AN APPROACH TO LINKING AN ECOLOGICAL VEGETATION MODEL TO AN AGRICULTURAL ECONOMIC-MODEL

Agricultural policy measures are directed increasingly towards encouraging production systems that are deemed to be favourable for ecologically valued plant communities and species. This paper presents an approach to linking an ecological model of vegetation with a regional economic model of agricultural production to provide a means of estimating the costs of achieving a given area of a desired vegetation type. This is demonstrated by an empirical study of heather and hay meadow conservation in River Tyne catchment in northern England. The results show that policy measures need to take account both of spatial linkages within agriculture and temporal links between ecological processes and agricultural productivity.