate inhibitors. Journal of Natural Gas Science and Engineering. 75. 1-6.
Status: Publicerad
Giongo, A., Haag, T., Medina-Silva, R., Heemann, R., Pereira, L.M., et al. (2020). Distinct deep subsurface microbial communities in two sandstone units separated by a mudstone layer. Geosciences Journal. 24. 267-274.
Status: Publicerad
Ramos, A.D.S., Pires, J.P., Ketzer, J.M., Lourega, R.V. (2020). Organic salts as kinetic and thermodynamic inhibitors for CO₂ hydrate precipitation. Journal of Natural Gas Science and Engineering. 82. 1-8.
Status: Publicerad
Ketzer, J.M., Praeg, D., Pivel, M., Augustin, A., Rodrigues, L.F., et al. (2019). Gas Seeps at the Edge of the Gas Hydrate Stability Zone on Brazil’s Continental Margin. Geosciences. 9 (5). 1-11.
Status: Publicerad
Rodrigues, L., Ketzer, J.M., Oliveira, R., Dos Santos, V., Augustin, A., et al. (2019). Molecular and Isotopic Composition of Hydrate-Bound, Dissolved and Free Gases in the Amazon Deep-Sea Fan and Slope Sediments, Brazil. Geosciences. 9 (2). 1-15.
Status: Publicerad
Rodrigues, L.F., Ramos, A., De Araujo, G., Silveira, E., Ketzer, J.M., et al. (2019). High-Pressure and Automatized System for Study of Natural Gas Hydrates. Energies. 12 (16).
Status: Publicerad
Tharimela, R., Augustin, A., Ketzer, J.M., Cupertino, J., Miller, D., et al. (2019). 3D CSEM imaging of gas hydrates : insights from the Pelotas Basin, offshore Brazil.. Interpretation. 7 (4). SH111-SH131.
Status: Publicerad
Cedeno, D.G., Conceicao, R.V., Wilbert De Souza, M.R., Schimdt Quinteiro, R.V., Carniel, L.C., et al. (2019). An experimental study on smectites as nitrogen conveyors in subduction zones. Applied Clay Science. 168. 409-420.
Status: Publicerad
Stranne, C., O’regan, M., Jakobsson, M., Brüchert, V., Ketzer, J.M. (2019). Can anaerobic oxidation of methane prevent seafloor gas escape in a warming climate?. Solid Earth. 10 (5). 1541-1554.
Status: Publicerad
Ketzer, J.M., Augustin, A., Rodrigues, L.F., Oliveira, R., Praeg, D., et al. (2018). Gas seeps and gas hydrates in the Amazon deep-sea fan. Geo-Marine Letters. 38 (5). 429-438.
Status: Publicerad
Medina-Silva, R., De Oliveira, R.R., Pivel, M.A.G., Borges, L.G.A., Simao, T.L.L., et al. (2018). Microbial diversity from chlorophyll maximum, oxygen minimum and bottom zones in the southwestern Atlantic Ocean. Journal of Marine Systems. 178. 52-61.
Status: Publicerad
Iglesias, R.S., Ketzer, J.M., Maraschin, A.J., Sbrissa, G. (2018). Characterization and modeling of CO2‐water‐rock interactions in Hygiene Sandstones (Upper Cretaceous), Denver Basin, aimed for carbon dioxide geological storage. Greenhouse Gases : Science and Technology. 8 (4). 781-795.
Status: Publicerad
Engelmann, P.D.M., Dos Santos, V.H.J.M., Barbieri, C.B., Augustin, A.H., Ketzer, J.M., et al. (2018). Environmental monitoring of a landfill area through the application of carbon stable isotopes, chemical parameters and multivariate analysis. Waste Management. 76. 591-605.
Status: Publicerad
Da S. Ramos, A., De Araujo, G.E., Siviero, L., Ketzer, J.M., Heemann, R., et al. (2018). Comparative assessment between different sample preparation methodologies for PTGA CO₂ adsorption assays—Pellet, powder, and fragment samples. Adsorption Science and Technology. 36 (7-8). 1441-1455.
Status: Publicerad
Schütz, M.K., Lopes, N.F., Cenci, A., Ketzer, J.M., Einloft, S., et al. (2018). Influence of Alkaline Additives and Buffers on Mineral Trapping of CO₂ under Mild Conditions. Chemical Engineering & Technology. 41 (3). 573-579.
Status: Publicerad
