Ecology. In the article “A meta-analysis of the freshwater cascade” by Michael T. Brett and Charles R. Goldman, which appeared in number 15, July 23, 1996, of Proc. Natl. Acad. Sci. USA (93, 7723–7726), the following correction should be noted. Due to a typesetter’s error that occurred after the page proofs were corrected, the names of the first authors for nine references were omitted. The first authors for the appropriate references are (reference number and author name): 17, Andersson, G.; 22, Langeland, A.; 24, Ranta, E.; 28, Hambright, K. D.; 33, Drenner, R. W.; 35, Mazumder, A.; 36, Meijer, M. L.; 38, Lazzaro, X.; and 49, Christoffersen, K.