Changes to the condition of the ice in the North Pole are forcing polar bears to reconsider their diet. A growing number of polar bears are no longer in contact with sea ice during the summer months and are turning their attentions to birds’ eggs instead. This discovery was made by biologists from the University Groningen and their international colleagues.
Sea ice in the North Pole area is shrinking at an alarming rate. This is having serious consequences for the animals that depend on it for survival. Polar bears are a prime example: they need sea ice to capture their prey. Under normal circumstances, the bears follow the shrinking sea ice during the summer, in search of prey. But is this still possible?
Biologists from the University of Groningen and colleagues from overseas have noted a remarkable shift in the dispersal of polar bears, which would appear to correspond with the changing condition of the ice. Since the turn of this century, increasing numbers of polar bears lose contact with the sea ice during the summer months and remain on land instead.
Polar bears need the sea ice to hunt and capture their prey. On land, the eggs of brooding colonies of birds, such as geese and ducks, form a good alternative source of nourishment for the duration of the breeding season. Bears have little difficulty finding the nests and the eggs are packed with energy.
The University of Groningen research project on Spitsbergen shows that once polar bears have discovered a bird colony, they will return the following year. They arrive a few days earlier every year to give themselves a better chance of stealing more eggs. The polar bears’ visits mean that fewer chicks are being hatched. More research is needed to work out the impact on bird populations, and to discover whether polar bears can thrive on birds’ eggs as a long-term food source.
The biologists’ international research shows a remarkable synchronicity between the development described above on the west coast of Spitsbergen and a similar development on the east coast of Greenland. This would seem to indicate that the development is caused by large-scale processes, such as climate change.
WEAVE, an ingenious spectrometer with thousands of movable glass fibres, is almost ready for use by astronomers. This has been announced by a team of astronomers and technicians under the leadership of Scott Trager (University of Groningen). The...
In the series 'Highlights from our electronic collection' we would like to present four titles on the subject of Language & Literature.
Antonis Vakis and Bayu Jayawardhana have been nominated for the 2021 Huibregtsen Prize for their research project ‘Harvesting infinite wave energy with the Ocean Grazer’.
The UG website uses functional and anonymous analytics cookies. Please answer the question of whether or not you want to accept other cookies (such as tracking cookies).
If no choice is made, only basic cookies will be stored. More information