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All Journal Journal of Marine Resources and Coastal Management
Jayanti, Ucy
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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Assessment of mangrove rehabilitation success at PT Kandelia Alam, Kubu Raya Regency, Indonesia Jayanti, Ucy; Helena, Shifa; Sofiana, Mega Sari Juane; Ihsan, Nur Ramadhani
Journal of Marine Resources and Coastal Management Vol. 7 No. 1 (2026)
Publisher : UIN Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/mrcm.v7i1.2427

Abstract

Mangrove forests provide essential ecological and economic services; however, increasing human activities and natural disturbances have led to widespread degradation, highlighting the need for effective rehabilitation efforts. This study evaluated the success of mangrove rehabilitation in the concession area of PT Kandelia Alam, Kubu Raya Regency, Indonesia, using indicators of survival rate, plant height, leaf number, and environmental conditions. Data were collected under three site conditions (flooded, flowing-water, and unflooded areas) across two observation stations, each consisting of three measurement plots. Each plot measured 20 × 50 m and contained a 20 × 20 m subplot representing 100 individual plants, with observations conducted up to T₀ + 9. The results indicated that rehabilitation success at Stations I and II was moderate, with survival rates of 74.33% and 72.17%, respectively. Average plant heights were 50.60 cm at Station I and 53.66 cm at Station II, with an average of five leaves per individual at both stations. The Rhizophora  mucronata and Bruguiera gymnorrhiza species exhibited better adaptability in flowing-water and unflooded areas, whereas the Rhizophora apiculata species showed lower survival rates, particularly under flooded conditions. Environmental parameters at both stations were generally within suitable ranges for mangrove growth, including salinity of approximately 22 ppt, water temperature of 28°C, water pH of 7, soil temperature of 30–31°C, soil pH of 5.5, and substrates dominated by silty clay and silt. These findings suggest that while survival rates indicate moderate rehabilitation success, vegetative growth remains suboptimal, emphasizing the importance of site–species matching, hydrological suitability, and early-stage maintenance to enhance long-term mangrove rehabilitation outcomes.
Estimation of mangrove sediment carbon storage in Purun Kecil Village, West Kalimantan, Indonesia Helena, Shifa; Minsas, Sukal; Jayanti, Ucy
Journal of Marine Resources and Coastal Management Vol. 7 No. 1 (2026)
Publisher : UIN Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/mrcm.v7i1.2435

Abstract

Mangrove ecosystems play a crucial role as coastal blue-carbon reservoirs, yet widespread land-use conversion has led to substantial degradation and carbon loss in many regions. This study estimates sediment carbon storage in mangrove ecosystems in Purun Kecil Village, Mempawah Regency, West Kalimantan, Indonesia, and identifies sediment factors influencing carbon retention. The research was conducted from June to August 2025, with sediment samples collected at a depth of 0–30 cm across natural mangroves, inactive fishponds, and coconut plantations. Organic carbon was analyzed using the Loss on Ignition (LOI) method, accompanied by measurements of bulk density, soil texture, pH, moisture, and salinity. The results show that natural mangroves stored the highest sediment carbon stock (614.7 Mg C/ha), followed by inactive fishponds (472.0 Mg C/ha) and coconut plantations (392.9 Mg C/ha). One-way ANOVA confirmed significant differences in sediment carbon stocks among land-use types (p < 0.001), and Tukey’s HSD post-hoc analysis indicated that all land-use categories differed significantly. Higher carbon storage in natural mangroves was associated with lower bulk density and finer sediment texture, which promote carbon stabilization under anaerobic conditions. These findings demonstrate that land-use conversion from mangroves to aquaculture and agriculture substantially reduces sediment carbon reserves and degrades soil quality. The study highlights the importance of mangrove conservation and restoration as effective nature-based solutions for climate change mitigation and coastal ecosystem management.
Co-Authors Helena, Shifa Ihsan, Nur Ramadhani Mega Sari Juane Sofiana Minsas, Sukal