FRA 2000: A concept and strategy for ecological zoning for the global Forest Resources Assessment 2000
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A global ecological zoning (EZ) map is needed for carrying out the "Global Forest Resources Assessment 2000" (FRA 2000) presently being facilitated by the United Nations Food and Agriculture Organization. The underlying strategy for FRA’s ecological zoning closely reflects both the thematic and technical requirements of the map, and the many operational constraints for implementation. Characteristics and components of the FAO EZ classification include the use of the Köppen system (1931) as a bas is for the delineation of zones. Details of the Köppen system, along with comparisons to other global-level ecological schemes demonstrate the rationale behind the FRA approach (Table 1). The mapping work will be carried out principally using regional or national "potential vegetation" maps to define boundaries of ecological zones at the global level. Although using a variety of map inputs inevitably provokes methodological problems such as edge matching across adjacent maps, a protocol for co rrecting such problems was successfully developed and implemented during a pilot study. The results of the North America Pilot Study illustrate the overall concept, methods, and utility of the map in an operational context (Annex A).