Composition and abundance of macroplastic debris on the coast of Inobonto village, Bolaang Mongondow Regency, North Sulawesi, Indonesia

Yogi J. Anduk; Stephanus V. Mandagi; Ari B. Rondonuwu; Lawrence J.L. Lumingas; John L. Tombokan; Anneke V. Lohoo

doi:10.35800/jasm.v14i1.67209

Authors

Yogi J. Anduk Aquatic Resources Management Study Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Jl. Kampus UNSRAT Bahu, Manado 95115, Indonesia
Stephanus V. Mandagi Aquatic Resources Management Study Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Jl. Kampus UNSRAT Bahu, Manado 95115, Indonesia
Ari B. Rondonuwu Aquatic Resources Management Study Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Jl. Kampus UNSRAT Bahu, Manado 95115, Indonesia
Lawrence J.L. Lumingas Aquatic Resources Management Study Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Jl. Kampus UNSRAT Bahu, Manado 95115, Indonesia
John L. Tombokan Aquatic Resources Management Study Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Jl. Kampus UNSRAT Bahu, Manado 95115, Indonesia
Anneke V. Lohoo Aquatic Resources Management Study Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Jl. Kampus UNSRAT Bahu, Manado 95115, Indonesia

DOI:

https://doi.org/10.35800/jasm.v14i1.67209

Keywords:

macroplastic debris, coastal pollution, plastic polymer composition, bolaang mongondow regency, north sulawesi province

Abstract

Coastal macroplastic pollution is a critical environmental issue, yet localized data, particularly from developing tropical regions, remain scarce. This study investigates the composition, abundance, and spatial distribution of macroplastic debris (>5 mm) on the coast of Inobonto Village, Bolaang Mongondow Regency, North Sulawesi, Indonesia. Sampling was conducted in February 2026 at three distinct coastal zones: an estuarine area (Location A), a residential shoreline (Location B), and a trading area adjacent to a traditional market (Location C). Using a 5 m × 5 m quadrat transect method following NOAA protocols, debris was collected, physically categorized, and classified into polymer types (HDPE, LDPE, PET, PP, PS, PVC, and Others). Statistical differences in abundance among locations were assessed using the Kruskal–Wallis test, followed by post-hoc Mann–Whitney comparisons. The results revealed that polypropylene (PP, 28.06%) and low-density polyethylene (LDPE, 23.72%) were the predominant polymer types across all sites. Total macroplastic abundance varied significantly by location, with the highest density recorded at the trading area (1.168 ± 0.663 items/m²), followed by the estuary (0.544 ± 0.154 items/m²) and the residential area (0.352 ± 0.232 items/m²). Notably, the trading area and estuary exhibited significantly higher debris loads compared to the residential zone (p < 0.05). These findings underscore that market-related activities and estuarine dynamics are primary drivers of macroplastic accumulation in Inobonto's coastal environment. This baseline data is essential for designing targeted, source-based waste reduction strategies and prioritizing coastal clean-up efforts in this region.

References

ALVARADO-ZAMBRANO, D., RIVERA-HERNÁNDEZ, J.R., GREEN-RUIZ, C. (2024) Macroplastic and microparticle pollution in beach sediments from Urias Lagoon, Mexico. Marine Pollution Bulletin 198:115847.

ANGGIA, MARNIATI. (2024) Analisis dampak sampah plastik terhadap kualitas lingkungan pesisir. Jurnal Lingkungan Pesisir 6(2):45–55.

ARWINI, N. (2022) Klasifikasi sampah makroplastik berdasarkan komposisi di wilayah pesisir Indonesia. Jurnal Lingkungan Laut 4(1):12–20.

BASRI, H., PUTRI, A., SARI, N. (2024) Dampak makroplastik terhadap biota laut di perairan Indonesia. Jurnal Kelautan Tropis 27(1):88–99.

BURGESS, H.K. (2021) Marine Debris Shoreline Survey Field Guide. NOAA Marine Debris Program, Silver Spring, MD. 48 p.

CHAPRON, L., PERU, E., ENGLER, A., GHIGLIONE, J.F., MEISTERZHEIM, A.L., PRUSKI, A.M., PURSER, A., VÉTION, G., GALAND, P.E., LARTAUD, F. (2018) Macro- and microplastics affect the energy budget and life history of the deep-sea coral. Scientific Reports 8:15520.

CHANIAGO, E. (2022) Pemantauan sampah laut makro di 23 titik pantai Indonesia. Laporan Teknis KLHK, Jakarta.

DERMAWAN, A., MUJIB, M. (2025) Fungsi ekologis dan ekonomi wilayah pesisir Indonesia. Jurnal Pesisir Laut Tropis 13(1):1–10.

DINNO, A. (2015) Nonparametric pairwise multiple comparisons in independent groups using Dunn's test. Stata Journal 15(1):292–300.

