By G. J. Heij, T. Schneider
This publication includes the consequences and conclusions of in depth learn at the reasons and results of acidification of forests/forest soils and heathland within the Netherlands. In 1985 the Dutch precedence Programme on Acidification used to be begun that allows you to supply a extra concrete shape to the expanding curiosity of policy-makers within the results of pollution on ecosystems specifically. within the final 3 years, the examine has all in favour of acquiring a extra exact estimate of the emission of ammonia at the deposition of SOx, NOy and NHx, and likewise on quantifying results on wooded area and heathland ecosystems. This quantification of results integrated experimental paintings version analyses, and derivation of severe so much and degrees for wooded area and heathland ecosystems. in addition, situation analyses have been made with the Dutch Acidification platforms version (DAS) so that it will review the effectiveness of coverage measures. The learn itself, which shaped the foundation for this ebook, has been defined within the studies on person initiatives. A precis of the medical effects and conclusions is given in thematic experiences (added as annex).
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Additional info for Acidification Research in The Netherlands: Final Report of the Dutch Priority Programme on Acidification
1988 Summary report; Acidification research 1984 - 1988, Report nr. 00-06 - 37 - 2. 1 The importance of ammonia emissionsin the Netherlands in relation to acidification Initially, when it became evident that the environment is affected by the deposition of acidic compounds, the acidification was related to sulphur compounds. Later on it was established that also compounds originating from nitrogen oxides contribute to acid deposition. During the eighties it became clear that deposition of atmospheric ammonia and ammonium causes acidification, through nitrification in the soil.
The frrst phase of the research programme (1985 - 1988) aimed to answer the following questions: - Which substances are responsible for the damage and to what extent? - How is the damage inflicted? - What will be the effectiveness of abatement measures? To a certain extent these questions have been answered for the Dutch situation in the evaluation reprt of the fmt phase (Schneider and Bresser, 1988). Based on an interim evaluation performed in 1987, the Steering Committee for the programme decided to start a second phase of the research programme, which was carried out during the period 1988 - 1991.
On account of the stochastic nature of the occurrence of - 20 - heather beetle plagues, the results of 100 simulations were averaged for the CALLUNA model. This average was used to interpret the effects of the three scenarios for each area. The results of the calculations lead to the conclusion that Scenario 1 does not offer any prospects for the continued existence of the typical dry heathland vegetations that were still found at the beginning of this century. Scenario 3 offers good prospects for such vegetations.
Acidification Research in The Netherlands: Final Report of the Dutch Priority Programme on Acidification by G. J. Heij, T. Schneider