Tropentag 2011 will take place at the University of Bonn, Germany on 5 - 7 October 2011. The call for papers and the first conference information is now published on the Tropentag website. Original research abstracts of 250-350 words must be submitted using the online form until the deadline of May 15th, 2011. Young scientists are especially encouraged to submit their contributions. All accepted contributions will be published in the conference proceedings and on the Tropentag homepage. Contributions of an interdisciplinary nature will be preferred for oral presentations.