Refine search
Results 1-10 of 26
Soil acidification in loess and clay soils in the Netherlands
2000
Salm, C. van der | Vries, W. de
Critical loads of sulphur and nitrogen for terrestrial ecosystems in Europe and Northern Asia influenced by different soil chemical criteria.
2008
Reinds, G.J. | Posch, M. | Vries, de, W. | Slootweg, J. | Hettelingh, J.P.
A critical load data base was developed for Europe and Northern Asia using the latest data bases on soils, vegetation, climate and forest growth. Critical loads for acidity and nutrient nitrogen for terrestrial ecosystems were computed with the Simple Mass Balance model. The resulting critical loads are in accordance with critical loads from previous global empirical studies, but have a much higher spatial resolution. Critical loads of acidity are sensitive to both the chemical criterion and the critical limit chosen. Therefore a sensitivity analysis of critical loads was performed by employing different chemical criteria. A critical limit based on an acid neutralizing capacity (ANC) of zero resulted in critical loads that protect ecosystems against toxic concentrations of aluminium and unfavourable Al/Bc ratios, suggesting that ANC could be an alternative to the commonly used Al/Bc ratio. Critical loads of nutrient nitrogen are sensitive to the specified critical nitrate concentration, especially in areas with a high precipitation surplus. If limits of 3¿6 mg N l¿1 are used for Western Europe instead of the widely used 0.2 mg N l¿1, critical loads double on average. In low precipitation areas, the increase is less than 50%. The strong dependence on precipitation surplus is a consequence of the simple modelling approach. Future models should explore other nitrogen parameters (such as nitrogen availability) instead of leaching as the factor influencing vegetation changes in terrestrial ecosystems.
Show more [+] Less [-]Base cation supply in spruce and beech ecosystems of the Strengbach catchment (Vosges mountains, N-E France)
1998
Fichter, J. (Equipe Cycles Biogeochimiques de l'Unite Ecosystemes Forestiers INRA, Champenoux (France).) | Dambrine, E. | Turpault, M.P. | Ranger, J.
Relationship between sugar maple decline and corresponding chemical changes in the stem tissue
1997
Mohamed, H.K. (Toronto Univ., Toronto, Ont. (Canada). Faculty of Forestry) | Pathak, S. | Roy, D.N. | Hutchinson, T.C. | McLaughlin, D.L. | Kinch, J.C.
Metal extractability and availability in a soil after heavy application of either nickel or lead in different forms
1997
Nogales, R. (Estacion Experimental del Zaidin CSIC, Granada (Spain).) | Gallardo-Lara, F. | Benitez, E. | Soto, J. | Hervas, D. | Polo, A.
SO2 and NH3 deposition as possible causes for the extinction of Arnica montana L.
1992
Fennema, F. (Rijksinstituut voor Natuurbeheer, Arnhem (Netherlands))
Soil acidification and element fluxes of a Fagus sylvatica forest as influenced by simulated nitrogen deposition
1992
Bergkvist, B. (Lund Univ. (Sweden). Dept. of Plant Ecology) | Folkeson, L.
Liming acid streams: aluminium toxicity to fish in mixing zones
1991
Weatherley, N.S. (Wales Univ., Llanelli, Dyfed (United Kingdom). Coll. of Cardiff, Catchment Research Group) | Rutt, G.P. | Thomas, S.P. | Ormerod, S.J.
Environmental pollution and impacts on soils and forests nutrition in North America
1990
Johnson, D.W. (Biological Sciences Center, Reno, NV (USA). Desert Research Inst.) | Ball, J.T.
Initial compensation of acidic deposition in forest ecosystems by different rock meals
1990
Schueler, G. (Forest Research Inst., Trippstadt (Germany, F.R.))
