Rapid environmental assessment (REA) was undertaken at 137
coastal sites, distributed at 10-km intervals (Fig. 1). Sixty-one
of these were the same sites examined during the 1980s (Price
et al., 1998). Although GPS was not available for the 1980s survey,
site locations were determined (e.g. from landmarks, coastal features)
and recorded on large-scale maps (1: 50,000) to within an
estimated ±500 m of true positions. During the 2010/11 survey