Teacher and Scienstist

Prof. Dr. Hans Toni Ratte

Software development | Training | Evaluations

1968 - 1974 Graduated from the University of Cologne (Biology), Diploma (master) thesis (zoology, molecular genetics, biochemistry)

1974 - 1977 Doctorate at the University of Cologne, mentor: Prof. Dr D. Neumann

1976 - 1979 Administrator of a research assistant position at the University of Cologne 

1979 -1983 Research assistant at the Chair for Biology V (ecology) at Aachen University (at that time led by Prof. Dr Heinrich Kaiser)

Since 1983 Permanent appointment as research associate

WS86/87-WS93/94 Lecturer for the practical course Ecology I

SS1987 - SS1994 Lecturer in Quantitative Biology II (Statistics)

SS1987 - SS1994 Lecturer in "The application of IT in biology"

1997 Habilitation

2003 Appointment as Associate Professor

2011 Retirement

Teaching at RWTH Aachen University

(selected lectures, Seminars, Practical courses)

Quantitative Biology (Introduction to Statistics)
Multivariate Statistics in Ecology

Introduction to Ecology
Ecology and Ecotoxicology of limnic systems
Ecology and Ecotoxicology of terrestric systems
Basics of environmental risk assessment

Mathematikal modelling in Ecology and Ecotoxicology

Several field excursions (Germany, Sweden, Norway, Italy)

External lectures and training courses

Short Course “Mathematical Models in Ecotoxicology; 6th International Symposium "Toxicity Assessment and On-line Monitoring, berlin

Aquatic Ecotoxicology (TU Dresden/Uni Frankfurt; training module “Ecotoxicology” of the Germ. Soc. Toxicol.)

Modules “Statistics” and “Aquatic Ecotoxicology” in the SETAC-GDCh postgraduate training course for certified professional ecotoxicologists 

Training courses in ecotoxicological statistics (University of Coimbra, Aveiro, Portugal (3 x), University of Bilbao, Spain; German Federal Environmental Agency (5 x), Board for the Authorisation of Plant Protection Products and Biocides (Ctgb), Niederlande; industrial companies and contract labs (more than 15x); duration 2 to 5 days)

Membership in Scientific Boards

Member of the Forum Environment of the RWTH Aachen University

German Standardization Committee on Biotesting (DIN, since 1993)

German federal Environmental Agency “Workgroup Ecotoxicology”

OECD Biotest Valdiation Management Group (since 1994)

Steering Committee SETAC CLASSIC Workshop, FhG;

Water initiative in Nordrhine Westphalia

OECD Expert in Aquatic Ecotoxicology and Statistics

Ad-hoc expert at the European Food safety Authority (EFSA), Panel on Plant Health, Plant Protection Products and their Residues, Parma

Reviewer for

Journal of Environmental Chemistry and Toxicology
Water Research,
Umweltwissenschaften und Schadstoffforschung,
Environmental Science and Technology,
Journal of Insect Physiology,
Verhandlungen der Gesellschaft für Ökologie,
Proceedings of the European Workshop of Freshwater Field Tests (EWOFFT) SETAC-Europe, Environmental Toxicology,
Journal Human and Ecological Risk Assessment,
Environmental Science and Pollution Research,
Toxicological and Environmental Chemistry.

