Figure 1

Map of seaweed samples collection location. (01) Ahangama (N 05°58.006' E 080°22.482'), (02). Thalpe (N 05°59.792' E 080°16.898'), (03) Chilaw (N 07°36.220' E 079°47.120'), (04) Negombo (N 07°12.170' E 079°48.570'), (05) Kankasanthurai (N 09°48.592' E 080°02.546'), (06) Point Pedro (N 09°49.501' E 080°15.119') (ArcGIS for Desktop 10.3.1 version was used to create the map—https://www.esri.com/en-us/arcgis/products/arcgis-desktop/overview).