Ancient and semi-natural woodland
Ancient semi-natural woodland (ASNW) tends to be richer in plants and animals than other woodland areas. The area of ASNW has declined over the centuries and woodlands have become increasingly fragmented. The figures shown in Table 5.1 are mostly based on maps from the 1990s.
Not National Statistics.
Source: Protected Forest Areas in the UK (S Pryor & G Peterken, 2001), Wales from Woodlands for Wales progress report 2001-05 (2006) and Northern Ireland ancient woodland data from Back on the Map (Woodland Trust, 2007)
1. Ancient woodland is woodland that has been in continuous existence since 1600 (1750 in Scotland);
Semi-natural woodland is woodland with natural characteristics (predominantly native species of trees, ground plants and animals).
2. ASNW (ancient semi-natural woodland) is both ancient and semi-natural;
PAWS (plantation on an ancient woodland site) is ancient but not semi-natural;
OSNW (other semi-natural woodland) is semi-natural but not ancient.