Polluted air, water and land can have a far-reaching effect on animals in polar regions. An international team led by Isabella Scheiber, Maarten Loonen and Jan Komdeur from the University of Groningen and including researchers from the universities of Leipzig, Vienna and Wageningen and the University of Groningen Arctic Centre has shown that heavy metals in the ground in Svalbard affect the physiological processes of barnacle goslings (Branta leucopsis) and lead to stress. Their findings have been published in the journal Proceedings of the Royal Society B.
Over 50 years ago, a coal mine imploded close to Ny-Ålesund in Svalbard. Although the village was cleaned up, the area around the deserted mine, which is used as a grazing area by a population of barnacle geese, was not. Previous research by a team led by Maarten Loonen
had already shown that high levels of heavy metals (trace elements) are still present in the area around the deserted mine. These can accumulate in the goose’s body as it grazes. It is known that pollution can affect animal behaviour, and in stressful situations, such as an encounter with a predator, the right behaviour can mean the difference between life and death. The researchers set out to discover the effect of heavy metals on the physiology and behaviour of barnacle goslings in acute stress situations.
The research team studied barnacle goslings
that spent the first days of their lives grazing by the polluted mine or on clean grounds. They measured the level of a stress hormone in the goslings’ droppings and observed their response to a stress test that consisted of isolating the goslings from their families for a short period of time or limiting their freedom. The goslings that grazed by the polluted mine were more restless and had higher levels of the stress hormone in their blood than their siblings that had grazed in the clean areas.
This research shows that past pollution persists for a long period of time and can significantly affect an animal’s stress response. Jan Komdeur: ‘We were astounded because the goslings were exposed to the pollution for an extremely short period of time. However, this was during a critical phase in their development. The long-term effect of this early exposure to trace elements, on reproduction success and the survival of the barnacle goose for example, remains to be seen. In fragile ecosystems such as the polar regions, this effect could be crucial to the species.’
Four and a half years ago, he received the Nobel Prize. During the award ceremony in Stockholm, Ben Feringa made a resolution: I will put science on the map. His mission is being given a new boost with the establishment of the Ben Feringa Fund,...
Scientists at SRON, VU and RUG have now developed a model that predicts whether there is a carbon cycle present on exoplanets, provided the mass, core size and amount of CO2 are known.
On 26 April, Amina Helmi (Bahia Blanca, Argentina, 1970) was appointed Knight in the Order of the Dutch Lion. She is Professor of Dynamics, Structure and Formation of the Milky Way at the Kapteyn Astronomical Institute, which is part of the Faculty...
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