Torkel Gissel Nielsen

Ph.D, Research Professor

Department of Marine Ecology

National Environmental Research Institute

Frederiksborgvej 399

P.O.Box 358

DK-4000 Roskilde


Phone: +45 46301200 (direct +45 46301257)

FAX:     +45 46301211

E-mail:   [email protected]



Currently employed as research professor in marine microbiology. Previously employed 8 years as scientist and senior scientist at Department of Marine Ecology , National Environmental Research Institute and 1,5 years as Scientist at Department of Marine and Coastal Ecology,  Danish Institute for Fisheries Research. M.Sc. (1987) in brackish water Ecology Freshwater Biological Laboratory, Copenhagen University  and Ph.D. (1990) in biological oceanography Marine Biological Laboratory, Copenhagen University


Research  interest

Biological Oceanography in Arctic, Temperate and Tropical ecosystems with special emphasis on the coupling  between oceanographic regimen and the structure of the pelagic food web. Biological structure of food webs associated with interfaces e.g. pycnocline or ice- water interfaces.


5 most recent publications


Rysgaard, S, Nielsen T.G, B.W. Hansen (1999) Seasonal variation in nutrients, pelagic primary production and grazing in a high- arctic coastal marine ecosystem, Young Sound ;North Eastern Greenland. Mar. Ecol. Prog Ser.


Pesant, S., L. Legendre L., Gosselin, M., Bjørnsen, P.K., Fortier L., Michaaud,J. T.G. Nielsen (2000). Pathways of carbon cycling in marine surface water: the fate of small sized phytoplankton in  the Northeast Water Polynya. J. Plank. Res. 22(4): 779-801


Levinsen, H., Nielsen T.G., Hansen B.W. ( 2000) Annual Succession of marine protozoans in the artic with emphasis on winter dynamics. Mar. Ecol. Prog. Ser 206: 119-134


Levinsen, H., Turner, J.T., Nielsen T.G., B.W.Hansen (2000 ) On the trophic coupling between protists and copepods in Arctic marine Ecosystems.- Mar. Ecol. Prog. Ser: 204:65-77


Møller E.F, Nielsen T.G. (2000) . Plankton community structure and carbon cycling off the Wester coast of Greenland, with emphasis on sources of DOM for the bacterial community Aquat. Microbial. Ecol. 22: 13-25.