Umwelt-, Ressourcen- und Ökologische Ökonomik

Dr. rer. nat. Jörn Schmidt

Post doc

Wilhelm-Seelig-Platz 1, Raum 312a
Telefon: +49 431 880-5632
Telefax: +49 431 880-3150

Researcher ID


  • 2014 "Best Poster Award" der ICES Annual Science Conference, A Coruna, Spanien
  • 2013 "Best Poster Award“ der ICES Annual Science Conference, Reykjavik, Island
  • 2010 ICES "Out of the box" Award (Special Merit Award), ASC Nantes for the"EcoOcean" game 
  • 2010 "Best Poster Award" des ICES/PICES/FAO Symposiums „Climate Change Effects on Fish and Fisheries: Forecasting impacts, assessing ecosystem responses, and evaluating management strategies“ in Sendai, Japan 
  • 2007 "Best Poster Award" des "4th Zooplankton Production Symposium" in Hiroshima, Japan 

Ausbildung und Werdegang

  • seit Februar 2009 angestellt im Modul B1 "Lebende Ressourcen und Überfischung" des Exzellenz Clusters "Ozean der Zukunf" am Institut für Volkswirtschaftslehre der Christian-Albrechts-Universität zu Kiel
  • 2008 - 2012 IFM-GEOMAR im Rahmen der Umweltverträglichkeitsstudie zur Fehmarn-Belt Querung
  • 2006 - 2009 Projektleiter des deutschen Teils des "International Herring Larvae Survey" (IHLS)
  • 2006 Promotion an der Christian-Albrechts Universität Kiel
  • seit Juli 2003 Wissenschaftlicher Mitarbeiter am Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) in Kiel
  • 2000 Diplom an der Universität Hannover 


  • Deutscher Vertreter im Wissenschaftlichen Kommittee (SCICOM) des Internationalen Rats für Meeresforschung (ICES) (seit 2012)
  • Vertreter im Publikations- und Kommunikationskomitees (PUBCOM) des Internationalen Rats für Meeresforschung (ICES) (seit 2012)
  • Umweltbeauftragter der Wirtschafts- und Sozialwissenschaftlichen Fakultät (seit 2011)
  • Sprecher des Post-Doc Netzwerks IMAP (Integrated Marine Postdoc Network) im Exzellenzcluster “Ozean der Zukunft” (seit 2011)
  • Offizieller Repräsentant des Internationalen Rats für Meeresforschung für die Ad Hoc Working Group of the Whole for the Regular Process on Global Reporting and Assessment of the Marine Environment including Socio-Economic Aspects (AHWGWRP) bei den Vereinten Nationen (UNO) (2011-2015)
  • 2ter Stellvertretender Vorsitzende der Deutschen Gesellschaft für Meeresforschung (DGM) (2014-2015)
  • Mitglied Wissenschaftlicher Rat IFM-GEOMAR (Vertreter  wissenschaftlicher Angestellter) (2008 - 2009)
  • Bibliotheksausschuss IFM-GEOMAR (2007 - 2009)

Publikationen, Arbeitspapiere und Berichte


  • Ba A, Schmidt JO, Dème M, Lancker K, Chaboud C, Cury P, Thiao D, Diouf M, Brehmer P (2017) Profitability and economic drivers of small pelagic fisheries in West Africa: A twenty year perspective. Marine Policy. 76: 152–158. 



  • Marshak AR, Link JS, Shuford R, Monaco ME, Johannesen E, Bianchi G, Anderson MR, Olsen E, Smith,DC, Schmidt JO, Dickey-Collas M (2016) International perceptions of an integrated, multi-sectoral, ecosystem approach to management. ICES Journal of Marine Science,
  • Rickels W, Dovern J, Hoffmann J, Quaas MF, Schmidt JO, Visbeck M (2016) Indicators for Monitoring Sustainable Development Goals: An Application to Oceanic Development in the European Union. Earth's Future doi: eft2.2016EF000353
  • Quaas MF, Reusch TBH, Schmidt JO, Tahvonen O, Voss R (2015). It is the economy, stupid! Projecting the fate of fish populations using ecological–economic modeling. Global Change Biology. 22(1): 264–270. doi 10.1111/gcb.13060 
    preprint including supporting information




