MPI for Marine Microbiology
Main Research Interests
I am currently working on the completion of the first quantitative survey of bacterial and archaeal communities in the main water masses of the Fram Strait. Analyses include the quantification of total cell numbers, as well as the relative abundance of the domains Bacteria and Archaea using CARD-FISH (catalyzed reporter deposition-fluorescence in situ hybridization) probes.
The SAR202 Chloroflexi account for up to 30% of the bacterial community in meso- and bathypelagic waters of the open ocean. In sediments, they usually constitute 1-3% of the community. Only in the last few months, studies postulated their ecophysiological function, i.e. the degradation of recalcitrant organic matter. The aim of my master thesis is to analyze SAR202 sequence datasets from Arctic water and sediments, and to investigate their specific abundances, in order to define the ecological niche of SAR202, and to shed some light on a possible benthic-pelagic coupling of specific phylotypes or functional groups of microorganisms in the dark ocean.