Phase 2 Lowland Peatland Survey of Wales 2004 onwards

Quality Control

Entire dataset has been extensively validated and verified by NRW vegetation survey specialists. Habitat composition may change over time due to successional trends, land management or even planned developments. A record of a vegetation type or species in the digital data is, therefore, no guarantee that it is still extant on the ground.

Method steps

1. Phase 2 vegetation mapping and collection of quadrat data on plant community composition. Additional information is collected on notable species, environmental factors, condition, management requirements and conservation evaluation. See 'Manual for lowland peatland survey, P. Jones et al., 2007 (in prep.) for more information. Written site accounts are available for each surveyed site. These greatly assist in interpreting the raw data in each case. Characterise and evaluate the vegetation cover of lowland peatlands in Wales based upon a programme of plant (sub-) community level sampling and mapping. All Wales, underpinned by criteria to aid site selection. Surveying is carried out between June and September starting in 2004 and due to finish in 2011.

All Wales coverage although sites vary in size and complexity. The survey programme is almost wholly confined to lowland mires, i.e. those below the upper functional limit of agricultural enclosure. A few mires above this limit may be considered where they display essentially lowland characteristics or where survey would provide additional critical information for rare communities. The survey encompasses all lowland Sites of Special Scientific Interest (SSSI) supporting at least one independently qualifying peatland feature. The only exceptions to this are (i) the largest of the raised mires (namely Cors Fochno, Cors Caron, and Fenns, Whixall, Bettisfield, Wem & Cadney Mosses), and (ii) any sites for which recent reliable information collected in a manner broadly comparable to that of the current survey is already available. Non-statutory sites are included if they have peatland features considered likely to be of individually qualifying status or if they have a notable mire element. A 0.5 ha threshold for individual or groups of communities has been used to help prioritise sites for survey.