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Dr. Isgard Lemke

The potential of plants to vary their phenotype according to the environment may buffer species against the impacts of global environmental change. I am focussing on intraspecific trait variation within and among populations of temperate forest understorey herbs as a result of phenotypic plasticity or genetic diversity. These species may be especially threatened by environmental changes, since their migration rates are often low or hampered in contemporary, often highly fragmented landscapes. I am especially interested in the phenotypic response of European forest herbs to changes in climate using latitudinal gradient studies (FLEUR-network), greenhouse- and reciprocal transplant experiments.

Kontakt

Arbeitsgruppe Vegetationsökologie und Naturschutzbiologie

Institut für Ökologie
Fachbereich 02
Universität Bremen
Leobener Straße
D-28359 Bremen

 

2014Dissertation (Dr. rer. nat.) "Phenotypic trait variation in forest herbs along environmental gradients in the context of climate change".
2009 - 2014PhD-student, Vegetation Ecology and Conservation Biology, University of Bremen
2002 - 2007University of Osnabrück, Germany
2002'Abitur', Max-Planck-Schule Kiel, Germany

Lemke, I., Kolb, A. & Diekmann, M. (2012) Environmental and genetic components of trait variation in the forest grass Brachypodium sylvaticum. 42th GfÖ Annual Conference, Lüneburg (10.09.‐14.09.2012) (Poster).

Lemke, I., Kolb, A. & Diekmann, M. (2011) Phenotypic trait variation of two forest herbs along a latitudinal gradient. 41th GfÖ Annual Conference, Oldenburg (05.09.‐09.09.2011) (Poster).

Lemke, I., Kolb, A. & Diekmann, M. (2010) Phenotypic plasticity of forest herbs along environmental gradients in the context of climate change. Verhandlungen der Gesellschaft für Ökologie 40: S. 171. 40th GfÖ Annual Conference, Gießen (30.08.‐03.09.2010) (Talk).

  • Introduction to EXCEL: 2015
  • Plant identification (practical course) (Formenkenntnis Pflanzen): 2010-2014
  • Basics in Ecology (practical course) (Grundkurs Ökologie): 2010, 2011, 2012
  • Statistical Data Analysis (practical course) (Statistische Datenauswertung): 2012

Lemke, I., Kolb, A., Pannek, A. & Diekmann, M. Phenotypic and genotypic response of the forest graminoid Brachypodium sylvaticum to experimental warming (in prep).

De Frenne, P., Brunet, J., Cougnon, M., Decocq, G., Graae, B., Hagenblad, J., Hermy, M., Kolb, A., Lemke, I., Ma, S., Orczewska, A., Plue, J., Vranckx, G., Wulf, M. & Verheyen, K. Biological Flora of the British Isles: Milium effusum.

Acharya, K.P., De Frenne, P., Brunet, J., Chabrerie, O., Cousins, S.A.O., Diekmann, M., Hermy, M., Kolb, A., Lemke, I., Plue, J., Verheyen, K., Graae, B.J. Effects of latitude, nitrogen and temperature on trait variation in a native and an exotic, invasive Impatiensspecies (submitted).

Plue, J., De Frenne, P., Acharya, K., Brunet, J., Chabrerie, O., Decocq, G., Diekmann, M., Graae, B.J., Heinken, T., Hermy, M., Kolb, A.,Lemke, I., Liira, J., Naaf, T., Verheyen, K., Wulf, M. & Cousins, S.A.O. Where does the community start, and where does it end? Including dormant species changes the outcome of community analysis (submitted).

Lemke, I.H., Kolb, A., Graae, B.J., De Frenne, P., Acharya, K.P., Blandino, C., Brunet, J., Chabrerie, O., Cousins, S.A.O., Decocq, G., Heinken, T., Hermy, M., Liira, J., Schmucki, R., Shevtsova, A., Verheyen, K. & Diekmann, M. 2015. Patterns of phenotypic trait variation in two temperate forest herbs along a broad climatic gradient.
Plant Ecology 216: 1523–1536.

Hagenblad, J., Hülskötter, J., Acharya, K.P., Brunet, J., Chabrerie, O., Cousins, S.A.O., Dar, P.A., Diekmann, M., De Frenne, P., Hermy, M., Jamoneau, A., Kolb, A., Lemke, I., Plue, J., Reshi, Z.A. & Graae, B.J. 2015. Low genetic diversity despite multiple introductions of the invasive plant species Impatiens glandulifera in Europe. BMC Genetics 16: 103.

Plue, J., De Frenne, P., Acharya, K., Brunet, J., Chabrerie, O., Decocq, G., Diekmann, M., Graae, B.J., Heinken, T., Hermy, M.,Kolb, A., Lemke, I., Liira, J., Naaf, T., Shevtsova, A., Verheyen, K., Wulf, M. & Cousins, S.A.O. 2013. Climatic control of forest herb seed banks along a latitudinal gradient. Global Ecology and Biogeography 22: 1106–1117.

Lemke, I., Kolb, A. & Diekmann, M. 2012. Region and site conditions affect phenotypic trait variation in five forest herbs. Acta Oecologica 39: 18-24.

Hochkirch, A. & Lemke, I. (2011) Asymmetric mate choice, hybridization, and hybrid fitness in two sympatric grasshopper species. Behavioral Ecology and Sociobiology 65: 1637‐1645.