  • Eero M, Hjelm J, Behrens J, Buchmann K, Cardinale M, Casini M, Gasyukov P, Holmgren N, Horbowy J, Hüssy K, Kirkegaard E, Kornilovs G, Krumme U, Köster FW, Oeberst R, Pliksh M, Radtke K, Raid T, Schmidt JO, Tomczak M, Vinther M, Zimmermann C, Storr-Paulsen M (2015) Eastern Baltic cod in distress: biological changes and challenges for stock assesment. Ices Journal of Marine Science: doi: 10.1093/icesjms/fsv109
  • Möller KO, Schmidt JO, St.John M, Temming A, Diekmann R, Peters J, Floeter J, Sell AF, Herrmann J-P, Möllmann C (2015) Effects of climate-induced habitat changes on a key zooplankton species. Journal of Plankton Research: doi:10.1093/plankt/fbv033


Arbeitspapier (in Bearbeitung):







  • Möllmann C, Lindegren M, Blenckner T, Bergström L, Casini M, Diekmann R, Flinkman J, Müller-Karulis B, Neuenfeldt S, Schmidt JO, Tomczak M, Voss R, Gårdmark A (2013) Implementing ecosystem-based fisheries management: from single-species to integrated ecosystem assessment and advice for Baltic Sea fish stocks. ICES Journal of Marine Science,
  • Bernreuther M, Schmidt JO, Stepputtis D, Temming A (2013) Vertically resolved prey selectivity and competition of Baltic herring Clupea harengus and sprat Sprattus sprattus. Marine Ecology Progress Series, 489:177-195
  • Tahvonen O, Quaas MF, Schmidt JO, Voss R (2013) Optimal harvesting of an age-structured schooling fishery. Environmental and Resource Economics.
  • Rindorf A, Schmidt JO, Bogstad B, Reeves S, Walther Y (2013) A Framework for Multispecies Assessment and Management, An ICES/NCM Background Document. Nordic Council of Ministers, Copenhagen, 46 pp


Arbeitspapiere und Berichte 

  • Visbeck M, Kronfeld-Goharani U, Neumann B, Rickels W, Schmidt JO, van Doorn E (2013) Fundamental Challenges for Our Future Ocean and Implications for Sustainable Ocean Development. EU-U.S. Conference Series: "Sustainable Oceans: Reconciling Economic Use and Protection", 3rd conference: 'Good Governance for Sustainable Marine Development', Cascais, Portugal, 3-5 June 2013, 19 pp.




  • Quaas MF, Froese R, Herwartz H, Requate T, Schmidt JO, Voss R (2012) Fishing industry borrows from natural capital at high shadow interest rates. Ecological Economics, 82:45-52
  • Schulz J, Peck MA, Barz K, Schmidt JO, Hansen F, Peters J, Renz J, Dickmann M, Mohrholz V, Dutz J, Hirche H-J (2012) Spatial and temporal habitat partitioning by zooplankton in the Bornholm Sea (central Baltic Sea). Progress in Oceanography, 107:3-30
  • Voss R, Peck MA, Hinrichsen H-H, Clemmesen C, Baumann H, Stepputtis D, Bernreuther M, Schmidt JO, Temming A, Köster FW (2012) Recruitment processes in Baltic sprat – a re-evaluation of GLOBEC-Germany hypotheses. Progress in Oceanography, 107:61–79
  • Papaioannou EA, Vafeidis AT, Quaas MF, Schmidt JO (2012). The development and use of a spatial database for the determination and characterization of the state of the German Baltic small-scale fishery sector. Journal of Marine Science, doi:10.1093/icesjms/fss096
  • Voss R, Petereit C, Schmidt JO, Lehmann A, Makarchouk A, Hinrichsen H-H (2012). The spatial dimension of climate-driven temperature change in the Baltic Sea and its implication for cod and sprat early life stage survival. Journal of Marine Systems, 100-101, issue , year 2012, pp. 1 - 8.
  • Schmidt JO, Zeller M (2012). Climate change in the North and Baltic Seas. In (eds.) Narberhaus I, Krause J, Bernitt U, Threatened Biodiversity in the German North and Baltic Seas - Sensitivities towards Human Activities and the Effects of Climate Change. ISBN 978-3-7843-4017-3, pp. 628.


