Nuclear power is suggested as a way to produce energy without emitting CO2. However, radioactive substances (radionuclides) are emitted during regular operations, and risk being released in large amounts in accidents at power plants or during waste transport. Radionuclides are taken up by organisms, and can accumulate in fish. How these accumulate depend on what the fish eat, and the structure of their food web. The composition of aquatic food webs and feeding interactions are however changing with global warming. The aim of this PhD-project is to resolve how radionuclid emissions and discharges from nuclear power plants accumulate in fish and how this varies among Baltic Sea food webs and with climate warming.

To address this you will do field collections of fish around the Baltic Sea, analyse food web structure and radionuclide concentrations in these and in archived biological samples from a whole-ecosystem warming experiment, as well as use dynamic size-resolved food web models to simulate bioaccumulation in fish and develop scenario analyses to study how accumulation of radionuclides (from regular and accidental discharges) in fish change with global warming.

You will be part of our team working on dynamics of fish communities and aquatic food webs, and their responses to climate change, exploitation and other human pressures ( You will also pursue your research and education within our team’s international research network, with possibilities for research visits at other universities.

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