A preliminary classification of lake types in Northern Ireland

The EC Water Framework Directive (WFD) introduces the concept of theecological status of surface waters. In order to compare the ecologicalstatus of, for example, lakes across Europe, methods based on either theidea of the continuum or of discrete biological communities need to bedeveloped. The best example of the use of the continuum approach is thatof RIVPACS for macroinvertebrates in rivers (Wright et al. 1998, 2000),and for discrete communities that of Johnson & Goedkoop (2000) for lakemacroinvertebrates