Effects of plant species richness on invasion dynamics, disease outbreaks, insect abundances and diversity. - Knops,J..M..H..; Tilman,D..; Haddad,N..M..; Naeem,S..; Mitchell,C..E..; Haarstad,J..; Ritchie,M..E..; Howe,K..M..; Reich,P..B..; Siemann,E..; Groth,J.. (Ecology Letters, 1999)