Dr. J. Jahnke

Jahnke, J., D. M. Mahlmann, P. Jacobs, U.B. Priefer (2010): The influence of growth conditions on the cellular dry weight per unit biovolume ofKlebsormidium flaccidum (Charophyta), a typical ubiquitous soil alga. Journal of Applied Phycology, DOI 10.1007/s10811-010-9557-z

Jahnke, J., Mahlmann, D.M. (2010): Differences in the cellular dry weight per unit biovolume of Phormidium autumnale (Cyanobacteria) dependent on growth conditions. Journal of Applied Phycology, Phycology, 22, 117-122

Mahlmann, D.M., J. Jahnke, P. Loosen (2008): Rapid determination of the dry weight of single, living cyanobacterial cells using the Mach-Zehnder double-beam interference microscope. European Journal of Phycology 43, 355-364.

Jahnke, J., T. Wehren, U.B. Priefer (2007): In vitro studies on the impact of the naked soil amoeba Thecamoeba similis Greef, feeding on phototrophic soil biofilms. European Journal of Soil Biology 43, 14-22.

Jahnke, J. (2005): Nackte Amöben als Weidegänger auf Bodenalgenbiofilmen.
Mikrokosmos 94, 37-44.

Jahnke, J. (2004): Beobachtungen an terrestrischen Algenbiofilmen mit dem Hell- und Dunkelfeld-Auflichtmikroskop. Mikrokosmos 93, 287-294.

Jahnke, J., U.B. Priefer (2002): Phototrophic biofilms of restored fields in the rhenish lignite mining area: development of soil algal, bacterial, and fungal biomasses. Soil Biology and Biochemistry 34, 1157-1165.

Jahnke, J. (2001): Algenbiofilme auf Bodenoberflächen: Strukturanalyse an Paraffinschnitten. Mikrokosmos 90, 149-156.

Prochnow, J.V., V. Spork, J. Jahnke, C. Schweim (2001): Using dissolved and particulate carbon for the prediction of soft sediment erodibility. Physics and Chemistry of the earth, Part B, Vol 26, No1, 53-58

Spork, V.,J. V. Prochnow, J. Jahnke, J. Köngeter (2000): Auswirkungen benthischer Mikroalgen auf die Erosion kohäsiver Sedimente. Wasser und Boden 52, 21-26

Jahnke, J., B. Kosier, U.B. Priefer (1999): Analyse der Bildung und Diversität von symbiontischen und freilebenden N2-fixierenden Mikrobenpopulationen in rekultivierten Böden des Rheinischen Braunkohlereviers. In Hartmann, A. (Hrsg.): Biologische Sicherheit: BioMonitor, Molekulare Mikrobenökologie, Proceedings zum BMBF-Workshop 1999, GSF-Neuherberg

Spork, V., J.Jahnke, J.Prochnow, J.Köngeter (1997): Stabilizing effect of benthic algae on cohesive sediments. International Journal of Sediment Research 12, 399-406

Spork, V., J.Jahnke, J. Prochnow, J.Köngeter (1997): The influence of diatoms on the stability of mud banks. In Wang, S.S.Y., E.J. Langwendoen, F.D. Shields (Hrsg.): Management of landscapes disturbed by channel incision. The Center for Computational Hydroscience and Engineering, Oxford, Mississippi, 788-793

Jahnke, J. (1992): Dominant species in phytoplankton blooms 1. Emiliania huxleyi (Lohmann) Hay and Mohler. In Lindley, J.A. (ed): ICES Identification leaflets for Plankton No.178, International Council For The exploration of The Sea, Kopenhagen, 1-4

Aletsee, L., J. Jahnke (1992): Growth and productivity of the psychrophilic marine diatoms Thalassiosira antarctica Comber and Nitzschia frigida Grunow in batch cultures at temperatures below the freezing point of sea water. Polar Biology 11, 643-647

Jahnke, J. (1989): The light and temperature dependence of growth rate and elemental composition of Phaeocystis globosa Scherffel and P. pouchetii (Har.)Lagerh. in batch cultures. Netherlands Journal of Sea Research 23, 15-21

Jahnke, J., M.E.M. Baumann (1987): Differentiation between Phaeocystis pouchetii (Har.) Lagerheim and Phaeocystis globosa Scherffel I. Colony shapes and temperature tolerances

Hydrobiological Bulletin 21, 141-147

Jahnke, J., M. Baumann (1986): Die marine Planktonalge Phaeocystis globosa. Eine Massenform unserer Küstengewässer. Mikrokosmos 75, 357-359

Jahnke, J., H.-J. Rick, L. Aletsee (1986): On the light and temperature dependence of the minimum and maximum phosphorus contents in cells of the marine plankton diatom Thalassiosira rotula Meunier. Journal of Plankton research 8, 549-555

M.E.M. Baumann, J.Jahnke (1986): Marine Planktonalgen der Arktis. I. Die Haptophycee Phaeocystis pouchetii. Mikrokosmos 75, 262-265

Jahnke, J., M. Baumann (1983): Chemical and physical effects on the shape and growth of the diatom Biddulphia sinensis Greville in batch cultures: A contribution to bioindication in plankton ecology. Hydrobiological Bulletin 17, 5-20

Jahnke, J., U. H. Brockmann, L. Aletsee, K. D. Hammer (1983): Phytoplankton activity in enclosed and free marine ecosystems in a southern Norwegian fjord during spring 1979. Marine Ecology Progress Series, 14, 19-28

Kattner, G., K. D. Hammer, K. Eberlein, U. H. Brockmann, J. Jahnke, M. Krause (1983): Nutrient and plankton development in Rosfjorden and enclosed ecosystems captured from changing water bodies during POSER. Marine Ecology Progress Series, 14, 29-43

Jahnke, J. (1982): Teratologische Valvenformen bei der marinen Planktondiatomee Biddulphia sinensis. Mikrokosmos 71, 174-178

Kattner, G., U.H. Brockmann, K. Eberlein, K.D. Hammer, J.Jahnke (1982): Enclosed planktonic ecosystems during different stages of a spring bloom in south Norway. Netherlands Journal of Sea Research 16, 353-361

Brockmann, U.H., K.P. Koltermann, E. Dahl, A. Dahle, K. Eberlein, A. Gaertner, G. Gassmann, K.D. Hammer, J.Jahnke, G.. Kattner, M. Krause, J.Kuiper, M. Laake, O. Nagel (1981): Water exchange in Rosfjorden during spring ´79. A detailed account of physical, chemical and biological variations. In: R. Saetre, M. Mork (eds.): The Norwegian Coastal Current. Proceedings from the Norwegian Coastal Current Symposium, Geilo, 1980, University of Bergen, 93-130

Jahnke, J., C. Jordan, H. Wiegel (1980): Eine Population der Mauereidechse, Lacerta muralis Laur. (Reptilia, Lacertidae) in der Nordeifel (Urft-Talsperre). Decheniana 133, 57-61