Dr. Helge-Ansgar Giebel

University of Oldenburg
Institute for Chemistry and Biology
of the Marine Environment (ICBM)
Biology of geological processes
26111 Oldenburg
Germany

E-Mail: giebel[at]icbm.de
Tel.: +49 - 441 - 798 - 3416

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Projects

Ecological significance, biogeography and physiology of the Roseobacter clade in pelagic systems

Scientific interests

Microbial ecology

Bacterial community structure

Dynamics of free and surface-attached bacteria

Biogeography

Design and improvement of methods and experimental setups

Publications

Giebel, H.-A., D. Kalhoefer, A. Lemke, S. Thole, R. Gahl-Janßen, M. Simon and T. Brinkhoff. 2010. Distribution of Roseobacter RCA and SAR11 lineages in the North Sea and characteristics of an abundant RCA isolate. The ISME Journal. In press, online first

Giebel, H.-A., T. Brinkhoff, W. Zwisler, N. Selje and M. Simon. 2009. Distribution of Roseobacter RCA and SAR11 lineages and distinct bacterial communities from the subtropics to the Southern Ocean. Environmental Microbiology 11: 2164-2178. pdf

Brinkhoff, T., H.-A. Giebel and M. Simon. 2008. Diversity, ecology and genomics of the Roseobacter clade: a short overview. Archives of Microbiology 189: 531-539. pdf

Presentations at national and international symposia

Simon, M., Giebel, H.-A., Voget, S., Kalhoefer, D., Daniel, R. and T. Brinkhoff. 2010. The Roseobacter RCA cluster in the North Sea – population dynamics, physiological and genomic properties. 13^th Symposium of the International Society for Microbial Ecology (ISME), Stewards of a changing planet, Seattle, WA, USA, August 22-27. (book of abstracts, poster)

Giebel, H.A., D. Kalhoefer, S. Voget, T. Brinkhoff and M. Simon. 2010. Distribution of Roseobacter RCA and SAR11 lineages in the Southern Ocean and North Sea and characteristics of an abundant RCA isolate. Gordon Research Conferences (GRC), Marine Microbes: From Genes To Global Cycles, Tilton, NH, USA, July 4-9. (book of abstracts, poster).

Giebel, H.-A., D. Kalhoefer, H. Osterholz, S. Voget, T. Brinkhoff and M. Simon. 2010. The Roseobacter clade affiliated (RCA) cluster: Its occurence, diversity and potential significance in marine habitats. Transregional Collaborative Research Center (TRR-51) Kick-off Symposium: Ecology, Physiology and Molecular Biology of the Roseobacter clade: Towards a Systems Biology Understanding of a Globally Important Clade of Marine Bacteria, Delmenhorst, Germany, June 13-15. (book of abstracts, talk).

Hahnke, S., H.-A. Giebel, M. Sperling, H. Osterholz, M. Simon and T. Brinkhoff. 2010. Physiology and biogeography of phytoplankton-associated roseobacters. Transregional Collaborative Research Center (TRR-51) Kick-off Symposium: Ecology, Physiology and Molecular Biology of the Roseobacter clade: Towards a Systems Biology Understanding of a Globally Important Clade of Marine Bacteria, Delmenhorst, Germany, June 13-15. (book of abstracts, talk).

Giebel, H.-A., D. Kalhoefer, H. Osterholz, S. Voget, T. Brinkhoff and M. Simon. 2010. The Roseobacter clade affiliated (RCA) cluster: Its occurence, diversity and potential significance. International workshop: The microbial view of marine biogeochemical cycles, Banyuls-sur-Mer, France, May 19-21. (book of abstracts, talk).

Simon, M., S. Hahnke, H.-A. Giebel, H. Osterholz and T. Brinkhoff. 2010. Drivers of organic matter turnover in the sea – some examples from the Roseobacter clade. International workshop: The microbial view of marine biogeochemical cycles, Banyuls-sur-Mer, France, May 19-21. (book of abstracts, talk).

Giebel, H.-A., R. Gahl-Janßen, D. Kalhoefer, M. Simon and T. Brinkhoff. 2009. Distribution and characterisation of bacteria of the Roseobacter-clade-affiliated (RCA) cluster. Federation on European Microbiological Societies (FEMS), Göteborg, Sweden, June 27-July 3. (book of abstracts, talk).

Giebel, H.-A., M. Sperling, T. Brinkhoff, B. Rink, M. Grayek, J. Staneva, E. Stanev and M. Simon. 2009. Hydrographic control of SAR11 and RCA dynamics in the coastal North Sea. ASLO Aquatic Science Meeting 2009, Nice, France, January 25-30. (book of abstracts, talk)

Giebel, H.-A., T. Brinkhoff and M. Simon. 2008. Regional preferences of the RCA (Roseobacter clade affiliated) cluster and the SAR11 clade: Southern Ocean vs. temperate seas. 2008 Ocean Science Meeting (co-sponsored by the American Society of Limnology and Oceanography (ASLO)), Orlando, Florida, USA, March 2-7. (book of abstracts, poster)

Giebel, H.-A., T. Brinkhoff, Y.-J. Choo, J.-C. Cho and M. Simon. 2007. The RCA (Roseobacter clade affiliated) cluster: Distribution, abundance, relative significance as compared to the SAR11 clade in the Southern Ocean, and physiological characteristics.10^th Symposium on Aquatic Microbial Ecology (SAME), Faro, Portugal, September 2-7. (book of abstracts, p. 99, poster)

Giebel, H.-A., T. Brinkhoff, and M. Simon. 2006. Distribution and abundance of the RCA (Roseobacter clade affiliated) cluster and the SAR11 clade in the Southern Ocean and the North Sea. 11^th Symposium of the International Society for Microbial Ecology (ISME), Vienna, Austria, August 20-25. (book of abstracts, p. 203, poster)

Giebel, H.-A., T. Brinkhoff, and M. Simon. 2005. The RCA (Roseobacter Clade Affiliated) cluster: Its distribution, diversity and abundance in the Southern Ocean and North Sea. Annual Meeting of the German Society of General and Applied Microbiology (VAAM), Jena, Germany, March 19-22. (book of abstracts, p. 150, poster)