FIBRIANA, F. (2024) Jenis dan karakteristik plastik dalam konteks pencemaran lingkungan. Jurnal Ilmu Lingkungan 22(1):33–41.

FIKRY, M., HASAN, B., YULIANDA, F. (2024) Penanganan sampah laut di Indonesia pasca Perpres No. 83 Tahun 2018. Jurnal Kebijakan Kelautan Indonesia 5(2):105–118.

GHASEMI, A., ZAHEDIASL, S. (2012) Normality tests for statistical analysis: a guide for non-statisticians. International Journal of Endocrinology and Metabolism 10(2):486–489.

JAMBECK, J.R., GEYER, R., WILCOX, C., SIEGLER, T.R., PERRYMAN, M., ANDRADY, A., NARAYAN, R., LAW, K.L. (2015) Plastic waste inputs from land into the ocean. Science 347(6223):768–771.

KHOIRIYAH, A. (2021) Pengertian dan klasifikasi sampah berdasarkan karakteristik fisik dan kimia. Jurnal Kesehatan Lingkungan 13(1):44–50.

KOSWARA, A. (2025) Estimasi timbulan sampah nasional 2025: tinjauan SIPSN-KLHK. Jurnal Pengelolaan Lingkungan 7(1):15–25.

KURNIAWAN, A., PRATAMA, I., NASUTION, M. (2025) Sampah plastik sebagai ancaman global: tinjauan komprehensif. Jurnal Lingkungan Hidup 8(1):1–12.

LEBRETON, L.C.M., VAN DER ZWET, J., DAMSTEEG, J.W., SLAT, B., ANDRADY, A., REISSER, J. (2017) River plastic emissions to the world's oceans. Nature Communications 8:15611.

LIKU, H., KAMBU, A., RUMAHORBO, B. (2021) Pencemaran air dan dampaknya terhadap ekosistem perairan. Jurnal Ilmu Kelautan Kepulauan 4(2):80–90.

NAIDOO, T., SMIT, A.J., GLASSOM, D. (2020) Plastic ingestion by estuarine fish—a review. Marine Pollution Bulletin 150:110719.

OPFER, S., ARTHUR, C., LIPPIATT, S. (2012) NOAA Marine Debris Shoreline Survey Field Guide. NOAA Marine Debris Program, Silver Spring, MD.

PRATIWI, D., ABDULLAH, S. (2024) Akumulasi sampah plastik di kawasan pesisir akibat pengaruh arus dan pasang surut. Jurnal Oseanografi 13(3):200–212.

PRIADANA, S., SUNARSI, D. (2021) Metode Penelitian Kuantitatif. Unpam Press, Tangerang. 224 pp.

RAMADHAN, F., HIDAYAT, R., SANTOSO, B. (2025) Jenis dan sumber sampah makroplastik di kawasan pesisir Indonesia. Jurnal Perikanan dan Kelautan 10(1):34–45.

SIMBOLON, A., WIJAYA, N., PRATAMA, S. (2025) Dampak sampah plastik terhadap kualitas ekosistem pesisir. Jurnal Biologi Tropis 25(1):10–22.

SIMARANGKIR, M., IRFAN, S., NASUTION, F. (2024) Perubahan pola konsumsi masyarakat modern dan implikasinya terhadap produksi sampah. Jurnal Ilmu Sosial dan Humaniora 16(2):123–134.

SINURAY, R., KURNIA, A., HUTOMO, B. (2024) Fenomena upwelling dan perannya dalam distribusi sampah laut. Jurnal Oseanografi Indonesia 9(1):55–65.

SITUMORANG, A., AMALIA, R. (2024) Pencemaran lingkungan: konsep, jenis, dan dampaknya. Jurnal Pendidikan Biologi 14(1):1–10.

SUPIT, R.F., RUMENGAN, A., WANTASEN, A. (2022) Kepadatan makroplastik di Perairan Pantai Manado, Sulawesi Utara. Jurnal Ilmiah Platax 10(2):91–100.

UTAMI, N., FITRIA NINGRUM, S. (2020) Karakteristik plastik sebagai limbah anorganik. Jurnal Teknik Lingkungan 6(1):22–30.

WIJDANISA, W., PRIYONO, B., SARI, D. (2025) Sumber dan distribusi makroplastik di kawasan muara sungai dan pesisir pantai. Jurnal Pengelolaan Pesisir 4(1):77–88.

YANI, M. (2021) Durasi degradasi plastik di lingkungan dan implikasinya bagi pengelolaan sampah. Jurnal Teknik Lingkungan 7(2):45–54.

YURISTIN, A. (2021) Definisi dan klasifikasi sampah berdasarkan asal usul dan jenisnya. Jurnal Kebijakan Lingkungan 3(1):5–12.

ZURAIDAH, E., AMALIA, R., HASAN, S. (2022) Pengertian sampah dalam perspektif lingkungan hidup. Jurnal Sanitasi Lingkungan 4(2):30–38.