A synthesis paper about use of expert knowledge in ecological research that I co-wrote with colleagues from Canada and Australia has just been published.  If you plan projects that will use experts – or if you are ever asked to serve as an expert – or if you have to review a proposal that relies on experts, you may find it interesting to read.  Drescher-etal2013_Ecosphere_ExpertsEcologicalResearch.pdf

Drescher, M., A. H. Perera, C. J. Johnson, L. J. Buse, C. A. Drew, and M. A. Burgman. 2013. Toward rigorous use of expert knowledge in ecological research. Ecosphere 4(7):83. http://dx.doi.org/10.1890/ES12-00415.1