ANALISIS BIOMASSA MANGROVE DAN INDEKS NILAI PENTING DI DESA RATATOTOK TIMUR KABUPATEN MINAHASA TENGGARA PROVINSI SULAWESI UTARA

Abstract

Mangrove forest is an ecosystem that lives in coastal areas and has muddy substrates and river mouths influenced by seawater and it is able to live in areas with high salinity ranges. Mangroves absorb CO2 during photosynthesis, then convert it into carbohydrates by storing it in biomass in, roots, and leaves. This study aimed to identify mangrove species, examine the structure of the mangrove community, analyze the importance value index, and determine the value of mangrove biomass in East Ratatotok Village, Southeast Minahasa Regency, North Sulawesi Province. The method used in this study is the quadrant line transect method which examines the importance value index and the amount of biomass in mangroves using a mangrove biomass determination algorithm. Based on the results of this study, four types of mangroves were found, namely Rhizophora mucronata, Rhizophora apiculate, Ceriops tagal, and Sonneratia alba. The type of R. mucronata dominates the mangrove species in East Ratatotok, Southeast Minahasa Regency. The analysis results of East Ratatotok mangrove biomass values are quite high, ranging from 113.15 to 239.03 tons/ha.

Keywords: Mangrove, IVI, Biomass, East Ratatotok