Müller Bicca, M., Philipp, R.P., Jelinek, A.R., Ketzer, J.M., Dos Santos Scherer, C.M., et al. (2017). Permian-Early Triassic tectonics and stratigraphy of the Karoo Supergroup in northwestern Mozambique. Journal of African Earth Sciences. 130. 8-27.
Status: Publicerad
Dos Santos, V.H.J.M., Ketzer, J.M., Rodrigues, L.F. (2017). Classification of Fuel Blends Using Exploratory Analysis with Combined Data from Infrared Spectroscopy and Stable Isotope Analysis. Energy & Fuels. 31 (1). 523-532.
Status: Publicerad
Engelmann, P.D.M., Dos Santos, V.H.J.M., Moser, L.I., Do Canto Bruzza, E., Barbieri, C.B., et al. (2017). Environmental monitoring of water resources around a municipal landfill of the Rio Grande do Sul state, Brazil. Environmental Science and Pollution Research. 24 (26). 21398-21411.
Status: Publicerad
Medina-Silva, R., Oliviera, R.R., Trindade, F.J., Borges, L.G.A., Simao, T.L.L., et al. (2017). Microbiota associated with tubes of Escarpia sp. from cold seeps in the southwestern Atlantic Ocean constitutes a community distinct from that of surrounding marine sediment and water. Antonie van Leeuwenhoek. International Journal of General and Molecular Microbiology. 111 (4). 533-550.
Status: Publicerad
Rodrigues, L.F., Ketzer, J.M., Lourega, R.V., Augustin, A.H., Sbrissa, G., et al. (2017). The influence of methane fluxes on the sulfate/methane interface in sediments from the Rio Grande Cone Gas Hydrate Province, southern Brazil : A influência dos fluxos de metano na interface sulfato/metano em sedimentos de hidrato de gás do Cone do Rio Grande, Sul do Brasil. Brazilian Journal of Geology. 47 (3). 369-381.
Status: Publicerad
Dos Santos, V.H.J.M., Ramos, A.S., Pires, J.P., Engelmann, P.D.M., Lourega, R.V., et al. (2017). Discriminant analysis of biodiesel fuel blends based on combined data from Fourier Transform Infrared Spectroscopy and stable carbon isotope analysis. Chemometrics and Intelligent Laboratory Systems. 161. 70-78.
Status: Publicerad
Siqueira, T.A., Iglesias, R.S., Ketzer, J.M. (2017). Carbon dioxide injection in carbonate reservoirs : a review of CO2-water-rock interaction studies. Greenhouse Gases : Science and Technology. 7 (5). 802-816.
Status: Publicerad
Giongo, A., Haag, T., Lopes Simao, T.L., Medina-Silva, R., Utz, L.R.P., et al. (2016). Discovery of a chemosynthesis-based community in the western South Atlantic Ocean. Deep Sea Research Part I : Oceanographic Research Papers. 112. 45-56.
Status: Publicerad
Ramos, A.D.S., Rodrigues, L.F., De Araujo, G.E., Pozocco, C.T.M., Ketzer, J.M., et al. (2015). Geochemical Characterization of Irati And Palermo Formations (Parana Basin-Southern Brazil) for Shale Oil/Gas Exploration. Energy Technology. 3 (5). 481-487.
Status: Publicerad
Miller, D.J., Ketzer, J.M., Viana, A.R., Kowsmann, R.O., Freire, A.F.M., et al. (2015). Natural gas hydrates in the Rio Grande Cone (Brazil) : A new province in the western South Atlantic. Marine and Petroleum Geology. 67. 187-196.
Status: Publicerad
Iglesias, R.S., Ketzer, J.M., Melo, C.L., Heemann, R., Machado, C.X. (2015). Carbon capture and geological storage in Brazil : an overview. Greenhouse Gases : Science and Technology. 5 (2). 119-130.
Status: Publicerad
Rodrigues, L., Goudinho, F., Laroque, D., Lourega, R., Heemann, R., et al. (2014). An Alternative Gas Chromatography Setting for Geochemical Analysis.. Journal of Chemical Engineering & Process Technology. 5.
Status: Publicerad
Santarosa, C.S., Crandall, D., Haljasmaa, I.V., Hur, T., Fazio, J.J., et al. (2013). CO₂ sequestration potential of Charqueadas coal field in Brazil. International Journal of Coal Geology. 106. 25-34.
Status: Publicerad