Selected publications

  • Jungmann, D.; Bandow, C.; Gildemeister, T.; Nagel, R.; Preuss, T.G.; Ratte, H.T.; Shinn, C.; Weltje, L.; Maes, H. (2009): Toxicity of fenoxycarb to the midge Chironomus riparius after chronic exposure in sediments of different composition. J. Soils Sediments, DOI 10.1007/s11368-009-0056-2
  • Preuss TG, Hammers-Wirtz M, Hommen U, Rubach MN, Ratte HT (2009): Development and validation of an individual based Daphnia magna population model: The influence of crowding on population dynamics. Ecological modelling, 220, 310-329
  • Siehoff S, Hammers-Wirtz M, Strauss T, Ratte HT (2009): Periphyton as alternative food source for the filter-feeding cladoceran Daphnia magna. Freshwater Biology 54: 15-23
  • Floeter C, Ahlf W, Ratte HT (2008) Entwicklung von ökotoxikologischen Instrumenten und ihre rechtliche Implementierung zur marinen ökologischen Risikobewertung von Chemikalien, Pestiziden und Baggergut Umweltwiss Schadst Forsch (2008) DOI 10.1007/s12302-008-0027-z
  • Preuss TG, Telscher M, Ratte HT (2008) Life stage-dependent bioconcentration of a nonylphenol isomer in Daphnia magna. Envir. Pollution 156, 1211–1217
  • Siehoff S, Preuss TG, Ratte HT, Roß-Nickoll M, Lennartz G (2008): The GraS-Model (Grassland-Succession-Model) - A simulation model for the succession of grassland biotopes under various management regimes (developed for the Eifel National Park). Extended Abstract. SER 6th European Conference on Ecological Restoration, Ghent, Belgium.
  • Maes H.M., Ratte H.T. (2007). Fate of 14C-17ྟ-ethinylestradiol in the aquatic environment. Conference proceedings, Micropol & Ecohazard 2007, 5th IWA Specialised Conference on Assessment and Control of Micropollutants / Hazardous Substances in Water, DECHEMA e.V., Frankfurt/Main
  • Ratte HT (2007): Ökotoxikologie: 'Ecospeak' oder Wissenschaft? Versuch einer politischen und wissenschaftlichen Standortbestimmung. UWSF – Z Umweltchem Ökotox 19, Sonderheft Nr. 1, 1–5
  • Jankowski, Th., T. Strauss, H. T. Ratte (2005) Trophic interactions of the freshwater jellyfish Craspedacusta sowerbii, J. Plankton Research 27: 811-823.
  • Ratte HT, Lennartz F, Roß-Nickoll M (2005): Ecosystem dynamics and stability - are the effects of pesticides acceptable? In: Liess et al. (eds.) Effects of pesticides in the field - EPIF, SETAC - Press, 88-90.
  • Coors A., Hammers-Wirtz M., Ratte H.T. (2004) Adaptation to environmental stress in Daphnia magna simultaneously exposed to a xenobiotic. Chemosphere 56: 395-404.
  • Coors, A., Jones, P.D., Giesy, J.P., Ratte, H.T. (2003): Removal of estrogenic activity from municipal waste landfill leachate assesses with a bioassay based on reporter gene expression. Environ. Sci. Technol. 37: 3430-3434.
  • Brock T.C.M and Ratte H.T. (2002) Ecological Risk assessment of pesticides. In: Giddings J.M.; Brock T.C.M.; Heger W.; Heimbach F.; Maund S.J.; Norman S.M.; Ratte H.T.; Schäfers C. and Streloke M. (eds) Community Level Aquatic System Studies - Interpretation Criteria. Society of Environmental Toxicology and Chemistry (SETAC), 2002, ISBN 1-880611-49-x, pp 33-39.
  • Cleuvers, M. and H.T. Ratte (2002a): Phytotoxicity of coloured substances: is Lemna duckweed an alternative to the algal growth inhibition test? Chemosphere 49:9-15.
  • Cleuvers, M. and H.T. Ratte (2002b): The importance of light intensity in algal tests with coloured substances. Water Research 36: 2173-2178.
  • Cleuvers, M., Altenburger, R. and H.T. Ratte (2002): Combination effect of light and toxicity in algal growth inhibition tests. J. Environ Qual., 31:539-547.
  • Giddings J.M.; Brock T.C.M.; Heger W.; Heimbach F.; Maund S.J.; Norman S.M.; Ratte H.T.; Schäfers C. and Streloke M. (2002): Community Level Aquatic System Studies - Interpretation Criteria. Society of Environmental Toxicology and Chemistry (SETAC), pp. 43, ISBN 1-880611-49-x
  • Ratte H.T. (2002): Statistik für ökotoxikologische Testverfahren. In: Fomin A., Markert B.A., Oehlmann, B (Hrsg.): Praktikum zur Ökotoxikologie. Ecomed Verlagsgesellschaft, Landsberg, Germany,  250 Seiten.
