TY - Generic T1 - Low atmospheric nitrogen loads lead to grass encroachment in coastal dunes, but only on acid soils Y1 - 2009 A1 - Remke, E. A1 - Brouwer, E. A1 - Kooijman, A. A1 - Blindow, A. A1 - Roelofs, J.G.M. JF - Ecosystems VL - 12 ER - TY - Generic T1 - Stimulated growth of Betula pubescens and Molinia caerulea on ombrotrophic bogs: role of high levels of atmospheric nitrogen deposition Y1 - 2003 A1 - Tomassen, H.B.M. A1 - Smolders, A.J.P. A1 - Lamers, L.P.M. A1 - Roelofs, J.G.M. JF - Journal of Ecology VL - 91 ER - TY - Generic T1 - Differential effects of ammonium nitrate on three heathland species Y1 - 1998 A1 - De Graaf, M.C.C. A1 - Bobbink, R. A1 - Roelofs, J.G.M. A1 - Verbank, P.J.M. JF - Plant Ecology VL - 135 ER - TY - JOUR T1 - The effects of air-borne nitrogen pollutants on species diversity in natural and semi-natural European vegetation JF - Journal of Ecology Y1 - 1998 A1 - Bobbink, R. A1 - Hornung, M. A1 - Roelofs, J.G.M. VL - 86 ER - TY - RPRT T1 - Empirical nitrogen critical loads for natural and semi-natural ecosystems Y1 - 1996 A1 - Bobbink, R. A1 - Hornung, M. A1 - Roelofs, J.G.M. JF - in B. Werner and T. Spranger, editors. Manual on methodologies and criteria for mapping critical loads/levels. UN ECE Convention on Long-range Transboundary Air Pollution. PB - Umweltbundesamt CY - Berlin ER - TY - RPRT T1 - Empirical nitrogen critical loads: update since Lokeberg (1992) Y1 - 1995 A1 - Bobbink, R. A1 - Roelofs, J.G.M. ED - Hornung, M. ED - Sutton, M.A. ED - Wilson, R.B. JF - Mapping and modelling of critical loads for nitrogen - a workshop report PB - Institute of Terrestrial Ecology CY - Bush ER - TY - RPRT T1 - Mapping and modelling of critical loads for nitrogen - a workshop report Y1 - 1995 A1 - Bobbink, R. A1 - Roelofs, J.G.M. A1 - Hornung, M. (Eds) A1 - Sutton, M.A. (Eds) A1 - Wilson, R.B. [Eds.] PB - Institute of Terrestrial Ecology CY - Bush ER - TY - JOUR T1 - Nitrogen critical loads for natural and semi-natural ecosystems: the empirical approach JF - Water, Air and Soil Pollution Y1 - 1995 A1 - Bobbink, R. A1 - Roelofs, J.G.M. VL - 85 ER - TY - Generic T1 - Distribution and decline of endangered herbaceous heathland species in relation to the chemical composition of the soil Y1 - 1993 A1 - Houdijk, A.L.F.M. A1 - Verbank, P.J.M. A1 - van Dijk, H.F.G. A1 - Roelofs, J.G.M. JF - Plant and Soil VL - 148 ER - TY - JOUR T1 - Successional changes in the soft-water macrophyte vegetation of (sub)atlantic, sandy, lowland regions during this century JF - Freshwater Biology Y1 - 1990 A1 - Arts, G.H.P. A1 - Van der Velde, G. A1 - Roelofs, J.G.M. A1 - Van Swaay, C.A.M. VL - 24 ER - TY - JOUR T1 - Effects of excessive ammonium deposition on the nutritional status and condition of pine needles JF - Physiologia Plantarum Y1 - 1988 A1 - van Dijk, H.F.G. A1 - Roelofs, J.G.M. VL - 73 ER - TY - Generic T1 - The effects of air-borne ammonium sulphate on Pinus nigra in the Netherlands Y1 - 1985 A1 - Roelofs, J.G.M. A1 - Kempers, A.J. A1 - Houdijk, A.L.F.M. A1 - Jansen, J. JF - Plant Soil VL - 42 ER - TY - JOUR T1 - Impact of acidification and eutrophication on macrophyte communities in soft waters in the Netherlands JF - Aquatic Botany Y1 - 1983 A1 - Roelofs, J.G.M. VL - 17 ER -