1 Department of Bioscience - Soil Fauna Ecology and Ecotoxicology, Department of Bioscience, Science and Technology, Aarhus University2 ECT Oekotoxikologie GmbH, Boettgerstr. 2-14, Flörsheim, 654393 Department of Environmental Chemistry, Eawag, P.O. Box 611, Dübendorf, CH-86004 Fraunhofer IME, Auf dem Aberg 1, Schmallenberg, 573925 F. Hoffmann-La Roche Ltd, Group SHE, Basle, CH–40706 Trent University, 1600 West Bank Drive, Peterborough, ON, K9J 7B87 Department of Bioscience - Soil Fauna Ecology and Ecotoxicology, Department of Bioscience, Science and Technology, Aarhus University
On October 30, 2011 we lost Dr. Thomas Knacker, a much valued and loved colleague, research partner and friend. We deeply regret the loss of an internationally honoured ecotoxicologist. The colleagues and friends that wish to express their sorrow in this contribution include individuals from a variety of organisations and academic institutions in Europe and abroad.