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This thesis is based on the following articles, referred to in the text by their Roman numerals. Additionally, some unpublished results are presented.

I. Jurgens, G., Lindström, K. and Saano, A. 1997. Novel group within kingdom Crenarchaeota from boreal forest soil. Applied and Environmental Microbiology, Vol. 63: 803-805. [Abstract][PDF (226K)]

II. Jurgens, G. and Saano, A. 1999. Diversity of soil Archaea in boreal forest before, and after clear-cutting and prescribed burning. FEMS Microbiology Ecology, Vol. 29: 205-213. [Abstract]

III. Abreu, C., Jurgens, G., De Marco, P. , Saano, A. and Bordalo, A.A. 2001. Crenarchaeota and Euryarchaeota in temperate estuarine sediments. Journal of Applied Microbiology, Vol. 90: 713-718. [Abstract][Full text]

IV. Jurgens, G., Glöckner, F.-O., Amann, R., Saano, A. Montonen, L., Likolammi, M. and Münster, U. 2000. Identification of novel Archaea in bacterioplankton of a boreal forest lake by phylogenetic analysis and fluorescent in situ hybridization. FEMS Microbiology Ecology, Vol. 34: 45-56. [Abstract]

Papers I to IV are reprinted with kind permission of the publishers.


I and II. German Jurgens planned and conducted the experiments, analyzed and interpreted the results as well as wrote the paper, under supervision of project leader Aimo Saano. Kristina Lindström acted as an expert in phylogenetic analysis for paper I.

III. The work in this study was done in cooperation with Cristina Abreu (Portugal) while she was on Socrates scholarship in University of Helsinki during spring 1998. Cristina Abreu conducted the experiment and wrote the paper. German Jurgens planned and instructed the research, conducted the phylogenetic analysis and assisted in writing the paper. Aimo Saano, Paolo de Marco and Adriano Bordalo supervised the work.

IV. German Jurgens planned and conducted the experiments, analyzed and interpreted  the results and wrote the paper. Frank-Oliver Glöckner made the FISH picture and acted as FISH experiments adviser and ARB phylogenetic software expert. Markit Likolammi prepared bacteria biomass and bacteria production measurements and Leone Montonen performed PCR analysis with methyl-coenzyme M reductase primers. Rudolf Amann, Aimo Saano and project leader Uwe Münster supervised the work and assisted in writing.

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