TY - Generic T1 - Dry deposition of ammonia gas drives species change faster than wet deposition of ammonium ions: evidence from a long-term field manipulation Y1 - 2011 A1 - Sheppard, L.J. A1 - Leith, I.D. A1 - Mizunuma, T. A1 - Cape, J.N A1 - Crossley, A. A1 - Leeson S. A1 - Sutton, M.A. A1 - Fowler, D. A1 - van Dijk, N. JF - Global Change Biology VL - 17 (12) ER -