Torkel Gissel Nielsen

Torkel Gissel Nielsen

Professor

DTU AQUA
National Institute of Aquatic Resources

Section for Oceans and Arctic

Technical University of Denmark

Henrik Dams Allé

Building 201, room 166

2800 Kgs. Lyngby

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News from DTU

2024
Part of graphic art from cover of PhD thesis. Design: Gunaalan Kuddithamby
04 JAN

PhD defence on microplastics and their potential risk to marine plankton

On 10 January 2024, Gunaalan Kuddithamby will defend his PhD thesis. The defence can be followed online and at DTU Lyngby Campus. 

2022
Foto af XX
12 MAY

A small light in the darkness of plastic pollution

A new PhD lights a candle in the darkness of plastic waste. Contrary to the concerns so far, some of the smallest in the marine ecosystem do not ingest microplastics  

Environment and pollution
Water drop with copepod and micro plastics in Arctic landscape. Photo and graphics: Rocio Rodrigues Torres
30 MAR

PhD defence about ingestion and effects of microplastics on marine planktonic food webs

On 6 April 2022, Rocío Rodríguez Torres from DTU Aqua will defend her PhD thesis. It is possible to attend the defence at DTU in Lyngby and online.

Environment and pollution Marine research Polar research
Foto Torkel Gissel Nielsen
21 MAR

In Disko Bay, DTU Aqua follows the signs of climate change

When researchers from DTU Aqua travel to Disko Bay in Greenland this March, it is one trip out of many monitoring trips over the last three decades. And the results speak for themselves: The marine environment has changed markedly, and the basis of the food chain, the plankton, has been affected.

2020
Godthåbsfjorden. Foto: Torkel Gissel Nielsen.
11 AUG

First quantification of microplastics off the coast of Nuuk

A new study shows that concentrations of microscopic plastic particles in the sea along the west coast of Greenland are roughly the same as in the Atlantic Ocean

Food, fish and agriculture Environment and pollution
2019
Vandloppe, C. hyperboreus. Foto: Kirstine Toxværd.
10 DEC

Fewer large, fat-rich copepods off Western Greenland

Birds and fish in the Disko Bay no longer have access to the same amount of two Arctic fat-rich copepod species as they did 25 years ago, according to recent research.

Food, fish and agriculture
23 SEP

Persistent myths about plastics in the sea

Professor Torkel Gissel Nielsen responds daily to questions about plastics in the sea from students and the press. He finds it astonishing that undocumented assertions continue to be repeated so insistently. 

Environment and pollution Marine research
2018
Fish eggs, zooplankton and a blue plastic fibre. Photo: Bastian Huwer, DTU Aqua
13 DEC

New collaboration addresses marine plastic pollution

DTU is co-operating with four other research institutions to investigate the impact of plastic in the ocean and the need for new legislation

Ecosystems Environmental chemistry Fish and shellfish
The researchers—here PhD Kirstine Toxværd—reproduced the life cycle and living conditions of the copepods in an ice cold laboratory. Photo Line Reeh.
12 OCT

Oil spills could harm the Arctic more than expected

Plankton—the foundation of the food chains in the Arctic Ocean—are affected by concentrations of oil pollution much lower than previously assumed.

Marine research Polar research Ecosystems
Stretch of coast, Ghana
15 MAR

DTU will investigate marine pollution in West Africa

Researchers from DTU Aqua are coordinating a new project investigating what pollution means for the marine life in the Gulf of Guinea.

Environment and pollution Ecosystems
2017
Microplastic. Photo: Sabrina Beer.
24 OCT

Microplastics in the Baltic have not risen for 30 years

The concentration of microplastics in water and fish from the Baltic Sea has been constant for the past 30 years, despite a substantial increase in plastic production during the same period. This is the surprising conclusion of a new study just published in Science of the Total Environment.

Ecosystems Fish and shellfish
2015
Kristina Enders and Robin Lenz filtering seawater for microplastic, Sargasso Cruise 2014. Photo: Line Reeh.
27 OCT

New method finds even the tiniest plastics in the sea

Studies have estimated that each year between 4 and 12 million tonnes of plastics end up in the sea, and that the figure is expected to double over the next ten years. But we have only begun to learn what happens with the plastics afterwards. Two students on the MSc programme Aquatic Science and Technology have now developed a method...

Fish and shellfish Marine research Ecosystems
Photo: Line Reeh
23 OCT

Bear watch on the ice

What happens to life in the sea in the Arctic in the event of an oil spill? And will the actual clean-up operation have a negative impact on the marine environment? An international team of oceanographers is attempting to answer these very questions.

Environment and pollution Ecosystems Marine research Ice research
2014
Photo: Line Reeh
16 APR

Danish Eel Expedition 2014: First phase successfully completed

The expedition has at times battled 12-metre Atlantic swells , making it impossible to get equipment in the water. However, expedition leader Peter Munk of DTU Aqua and his research team will return from the Sargasso Sea with unique knowledge about the place where Danish eels are born.

Marine research Ecosystems Climate change Fish and shellfish Fisheries and fish stocks
Sars. Photo: Kjartan Mæstad, Havforskningsinstituttet
30 JAN

Join a Cruise Across the Atlantic - on film

A group of biologists from DTU Aqua crossed the Atlantic in May 2013 on the Norwegian research vessel G.O. Sars as part of a European project, EURO-BASIN. Master student Frederik Wolff Teglhus has made a short film with footage from the trip– for instance explaining how counting the fecal pellets of zooplankton can help us understand...

Marine research Ecosystems Climate change
2013
Calanus Hyberboreus. Photo: R Hopcroft
19 DEC

Pyrene toxicity on Arctic key copepod species

A new study, published in Ecotoxicology, shows lowered reproductive output, reduced grazing, and reduced ability to metabolize pyrene in the copepod Calanus hyberboreus, which suggest that oil contamination may constitute a risk to energy transfer in the Arctic food web and transfer of pyrene to higher trophic levels.

Marine research Ecosystems Climate change