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Dive into the research topics where Torkel Gissel Nielsen is active.

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Featured researches published by Torkel Gissel Nielsen.


Journal of Experimental Marine Biology and Ecology | 1991

Effects of large nongrazable particles on clearance and swimming behaviour of zooplankton

Benni Winding Hansen; Per Juel Hansen; Torkel Gissel Nielsen

Abstract Latex beads (diameter 45 μm) were used to mimic pelagic particle composition dominated by large nongrazable particles and to examine their effect on clearance and swimming behaviour of a tintinnid, Favella ehrenbergii , a rotifer, Brachionus plicatilis , a gastropod veliger, Philine aperta , and copepodites of the neritic copepod Acartia tonsa . Clearance was measured as a function of bead concentration and compared with swimming patterns and grazing behaviour. The ciliates and the rotifers were not sensitive to mechanical obstruction by the polystyrene beads. The gastropod veligers and the copepodites, however, change swimming behaviour by increasing and jumping frequencies accompanied by a significant reduction in clearance. These observations imply nthat laboratory grazing rates may overestimate in situ grazing activity if larger, noningestible particles are present in the water coloumn.


Limnology and Oceanography | 1991

Contribution of zooplankton grazing to the decline of a Ceratium bloom

Torkel Gissel Nielsen


Archive | 2016

Early life of key fish species, capelin Mallotus villosus and Atlantic cod Gadus morhua, in West Greenland

Evandro Malanski; Torkel Gissel Nielsen; Peter Munk


Supplement to: Melle, W et al. (2015): Biogeography of key mesozooplankton species in the North Atlantic and egg production of Calanus finmarchicus. Earth System Science Data, 7(2), 223-230, https://doi.org/10.5194/essd-7-223-2015 | 2015

Data collection of depth and time integrated Calanus finmarchicus abundances, averaged temperatures, and integrated Chlorophyll concentration in the North Atlantic Ocean

Webjørn Melle; Jeffrey A. Runge; Erica J. H. Head; Stéphane Plourde; Claudia Castellani; Priscilla Licandro; James J. Pierson; Sigrún Huld Jónasdóttir; Carl G. Johnson; Cecilie Broms; Høgni Debes; Tone Falkenhaug; Eilif Gaard; Astthor Gislason; Michael R. Heath; Barbara Niehoff; Torkel Gissel Nielsen; Pierre Pepin; Erling Kaare Stenevik; Guillem Chust


Archive | 2015

Are the plankton within the mixed layer homogeneously distributed? Implications for bloom-forming theories

Albert Calbet; Agersted; S. Enghoff; Stein Kaartvedt; Eva Friis Møller; Maria Lund Paulsen; Ingrid Solberg; Kam W. Tang; Kajsa Tönnesson; Torkel Gissel Nielsen


In supplement to: Melle, Webjørn; Runge, Jeffrey A; Head, Erica J H; Plourde, Stéphane; Castellani, Claudia; Licandro, Priscilla; Pierson, James; Jónasdóttir, Sigrún Huld; Johnson, C; Broms, Cecilie; Debes, Høgni; Falkenhaug, Tone; Gaard, Eilif; Gislason, Astthor; Heath, Michael R; Niehoff, Barbara; Nielsen, Torkel Gissel; Pepin, Pierre; Stenevik, Erling Kaare; Chust, Guillem (2015): Biogeography of key mesozooplankton species in the North Atlantic and egg production of Calanus finmarchicus. Earth System Science Data, 7(2), 223-230, https://doi.org/10.5194/essd-7-223-2015 | 2015

Data collection of depth and time averaged temperatures in the North Atlantic Ocean

Webjørn Melle; Jeffrey A. Runge; Erica J. H. Head; Stéphane Plourde; Claudia Castellani; Priscilla Licandro; Sigrún Huld Jónasdóttir; Catherine Johnson; Guillem Chust; Cecilie Broms; Høgni Debes; Tone Falkenhaug; Eilif Gaard; Astthor Gislason; Michael R. Heath; Barbara Niehoff; Torkel Gissel Nielsen; Pierre Pepin; Erling Kaare Stenevik


In supplement to: Melle, Webjørn; Runge, Jeffrey A; Head, Erica J H; Plourde, Stéphane; Castellani, Claudia; Licandro, Priscilla; Pierson, James; Jónasdóttir, Sigrún Huld; Johnson, C; Broms, Cecilie; Debes, Høgni; Falkenhaug, Tone; Gaard, Eilif; Gislason, Astthor; Heath, Michael R; Niehoff, Barbara; Nielsen, Torkel Gissel; Pepin, Pierre; Stenevik, Erling Kaare; Chust, Guillem (2015): Biogeography of key mesozooplankton species in the North Atlantic and egg production of Calanus finmarchicus. Earth System Science Data, 7(2), 223-230, https://doi.org/10.5194/essd-7-223-2015 | 2015

Data collection of depth and time integrated Chlorophyll concentration in the North Atlantic Ocean

Webjørn Melle; Jeffrey A. Runge; Erica J. H. Head; Stéphane Plourde; Claudia Castellani; Priscilla Licandro; Sigrún Huld Jónasdóttir; Catherine Johnson; Guillem Chust; Cecilie Broms; Høgni Debes; Astthor Gislason; Michael R. Heath; Barbara Niehoff; Torkel Gissel Nielsen; Pierre Pepin; Erling Kaare Stenevik


In supplement to: Melle, Webjørn; Runge, Jeffrey A; Head, Erica J H; Plourde, Stéphane; Castellani, Claudia; Licandro, Priscilla; Pierson, James; Jónasdóttir, Sigrún Huld; Johnson, C; Broms, Cecilie; Debes, Høgni; Falkenhaug, Tone; Gaard, Eilif; Gislason, Astthor; Heath, Michael R; Niehoff, Barbara; Nielsen, Torkel Gissel; Pepin, Pierre; Stenevik, Erling Kaare; Chust, Guillem (2015): Biogeography of key mesozooplankton species in the North Atlantic and egg production of Calanus finmarchicus. Earth System Science Data, 7(2), 223-230, https://doi.org/10.5194/essd-7-223-2015 | 2015

Data collection of depth and time integrated Calanus finmarchicus abundances in the North Atlantic Ocean

Webjørn Melle; Jeffrey A. Runge; Erica J. H. Head; Stéphane Plourde; Claudia Castellani; Priscilla Licandro; Sigrún Huld Jónasdóttir; Catherine Johnson; Guillem Chust; Cecilie Broms; Høgni Debes; Tone Falkenhaug; Eilif Gaard; Astthor Gislason; Michael R. Heath; Barbara Niehoff; Torkel Gissel Nielsen; Pierre Pepin; Erling Kaare Stenevik


ESSAS Annual Science Meeting: The Role of Ice in the Sea | 2015

Some like it hot - Calanus in Disko Bay

Torkel Gissel Nielsen; Signe Jung-Madsen; Eva Friis Møller


ASLO Aquatic Sciences Meeting 2015 | 2015

Lights and shadows of the feeding ecology of the small copepod Oithona

Sara Zamora-Terol; Torkel Gissel Nielsen; A.D. McKinnon; Enric Saiz

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Benni Winding Hansen

Marine Biological Laboratory

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Rasmus Swalethorp

Technical University of Denmark

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Sanne Kjellerup

Technical University of Denmark

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Peter Munk

Technical University of Denmark

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Mette Dalgaard Agersted

Technical University of Denmark

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