Floristic Composition and Species Richness of Mangrove Ecosystems in Pantai Panjang – Pulau Baai Nature Park, Bengkulu Province, Indonesia
Bengkulu Province is located in a coastal area with numerous mangroves. Pantai Panjang –Pulau Baai Nature Park is one of the mangrove regions in Bengkulu City. This study aims to analyze the floristic composition and species richness of mangrove ecosystems in Pantai Panjang-Pulau Baai Nature Park, Bengkulu City. Three stations with diverse ecological conditions were sampled using the transect lines method. Nested observation plots were made along the transect line with a size of 10mx10m for tree strata, 5mx5m for sapling strata, and 1mx1m for seedling strata.103 plots were established across the three stations to identify species and the number of individual mangrove plants, diameter measurement, soil pH, salinity, and substrate type. The analysis found 1741 mangrove plants from 8 species of true mangrove plants belonging to 6 families. The most common species found was Rhizhopora mucronata which belongs to the Rhizophoraceae family. Casuarina equisetifolia, a species discovered at Station 1, is categorized as a coastal rather than a mangrove plant. The species diversity index (Shannon-Wiener) at the three stations is moderate. The species richness index, however, is low at all three stations. The index of species evenness is high across all three stations, except for the seedling stratum at Station 3, where it is moderate. The study found that the soil pH levels ranged between 5.3 and 6, while the salinity levels ranged from 4.3 to 9.3. The substrate types were identified as muddy and sandy mud.
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