A fully-funded PhD position is offered in the International Leibniz Graduate School Aquatic boundaries and linkages in a changing environment (see: www.igb-berlin.de/aqualink.html) organised by the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) Berlin (Germany). Over a 3-year period, 8 doctoral candidates will receive training that aims at facilitating completion of research leading to high-quality publications. The offered position deals with effects of groundwater seepage on benthic primary producers and their nutrient retention in lakes. Field and laboratory investigations will be carried out to test the hypotheses that groundwater seepage is a determining factor for the development of submerged macrophytes, benthic algae and their interaction in oligotrophic lakes and that these interactions affect the nutrient availability for phytoplankton growth and thus water transparency. The successful candidate must have a Masters degree in Biology, Environment! al Sciences or a related field and a strong commitment to aquatic fieldwork.Applicants should electronically submit a CV, cover letter indicating research interests and experience, names and contact details of two referees, and a PDF copy of the Master’s Thesis in a single pdf to PD Dr. Sabine Hilt (hilt@igb-berlin.de). IGB is devoted to increasing the proportion of women in science and particularly encourages female scientists to apply. Disabled persons with equal qualification will be favoured. Review of applications will begin immediately and continue until December 31. Only shortlisted candidates will be notified.