Artikel i tidskrift (Övrigt vetenskapligt)

Snyder, G.T., Thurber, A.R., Dupre, S., Ketzer, J.M., Ruppel, C.D. (2024). Editorial : From cold seeps to hydrothermal vents: geology, chemistry, microbiology, and ecology in marine and coastal environments. Frontiers in Earth Science. 12.
Status: Publicerad

Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)

Ketzer, J.M. (2002). Diagenesis and Sequence Stratigraphy : an integrated approach to constrain evolution of reservoir quality in sandstones. Doctoral Thesis. Uppsala, Acta Universitatis Upsaliensis.

Kapitel i bok, del av antologi (Refereegranskat)

Praeg, D., Migeon, S., Mascle, J., Unnithan, V., Ketzer, J.M. (2022). A Gas Hydrate System of Heterogeneous Character in the Nile Deep-Sea Fan. World Atlas of Submarine Gas Hydrates in Continental Margins. Springer. 437-447.
Ketzer, J.M., Viana, A., Miller, D., Augustin, A., Rodrigues, F., et al. (2022). Gas Hydrate Systems on the Brazilian Continental Margin. World Atlas of Submarine Gas Hydrates in Continental Margins. Springer. 343-352.
Ketzer, J.M., Iglesias, R., Einloft, S. (2017). Reducing Greenhouse Gas Emissions with CO₂ Capture and Geological Storage.. Handbook of climate change mitigation and adaptation.. Springer. 2197-2237.

Kapitel i bok, del av antologi (Övrigt (populärvetenskap, debatt))

Cupertino, J.A., Augustin, A.H., Rodrigues, L.F., Ketzer, J.M., Viana, A.R., et al. (2022). Estado da arte das ocorrências de hidratos de gás ao longo da margem continental Brasileira. Economia azul - vetores para o desenvolvimento do Brasil.. Sao Paulo, Marinha do Brasil. 623-648.

Patent (Övrigt (populärvetenskap, debatt))

Steiger, A.K., Ketzer, J.M. (2015). Equipment and process to manipulate and transfer fluid samples collected at high pressure (deep sea)..
Silva, I., Ketzer, J.M., Steiger, A. (2014). Device for collecting sample of fluids in underwater medium..

Samlingsverk (redaktörskap) (Övrigt (populärvetenskap, debatt))

Ketzer, J.M., Machado, C., Rockett, G., Iglesias, R. (2016). Brazilian Atlas of CO₂ Capture and Geological Storage : Atlas Brazileiro de Captura e Armazenamento Geologico de CO₂. EDIPUCRS. 95.

Konstnärlig output (Övrigt (populärvetenskap, debatt))

Brodén, K., Forss, J., Hylander, S., Ketzer, J.M., Pinhassi, J., et al. (2023). Vi ser på vatten : Under ytan. Stockholm, Lava Förlag.
Faktabok om vatten för barn 6-9 år.
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Marcelo Ketzer

Undervisning

Forskning

Nyheter

Lyssna på Marcelo i vår podd Forskarprat

Mina forskargrupper

Mina pågående forskningsprojekt

Publikationer

Publikationer i urval

Artikel i tid­skrift (Referee­granskat)

Artikel i tid­skrift (Övrigt veten­skapligt)

Doktors­avhandling, samman­läggning (Övrigt veten­skapligt)

Kapitel i bok, del av antologi (Referee­granskat)

Kapitel i bok, del av antologi (Övrigt (populär­vetenskap, debatt))

Patent (Övrigt (populär­vetenskap, debatt))

Samlings­verk (redaktör­skap) (Övrigt (populär­vetenskap, debatt))

Konstnärlig output (Övrigt (populär­vetenskap, debatt))