Attributes / relations provided by
♦ ¹Importance of trophic information, simplification and aggregation error in ecosystem models, S. J. Metcalf, J. M. Dambacher, A. J. Hobday, J. M. Lyle, Mar Ecol Prog Ser 360: 25–36, 2008
♦ ²Food Web Relationships of Northern Puget Sound and the Strait of Juan de Fuca : a Synthesis of the Available Knowledge, Charles A. Simenstad, Bruce S. Miller, Carl F. Nyblade, Kathleen Thornburgh, and Lewis J. Bledsoe, EPA-600 7-29-259 September 1979