Aarhus University Seal / Aarhus Universitets segl

News from Technical Sciences

Pink-footed geese foraging on arable land in West Jutland. (Photo: Kevin K. Clausen, AU)
Pink-footed geese are found in very large flocks in West Jutland. All the birds need food. (Photo: Jørgen Peter Kjeldsen, ornit.dk)
(A) The proportion of pink-footed geese wintering in Denmark. (B) Development in the area of maize in West and North Jutland where the geese winter, and (C) the proportion of pink-footed geese that continue their migration to the Netherlands. All figures are from the period 1990-2015. (Figure credit: Kevin K. Clausen, AU)

2018.02.28 | Public / media

Maize fields entice geese to winter in Denmark

More and more geese remain in Denmark for the winter. They forage in the growing number of maize fields all over the country. Researchers warn that, in the long term, the many geese may cause problems for agriculture.

Biologist Stine Højlund Pedersen measures the temperature down through one of the collected ice cores. (Photo: Kasper Hancke)
The temperature in North-East Greenland may decrease to -20 oC in May so researchers need to be well-dressed when the laboratory is located on the surface of the sea ice. (Photo: Kasper Hancke)
The researchers have to transport their equipment to the ice from Villum Research Station with snowmobiles. (Photo: Stine Højlund Pedersen)
A small tent on the ice acts as a mini-laboratory. Here, biologist Kasper Hancke measures photosynthesis of the ice algae. (Photo: Stine Højlund Pedersen)

2017.12.08 | Public / media

Sea ice algae bloom in the dark

Researchers from Aarhus University have measured a new world record: Small ice algae on the underside of the Arctic sea ice live and grow at a light level corresponding to only 0.02% of the light at the surface of the ice. Algae are the primary component of the Arctic food web and produce food far earlier in the year than previously thought.