 Arbeitspapiere und Berichte  

  • Groves T, Knapp G, Ledyard J, Murphy J, Schmidt JO (2012) Fisheries games and experiments: applications for education, outreach and science. In: Proceedings of the Sixteenth Biennial Conference of the International Institute of Fisheries Economics & Trade, July 16-20, 2010, Dar es Salaam, Tanzania: Visible Possibilities: The Economics of Sustainable Fisheries, Aquaculture and Seafood Trade. Compiled by Ann L. Shriver. International Institute of Fisheries Economics & Trade, Corvallis, Oregon, USA
  • Thunberg E, Holland D, Nielsen JR, Schmidt JO (2012) Coupled economic-ecological models for ecosystem-based fishery management: exploration of trade-offs between model complexity and management needs. In: Proceedings of the Sixteenth Biennial Conference of the International Institute of Fisheries Economics & Trade, July 16-20, 2010, Dar es Salaam, Tanzania: Visible Possibilities: The Economics of Sustainable Fisheries, Aquaculture and Seafood Trade. Compiled by Ann L. Shriver. International Institute of Fisheries Economics & Trade, Corvallis, Oregon, USA
  • Dankel DJ, Schmidt JO, Bailey J, Fricke D, Nielsen KN, Röckmann C, Strehlow H, Wilson D (2012) Institutional organization and the ecosystem approach for science and advice: A social network analysis of ICES expert groups. ICES, CM, 20 pp.




  • Voss R, Hinrichsen H-H, Stepputtis D, Bernreuther M, Huwer B, Neumann V, Schmidt JO (2011). Egg mortality: predation and hydrography in the central Baltic. ICES J. Mar. Sci. 68(7):1379-1390.
  • Voss R, Hinrichsen H-H, Quaas MF, Schmidt JO and Tahvonen O (2011). Temperature change and Baltic sprat: from observations to ecological-economic modelling. ICES Journal of Marine Science. 68(6): 1244-1256.
  • Schaber M, Haslob H, Huwer B, Harjes A, Hinrichsen H-H, Storr-Paulsen M, Schmidt JO, Voss R, Neumann V, Köster FW (2011). Spatio-temporal overlap of the alien invasive ctenophore (Mnemiopsis leidyi) and ichthyoplankton in the Bornholm Basin (Baltic Sea). Biological Invasions,  13 (12): 2647-2660. 
  • Schaber M, Haslob H, Huwer B, Harjes A, Hinrichsen H-H, Köster FW, Storr-Paulsen M, Schmidt JO, Voss R (2011). The invasive ctenophore Mnemiopsis leidyi in the central Baltic Sea: seasonal phenology and hydrographic influence on spatio-temporal distribution patterns. J. Plankton Res. 33 (7):1053-1065.


Arbeitspapiere und Berichte

  • ICES (2011). Report of the Working Group on Integrated Assessments of the North Sea (WGINOSE), 21-25 February 2011, Hamburg, Germany. ICES CM 2011/SSGRSP:02. 69 pp.




