Jord Vand Luft Dyr og planter Grønland Samfund
  Udgivelser Overvågning Om DMU Viden for alle Nyheder
 
In English
  Summary

There is a profound need to include the consideration for biodiversity in the estimate of air pollution effects and in regulating/management of air pollution on as well local as national scale.

The effect of a given air pollution load shall be seen both in relation to the present state of the area and in relation to targets for the area. It has been the purpose of the EUDANA-project to develop or adjust existing tools for calculation of critical loads based on biodiversity targets and threshold values for favourable conservation status for terrestrial nature types protected by The EU Habitat Directive and by The Danish Nature Protection Act.

In the project a model tool has been constructed based on existing soil chemical and plant competition models. Example calculations with the model tool have been made for three types of grassland and for coastal dune heathlands. The test shows that the developed model tool functions well on the technical level.

The model contains a number of limitations where it will be necessary to make a quantitative estimate of the implications hereof for each locality where the model is intended to be used. On local scale the model will be better fitted to carry out risk assessments for different scenarios than to perform specific calculations, e.g. in connection with research projects. An essential element in the model, which demands further development, is the coupling from environmental conditions to Ellenberg values. Especially Ellenberg-N expressing nutrient accessibility can be difficult to translate to a simple, measurable parameter. In the present version of EUDANA a Dutch transfer function between the accessible nitrogen in the soil and Ellenberg-N is used, but this relation should be validated for Danish use or replaced by a relation based on C/N.

It is found that the components included in the EUDANA model tool are sufficiently well validated to allow the use of the model tool for the desired purposes. If the model is to be used outside NERI, a suitable users interface should be developed for the model.

Full report in pdf format (606 KB)
0


Helle Thomsen

01.11.2007


DMU  | dmu@dmu.dk  

Box 358 | Frederiksborgvej 399 | 4000 Roskilde | T: 4630 1200

 CVR: 10859387

 EAN: 5798000867000