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All Journal Nekton Mestaka: Jurnal Pengabdian Kepada Masyarakat
Juliana Wilmiena Tuahatu
Universitas Pattimura
Agriculture, Biological Sciences & Forestry Humanities Economics, Econometrics & Finance Energy Environmental Science Languange, Linguistic, Communication & Media Mechanical Engineering Social Sciences Other

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Estimation of Mangrove Carbon Standing-stock along the Coast of Kailolo Village, Central Maluku: Implications for Climate Change Mitigation Naflah Dafi Al-Fiyah Ombi; Rahman Rahman; Juliana Wilmiena Tuahatu
Nekton Vol 5 No 2 (2025): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v5i2.1032

Abstract

This study aims to estimate the carbon stock and sequestration potential of the mangrove ecosystem along the Hitapory Coast, Kailolo Village, Central Maluku, as a critical step in supporting climate change mitigation efforts. Data collection was conducted at five stations using the quadrat transect method to measure vegetation density, stem diameter, and identify mangrove species. Biomass analysis was performed using allometric equations appropriate for the dominant species. The results indicate a total carbon stock of 330.74 tons C/ha, comprising 227.19 tons C/ha of above-ground carbon (AGC) and 103.55 tons C/ha of below-ground carbon (BGC). The estimated carbon sequestration, expressed in CO₂ equivalents, was 1,212.72 tons CO₂e/ha, with the dominant contribution from Sonneratia alba at 1,187.50 tons CO₂e/ha, while the lowest contribution was from Rhizophora stylosa at 10.76 tons CO₂e/ha. These findings highlight the significant role of the local mangrove ecosystem as an effective carbon sink. Therefore, the conservation and sustainable management of mangroves are essential to support both national and global carbon emission reduction strategies. Furthermore, the study presents an opportunity to develop policies centered on blue carbon trading as an innovative mechanism for climate change mitigation.
Marine Macro-Debris Pollution on the Coast of Negeri Haruku Village Juliana Wilmiena Tuahatu; Gratia Dolores Manuputty; Marlin Chrisye Wattimena; Fahrul Rozy Fakaubun
Nekton Vol 6 No 1 (2026): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v6i1.1108

Abstract

Marine debris is an environmental issue of both national and global concern, particularly marine macro-debris. This study was conducted to determine the level of marine macro-debris pollution along the coast of Negeri Haruku village. Data were collected at three sites considered representative of the Negeri Haruku coastline. A 100-m shoreline transect was used for data collection and divided into 20 segments, from which five segments were randomly selected for sampling. The Clean Coast Index (CCI) was calculated to assess beach cleanliness, while the Plastic Abundance Index (PAI) was used to measure the proportion of plastic debris relative to the total amount of beach debris. The results showed that plastic debris dominated other debris types at all observation sites. This was reflected in the PAI values, namely 4.82 at the site near the river mouth, indicating high plastic density; 1.51 at Hii Beach, indicating moderate plastic density; and 6.09 at Totu Beach, indicating high plastic density. Totu Beach had the highest CCI value of 22.2, indicating a very dirty condition, while the site near the river mouth had a CCI value of 12.6, indicating a dirty condition. In contrast, Hii Beach was classified as clean, with a CCI value of 3.82. A paradoxical pattern was also observed in this study: even at a site with no apparent human activity, debris density was higher (5.55 ± 0.77 items/m²) than at the other two sites. This suggests that the debris may have originated from other locations and been transported by ocean currents. Based on the Clean Coast Index, only Hii Beach was classified as clean, whereas the site near the river mouth and Totu Beach were classified as dirty.
Edukasi Sampah Laut dan Dampaknya terhadap Kehidupan Organisme Laut bagi Siswa SMP Kristen Rehoboth Milyan Uli Latue; Juliana Wilmiena Tuahatu; Frijona Fabiola Lokollo; Valentine Domaris Saleky; Fahrul Rozy Fakaubun; Ronald Darly Hukubun
Mestaka: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 3 (2026): JUNI 2026
Publisher : Pakis Journal Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58184/mestaka.v5i3.965

Abstract

This Community Service activity aims to improve the understanding of Rehoboth Christian Middle School students in Ambon regarding marine debris, its sources, and its impact on marine organisms through an interactive educational approach. Ambon Bay, as a semi-enclosed body of water, faces a serious problem in the form of accumulated plastic waste, most of which originates from land-based activities. The activity was carried out through a presentation-based socialization, pre-test, discussion, and post-test. The evaluation results showed a significant increase in three main aspects: understanding marine debris, waste sources, and how to reduce it, from 53–63% in the pre-test to 100% in the post-test. The material provided emphasized the local context of Ambon Bay, including waste sources, its ecological impact on biota, and prevention efforts in the school environment. This activity succeeded in raising ecological awareness and encouraging concrete actions such as sorting waste, reducing single-use plastics, and maintaining a clean environment. This program has proven effective in fostering environmental awareness from an early age.
Co-Authors Fahrul Rozy Fakaubun Frijona Fabiola Lokollo Gratia Dolores Manuputty Marlin C Wattimena Milyan Uli Latue Naflah Dafi Al-Fiyah Ombi Ronald Darlly Hukubun Valentine Domaris Saleky