Presence/absence data for vascular plant species in Companhia das Lezírias and their habitat category. First, the most important vegetation units were selected, based on previous land cover maps. In each unit a 1km transect was established, passing trough the centroid of the habitat patch. A 2m margin was established for both sides of the transects and all species within it were registered. Period of field survey has been in May, June and July 2011.

The current distribution of Zostera spp. seagrass meadows along the Bulgarian Black Sea coast was studied. We used a combination of historical and recent observations of the habitat along the studied coastline. Remote sensing data (satellite images, sonar side-scans) was groundtruthed with georeferenced drop camera observations, scuba diving sampling and georeferenced scuba diving photo and video transects.