A postdoctoral stipend is available with an emphasis on planktonic N2 fixing symbioses. The position is sponsored by the Carl Trygger Foundation to the laboratory of Professor Rachel A Foster at Stockholm University in the Department of Ecology, Environment and Plant Sciences. At the Department of Ecology, Environment and Plant Sciences, research and teaching are conducted in an international environment. The department has approximately 100 employees, including 25 research groups, 10 postdocs and approximately 35 are PhD students.