Organic Matter in the Sediment of Mangrove Ecosystem Substrates at Tireman Village, Rembang, Central Java
DOI:
https://doi.org/10.61741/JMBI.2026.v4.p42-48Keywords:
organic matter; substrate, mangrove density, RembangAbstract
Organic matter is a crucial component of mangrove substrates, determining the physical, chemical, and biological properties of sediments while significantly influencing land productivity. This study aimed to determine substrate organic matter content and mangrove density in Tireman Village, Rembang Regency, Central Java, an area surrounded by dense residential settlements. Sampling was conducted across three distinct stations. Substrate samples were collected using sediment cores at depths of 0–10 cm and 10–30 cm, and organic matter analysis was performed using the Loss on Ignition (LOI) method at 550°C. Concurrently, vegetation observations were carried out using 10 × 10 m plots. To assess the overarching ecological conditions of the habitat, key environmental parameters—specifically temperature, pH, and salinity—were also measured. The results indicated that the organic matter content in the substrate fell into the low to moderate categories. The highest organic matter value was recorded at Station I (10.95%), followed by Station III (9.19%), while the lowest value was found at Station II (6.82%). Ultimately, a positive correlation trend was observed between mangrove vegetation density and sediment organic matter content. Stations characterized by a higher vegetation density (reaching up to 6,000 ind/ha) consistently exhibited greater organic matter content in their substrates. This trend highlights the critical role of dense mangrove stands in contributing organic litter to the sediment, thereby enhancing the overall nutrient profile and productivity of the coastal ecosystem despite the pressures of surrounding human settlements
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Data Availability Statement
The data use is merely taken by authors which conducted during Oct – Nov 2025. This is part of student dissertation hence the second and third authors were actively involved in this study.
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