Increasing effects of chronic nutrient enrichment on plant diversity loss and ecosystem productivity over time by Seabloom, EW, Adler, PB, Alberti, J, Biederman, L, Buckley, YM, Cadotte, MW, Collins, SL, Dee, L, Fay, PA, Firn, J, Hagenah, N, Harpole, WS, Hautier, Y, Hector, A, Hobbie, SE, Isbell, F, Knops, JMH, Komatsu, KJ, Laungani, R, MacDougall, A, McCulley, RL, Moore, JL, Morgan, JW, Ohlert, T, Prober, SM, Risch, AC, Schuetz, M, Stevens, CJ, Borer, ET