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Nils Risgaard-Petersen

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Nils Risgaard-Petersen
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My research interests covers broad aspects of biogeochemistry including process studies of the C, S, N cycles and the roles and identity of the biogeochemical players in these cycles.  A particular interest of mine is the so-called “electric ecosystems”.  These are ecosystems where the interactions between the organisms and the environment involves long distance or extra cellular electron transport.  In particular I focus on ecosystems colonized by cable bacteria.  Cable bacteria are long filamentous bacteria of the Desulfobulbaceae family that mediate an electric current, thereby coupling spatially separated redox half-reactions over centimeter scales in sediments. The cable bacteria consortium constitutes a unique ecosystem with unique biogeochemistry, unique microbial composition, and, possibly, novel microbial interactions.

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