Please watch this conference on youtube
Dr Rick Relyea (Rensselaer Polytechnic Institute, Troy, NY, USA) 
Rick Relyea received his PhD from the University of Michigan in 1998 and is currently the David D. Darrin ’40 Senior Endowed Chair in Biology at Rensselaer Polytechnic Institute (RPI). He has spent his career working to merge the fields of ecology, evolution, and ecotoxicology using a diversity of species and a wide range of experimental venues from the laboratory to outdoor field experiments. His research group has made a number of important discoveries regarding the synergistic effects of contaminants and natural stressors and how contaminant impacts on one species can have substantial impacts on the entire ecosystem due to the pervasive interconnectedness of food webs.