This involves identifying and estimating the abundance of emergent, submerged, floating leaved, and free-floating macrophytes that grow in or near the water. The results of these surveys are held in the Standing Waters Database which is available to view on the SNH website. (https://www.nature.scot/information-library-data-and-research/snhi-data-services/standing-waters-database).View the database application here: https://gateway.snh.gov.uk/pls/apex_cagdb2/f?p=111