Analysis of Cyanide (CN) in Seagrass as a Bioindicator in Sekotong West Lombok

Seagrass is one of the aquatic plants that can be used as a bioindicator in waters. This research aims to determine morphological structure seagrass bioindicators and amount cyanide content waters Sekotong, West Lombok. was conducted July - August 2021 at Pewaringan Beach, Determination sample point done by purposive sampling. Data were collected using line transect method simple random sampling  three points. analysis carried out on with complete roots, stems, leaves spectrophotometer BLKPK NTB Province. The results showed characteristics locations had slightly muddy sandy substrate muddy, an average leaf length 21.5 cm, width 1.10 stem 9.4 diameter 0.74 root 7.29 0.25 cm. ANOVA test significant value <0.05, so there difference morphology seagrass. Beach found 12,341 mg/kg or 0.495 mg/L. According Ministry Health Republic Indonesia No. 57 2016 standard 0.5 So still within safe limits.