  • Voss R, Schmidt JO, Möllmann C (2010). Baltic Sprat. In: Petitgas P (Ed.) Life cycle spatial patterns of small pelagic fish in the Northeast Atlantic. ICES Cooperative Research Report No. 306. 93 pp
  • Hinrichsen H-H, Peck MA, Schmidt JO, Huwer B, Voss R. (2010). Survival probability of larval sprat in response to decadal changes in diel vertical migration behavior and prey abundance in the Baltic Sea. Limnol Oceanogr 55(4):1485-1498


Arbeitspapiere und Berichte

  • ICES (2010). Report of the Workshop on Introducing Coupled Ecological-Economic Modelling and Risk Assessment into Management Tools (WKIMM), 16-18 June 2010, Kiel, Germany. ICES CM 2010/SSGRSP:05. 44 pp.
  • ICES (2010). Report of the ICES/HELCOM Working Group on Integrated Assessments of the Baltic Sea (WGIAB), 19-23 April 2010, ICES Headquarters, Copenhagen, Denmark. ICES CM 2010/SSGRSP:02. 94 pp.




  • Schmidt JO, van Damme CJG, Röckmann C, Dickey-Collas M (2009) Recolonisation of spawning grounds in a recovering fish stock: recent changes in North Sea herring. Sci Mar 73(S1):153-157.
  • Voss R, Dickmann M, Schmidt JO (2009). Feeding ecology of sprat (Sprattus sprattusL.) and sardine (Sardina pilchardus W.) larvae in the German Bight, North Sea. Oceanologia 51(1):119-140
  • Payne MR, Hatfield EMC, Dickey-Collas M, Falkenhaug T, Gallego A, Groger J, Licandro P, Llope M, Munk P, Rockmann C, Schmidt JO, Nash RDM (2009). Recruitment in a changing environment: the 2000s North Sea herring recruitment failure. ICES J Mar Sci 66(2):272–277


Arbeitspapiere und Berichte

  • ICES (2009). Report of the ICES/HELCOM Working Group on Integrated Assessments of the Baltic Sea (WGIAB), 16-20 March 2009, Rostock, Germany. ICES CM 2009/BCC:02. 81pp.
  • Quaas M,Schmidt JO, Voss R (2009). Fischereimanagement mittels exklusiver Fanggebiete ökonomische Sicht. In Arbeiten des deutschen Fischerei-Verbandes e.V..




  • Schmidt JO, Hinrichsen H-H (2008). Impact of prey field variability on early cod larval survival: a sensitivity study of a Baltic cod Individual-based Model. Oceanologia 50(2):205–220
  • Baumann H, Voss R, Hinrichsen H-H, Mohrholz V, Schmidt JO, Temming A (2008). Investigating the selective survival of summer- over spring-born sprat, Sprattus sprattus, in the Baltic Sea. Fish Res 91(1):1–14.


Arbeitspapiere und Berichte

  • ICES (2008). Report of the Herring Assessment Working Group South of 62 N (HAWG), 11-19 March 2008, ICES Headquarters, Copenhagen. ICES CM 2008/ACOM:02. 601 pp.
  • Lehmann A, Javidpour J, Clemmesen C, Petereit C, Schmidt JO (2008). Mnemiopsis leidyi, a new invader to the Baltic Sea: possible pathways of distribution. BALTEX Newsletter 11:13-15.
  • Schmidt JO, Rohlf N, Gröger JP (2008). Report of the herring larvae surveys in the North Sea in 2007/2008. Kopenhagen: ICES, WD HAWG 2008, 10 pp




  • Haslob H, Clemmesen C, Schaber M, Hinrichsen H, Schmidt JO, Voss R, Kraus G, Köster FW (2007). Invading Mnemiopsis leidyi as a potential threat to Baltic fish. Mar Ecol Prog Ser 349:303–306.
  • Hinrichsen H-H, Lehmann A, Petereit C, Schmidt JO (2007). Correlation analyses of Baltic Sea winter water mass formation and its impact on secondary and tertiary production. Oceanologia 49(3): 381-395.
  • Voss R, Schmidt JO, Schnack D (2007). Vertical distribution of Baltic sprat larvae: changes in patterns of diel migration? ICES J Mar Sci,  65(5):956-962.
  • Clemmesen C, Potrykus A, Schmidt JO (2007). Climate change and European fisheries. Study for the European Parliament's Committee on Fisheries. PDF (English)PDF (Deutsch) PDF (French)


