Species diversity and total carbon inventory in mangrove forests of Teluk Kimi District, Nabire Regency

Teluk Kimi District, a coastal location in Nabire Regency with a mangrove forest, has degraded due to many destructive activities. The study seeks fundamental data on species diversity (H', richness, E) and carbon stock potential. Basic random sampling is used. Square plots are used for sampling, with a 10 m × 10 m plot for tree observation, a 5 m × 5 m plot for saplings, and a 2 m × 2 m plot for seedlings, litter, and soil. Carbon stocks are assessed using allometric equations for biomass and destructive sampling for understorey, litter, necromass, and soil. The Taman Wisata Alam (TWA) Nabire species richness was 1.62 and 18. Pantai Pelangi has a 2.11 H’ value and 17 richness. Muara Air Mandidi has a 1.15 H' value and 8 richness. TWA Nabire and Pantai Pelangi have moderate to high biodiversity and balanced species richness. Monodominance is shown in Muara Air Mandidi’s low species richness and H' value. Pantai Pelangi has a community structure with an evenness above 0.6. TWA Nabire’s uniformity approaches ecological stability. Muara Air Mandidi is moderately uneven and dominated by Rhizophora mucronata. TWA Nabire, Pantai Pelangi, and Muara Air Mandidi have carbon stocks of 592.46, 383.47, and 331.67 tC/ha. The moderate carbon stock in TWA Nabire (>500 tC/ha) is suitable for blue carbon conservation. Pantai Pelangi and Muara Air Mandidi are low-class coastal transitions and degraded ecosystems. The second implication concerns the eventual location of community-based rehabilitation.