  • Ratte H.T., Hammers-Wirtz M., Cleuvers M. (2002): Ecotoxicity testing. In: Markert B.A., Breure A.M., Zechmeister H.G. (eds): Bioindicators and biomonitors. Elsevier Science B.V., pp. 221-255.
  • Strauss,T. and H. T. Ratte (2002): Modelling the vertical variation of temperature and dissolved oxygen in a shallow, eutrophic pond as a tool for analysis of the internal phosphorus fluxes. Verh Internat Verein Limnol 28: 1508-1511.
  • Weyers A., Römbke J., Moser Th., and H. T. Ratte (2002): Statistical Results and Implications of the Enchytraeid reproduction ringtest. Environ. Sci. Technol. 36:2116-2121.
  • Hammers-Wirtz, M. and H.T. Ratte (2001): Offspring fitness in Daphnia: Is the Daphnia reproduction test the appropriate test to extrapolate effects on the population level? Environ Toxicol Chem, 19:1856-1866.
  • Ratte H.T., Hammers-Wirtz M. (2001): Does risk mitigation needs also modified approaches in toxicity testing? Mitt. Bio. Bundesanst. Land- Forstwirtsch. 383:21-24.
  • Schäffer A, Ratte H.T. (2001): Biomagnification of cadmium in aquatic food chains and side effects. In: Proceedings of the SCOPE Workshop “Environmental Cadmium in the Food Chain: Sources, Pathways, and Risks, Scientific Committee on Problems of the Environment (SCOPE) of the International Council for Science (ICSU), pp. 105-109.
  • Jankowski Th. and Ratte H. T. (2000): On the influence of the freshwater jellyfish Craspedacrusta sowerbii on the zooplankton community. Verh. Internat. Verein. Limnol. 27:1-4.
  • Cleuvers, M. und H.T. Ratte (1999): Der Einfluß der Photonenflussdichte auf die Ergebnisse im Algenwachstums-Hemmtest. In: Oehlmann , J. und Markert, B. (Hrsg.): Ökotoxikologie – Ökosystemare Ansätze und Methoden. Ecomed Verlagsgesellschaft, Landsberg, Deutschland.
  • Ratte H.T. (1999): Bioaccumulation and Toxicity of Silver Compounds. Environ. Toxicol. 18: 89-108.
  • Ratte H.T. (1998): Silberverbindungen  - Umweltverhalten, Bioakkumulation und Toxizität. Ecomed, Landsberg, ISBN 3-609-69160-3, 108 pp..
  • Wellman P, Ratte H.T. and F. Heimbach (1998): Primary and secondary effects of methabenzthiazuron on plankton communities in aquatic outdoor microcosms. Aquatic Ecology, 32: 125-134.
  • Cleuvers M, B. Goser, and H.T. Ratte (1997): Life-Strategy Shift by Intraspecific Interaction in Daphnia magna - Change in Reproduction from Quantity to Quality. Oecologia 110, 337-345.
  • Hommen U. und H.T. Ratte (1997): Vom Labor ins Freiland - Modelle zur Effektabschätzung. Z. Umweltchem. Ökotox. 9:267-272.
  • Ratte H.T. (1996 a): Ist die No-Observed Effect Concentration (NOEC) eine geeignete statistische Kenngröße im Biotest? Berichte aus der Biologischen Bundesanstalt für Land- und Forstwirtschaft, 17, 13-19
  • Ratte H.T. (1996 b): Statistical implications of endpoint selection and inspection interval in the Daphnia Reproduction Test - a simulation study. - Environ. Toxicol. Chem. 15, 1831-1843
  • Ratte H.T., B. Klüttgen, and U. Dülmer (1995): Systemananlyse und Modellierung fremdstoffbelasteter experimenteller Lebensgemeinschaften - GSF-Forschungsberichte 2/95, ISSN 0937-9932, pp. 47-56
  • Ratte HT (1995): Statistical Analysis of the Results from the International Toxicity Ring-Test on Sediment-dwelling Chironomus riparius - In: Strehloke M. und H. Köpp (eds) Long-term toxicity test with Chironomus riparius: Development and Validation of a new test system. Mitteilungen aus der Biologischen Bundesanstalt, 315, 49-63
  • Goser B. and H.T. Ratte (1994): Experimental evidence of negative interference in Daphnia magna. - Oecologia 98, 354-361
  • Hommen U. and H.T. Ratte (1994): Application of a plankton simulation model on outdoor-microcosm case studies .- In: Hill, I.R., F. Heimbach, P. Leeuwangh, and P. Matthiessen (eds) Freshwater Field Tests for Hazard Assessment of Chemicals. Lewis Publishers, Michigan, USA, pp. 493-502
  • Hommen U., U. Dülmer, and H.T. Ratte (1994): Monte-Carlo simulations in ecological risk assessment. Proceedings of the Anniversary Conference of the Wageningen Agricultural University 'Predictability and Non-linear Modelling in Natural Sciences and Economics, Kluwer Dordrecht, pp. 460-470