Arbeitspapiere und Berichte

  • ICES (2007). Report of the Study Group on Recruitment Variability in North Sea Planktivorous Fish (SGRECVAP), 7-11 May 2007, Plymouth, UK. ICES CM 2007/LRC:07. 69 pp.
  • ICES (2007). Report of the Herring Assessment Working Group South of 62 N (HAWG), 13 - 22 March 2007, ICES Headquarters. ICES CM 2007/ACFM:11. 532pp.
  • Schmidt JO, Rohlf N, Gröger JP (2007). Report of the herring larvae surveys in the North Sea in 2006/2007. Kopenhagen: ICES, WD HAWG 2007, 10 pp



Arbeitspapiere und Berichte

  •  Schmidt JO, St. John M, Temming A (2006). Get it from the image - aSchmidt new application for VPR derived images. International GLOBEC Newsletter 12.1: 73-74.




  • Hinrichsen H-H, Schmidt JO, Petereit C, Möllmann C (2005). Survival probability of Baltic larval cod in relation to spatial overlap patterns with their prey obtained from drift model studies. ICES J Mar Sci 62(5): 878-885




  • Hinrichsen H-H, Lehmann A, Möllmann C, Schmidt JO (2003). Dependency of larval and juvenile fish survival on retention/dispersion in food limited environments: the Baltic Sea as a case study. Fish Oceanogr 12(4/5): 425-433
  • Scharsack JP, Steinhagen D, Kleczka C, Schmidt JO, Körting W, Michael RD, Leibold W, Schuberth HJ (2003). The haemoflagellate Trypanoplasma borreli induces the production of nitric oxide, which is associated with modulation of carp (Cyprinus carpio L.) leucocyte functions. Fish Shellfish Immunol 14(3): 207-222
  • Scharsack JP, Steinhagen D, Kleczka C, Schmidt JO, Körting W, Michael RD, Leibold W, Schuberth HJ (2003). Head kidney neutrophils of carp (Cyprinus carpio L.) are functionally modulated by the haemoflagellate Trypanoplasma borreli. Fish Shellfish Immunol 14(5): 389-403

Wissenschaftliches Interesse

  • Räumliche ökologisch-ökonomische Modellierung
  • Ökologische und ökonomische Grundlagen für handelbare räumliche Nutzungsrechte
  • Einfluss von Klimawandel auf Fischbestände, speziell in Bezug auf junge Lebensstadien
  • Europäisches Fischereimanagement 

Mitgliedschaft in wissenschaftlichen Arbeitsgruppen

  • ICES WKRISCO: ICES Workshop on Regional Seas Commissions and Integrated Ecosystem Assessment Scoping (2014, co-chair)
  • ICES WKSIBCA: ICES Workshop on Scoping for Integrated Baltic Cod Assessment (2014)
  • ICES WKECOVER: ICES Workshop on Ecosystem Overviews (2013)
  • ICES WKBEMIA: ICES Workshop on Benchmarking Integrated Ecosystem Assessments (2012)
  • ICES WKMULTBAL: ICES Workshop on Integrated/Multispecies Advice for Baltic Fisheries (2012)
  • ICES SGIMM: Study Group on Integration of Economics, Stock Assessment and Fisheries Management (since 2011, co-chair)
  • ICES WGINOSE: Working Group on Integrated Assessments of the North Sea (since 2011)
  • ICES WKIMM: Workshop on Introducing coupled ecological-economic modelling and risk assessment into management tools (2010, co-chair)
  • ICES WGIAB: Working Group on Integrated Assessments of the Baltic Sea (since 2009)
  • ICES WGFS: Working Group on Fishery Systems (since 2009)
  • ICES WGZE: Working group on zooplankton ecology (since 2005)
  • ICES PGHERS: Planning group for herring surveys (2007-2008)
  • ICES HAWG: Herring assessment working group for the area south of 62°N (2007-2008)
  • ICES SGRECVAP: Study group on recruitment variability in North Sea planktivorous fish (2007)