Moorland generally refers to open upland landscapes dominated by heather and maintained through human management. It is found above the limit of enclosed agricultural land and below the theoretical climatic tree line at about 600m (the tree line is, however, largely absent in the UK, with woodland having been replaced by moorland at this altitude).
The term moorland can be used to include blanket bog and upland acid grassland, but here we use the term to refer to heathland dry enough to walk over.
