Identification Of The Diversity Of Marine Algae The Coast of The Cumpleng Hamlet In Brengkok Village, Lamongan District

Algae are marine biological resources that are found in many coastal areas and Indonesian waters, one of which is the coast of Dusun Cumpleng. On the coast of Dusun Cumpleng, there are various kinds of marine algae scattered in it. However, until now the species of algae on the coast of Dusun Cumpleng have not been identified. So based on this, a study was conducted with the aim of identifying the diversity of marine algae species on the coast of Dusun Cumpleng. This type of research is quantitative descriptive research with on-site surveys for data collection. Observation and collection of algae is carried out directly at the location with the criteria of a rocky place. Next, identify the type of algae. Algae samples obtained were identified using an algae identification book. Based on research conducted in the waters of the Dusun Cumpleng Coastal Sea, there are 5 species from 4 families. For that is, Eucheuma spinosum from the Solierisceace family, Caulerpa racemosa from the Caulerpaceae family, Halimeda discoides from the Halimedaceae family, Turbinaria ornata, and Sargassum polycystum from the Sargassaceae family. These species are Eucheuma spinosum, Caulerpa racemosa, Halimeda discoides, Turbinaria ornata, and Sargassum polycystum. Based on the results of data analysis obtained. The algae species diversity index on the Dusun Cumpleng coast is 1.51. The index value of the dominance of Algae species on the Dusun Cumpleng coast is 0.2202. Based on the diversity index and dominance index values, the algae species on the coast of Dusun Cumpleng are classified as low