  • Ratte H.T., H.J. Poethke, U. Dülmer, and U. Hommen (1994 a): Future Developments in the Field of Ecological Effects Modelling. - In: Stebbing, A.R.D., K. Travis, and P. Matthiessen, (eds) Environmental Modelling - the Next 10 Years, SETAC Special Publication; ISBN 09522535 0 X; pp. 18-21
  • Ratte H.T., H.J. Poethke, U. Dülmer,. and U. Hommen. (1994 b): Modelling of Aquatic Field Tests for Hazard Assessment. In: Hill, I.R.; Heimbach, F; Leeuwangh, P. and Matthiessen, P. (1994) Freshwater Field Tests for Hazard Assessment of Chemicals. Lewis Publishers, Michigan, USA, pp. 399-424.
  • Thielcke A. and H.T. Ratte (1994): The role of periphyton in primary production in outdoor microcosms treated with 3,4-DCA. - In: Hill, I.R., F. Heimbach, P. Leeuwangh, and P. Matthiessen (eds) Freshwater Field Tests for Hazard Assessment of Chemicals. Lewis Publishers, Michigan, USA, pp. 369-378
  • Hommen U., H.J. Poethke, U. Dülmer and H.T. Ratte (1993): Simulation models to predict ecological risk of toxins in freshwater systems. ICES J. mar. Sci. 50, 337-347.
  • Ratte H.T. (1993): Polystyrene breeding containers evoke slowly growing developmental morphs in Chaoborus crystallinus (Diptera: Chaoboridae). Z. angew. Zool. 79, 299-308
  • Ratte H.T., U. Dülmer, M. Engels und B. Klüttgen (1993a): Vom Individuum zur Biozönose - ein integrierter Forschungsansatz.- Deutsche Gesellschaft für Limnologie, Erweiterte Zusammenfassungen der Jahrestagung 1992, II, 701 - 705
  • Ratte H.T., U. Dülmer, U. Hommen und B. Klüttgen (1993b): Simulationsmodelle in der Ökotoxikologie. RWTH Themen, Berichte aus der Rheinisch-Westfälischen Technischen Hochschule, 2,
  • Engels M. und H.T. Ratte (1992): Randomisierte Ähnlichkeitsanalyse von Lebensgemeinschaften am Beispiel von Mesokosmos-Versuchen in der Ökotoxikologie. - Verh. Ges. Ökol. 21: 303-308
  • Heimbach F, W. Pflüger, and H.T. Ratte (1992): Use of small artificial ponds for assessment of hazards to aquatic ecosystems. - Environ. Toxicol. Chem. 11: 27-34
  • Ratte H.T., U. Dülmer, B. Klüttgen, and M. Pelzer (1992): Investigation and modelling of primary and secondary effects of 3,4 dichloroaniline in experimental aquatic laboratory systems and mesocosms. - Berichte der GSF 1/1992: Proceedings of the Internat. Symp. Ecotox, Munich, Nov. 1990, pp. 
  • Büns M. and H. T. Ratte (1991) The combined effects of temperature and food consumption on body weight, egg production and development time in Chaoborus crystallinus De Geer (Diptera: Chaoboridae - some new evidence for the adaptive value of vertical migration. - Oecologia 88, 470-476
  • Hommen U., H.T. Ratte und H.J. Poethke (1991a): Simulation der Insektizidwirkung auf das Plankton eines Modellökosystems. Verh. d. Ges. f. Ökol. (Freising-Weihenstephan 1990), 20, 815-822.
  • Hommen U., H.T. Ratte, and H.J. Poethke (1991b): Modelling a mesocosm plankton community after insecticide application - a first approach. Syst. Anal. Model. Simul., 8, 821-828
  • Seitz A. and H. T. Ratte (1991): Aquatic ecotoxicoloy: On the problems of extrapolation from laboratory experiments with individuals and populations to community effects in the field. - Comp. Biochem. Physiol. 100C, 301-304
  • Ratte H.T. (1986): Vertical migration and population dynamics of Chaoborus crystallinus (Diptera, Chaoboridae) in thermally stratified waters. Proc. 3rd Europ. Congr. Entomol. Amsterdam, pp. 125-128
  • Ratte H.T. (1985a): Computergestützte Statistikübungen für Biologen. Verh. Ges. Ökol. (Bremen 1983) 13, 479-484
  • Ratte H.T. (1985b): Temperature and Insect Development. In: Hoffmann, K.H. (ed) Environmental Physiology and Biochemistry of Insects. Springer Verlag, Berlin, Heidelberg, pp. 33-66
  • Ratte, H.T. (1979): Tagesperiodische Vertikalwanderung in thermisch geschichteten Gewässern: Einfluß von Temperatur- und Photoperiode-Zyklen auf Chaoborus crystallinus DeGeer (Diptera: Chaoboridae). Arch. Hydrobiol. /Suppl. 57, 1-37