Henri Siljanen, PhD, Post Doctoral Researcher

Expertize: Molecular microbial ecology; metagenomics; metatranscriptomics

E-mail: henri.siljanen (a) uef.fi

Phone: +358 40 355 2295

Room number: Snellmania 4042



The main theme of my research has been microbial metabolism of methane (CH4) and nitrous oxide (N2O) in soils and sediments. These two greenhouse gases contribute about 25% of total radiative forcing of atmosphere, however main processes and factors influencing on consumption and production of these gases are still unknown in boreal and arctic ecosystems.

My primary research interests are:

  • How much microbial processes contribute on ecosystem greenhouse gas balance?
  • How vulnerable these microbial communities are in climate change?
  • Which microbes are catalyzing production and consumption of greenhouse gases in ecosystems?

I am environmental molecular microbiologist. I have master’s degree in biotechnology and I completed my PhD thesis in 2012, and after graduation from Biogeochemistry research-group I have work as a Doctoral researcher.  My PhD thesis title was “Activity and diversity of methanotrophs in a boreal littoral wetland”.

To describe work in the lab, we are using microbial functional genes to study community structure of microbes and gene activity in different model conditions. The research elucidates the lifestyles of microbes in changing climatic conditions.  Experimental work conducted in the field, is then followed with experiments in laboratory with environmental samples, and with enrichment- and purecultures of microbes. In latest project, we are studying effect organic and inorganic nitrogen on nitrification in northern organic soils.

I’m especially interested on microbial consumption of greenhouse gases, and how this so called ecosystem service is functioning in changing climate. My current work focuses on development of focused examination of genomics, transcriptomics and metabolomics of microbial communities metabolizing greenhouse gases and their reaction intermediates and precursors.

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