Revealing Microplastic Contamination in Mangrove Sediments from Setiu Wetlands, Malaysia

Nur Syafiqah Mohd Maulana; Muhammad Shiddiq Zulkifli; Aina Arifah Khalid; Rohani Shahrudin; Sabiqah Tuan Anuar; Maisarah Jaafar; Effi Helmy Ariffin

doi:10.22146/ijc.100813

Revealing Microplastic Contamination in Mangrove Sediments from Setiu Wetlands, Malaysia

https://doi.org/10.22146/ijc.100813

Nur Syafiqah Mohd Maulana⁽¹⁾, Muhammad Shiddiq Zulkifli⁽²⁾, Aina Arifah Khalid⁽³⁾, Rohani Shahrudin⁽⁴⁾, Sabiqah Tuan Anuar⁽⁵⁾, Maisarah Jaafar^(6*), Effi Helmy Ariffin⁽⁷⁾

(1) Microplastics Research Interest Group (MRIG), Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Malaysia
(2) Microplastics Research Interest Group (MRIG), Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Malaysia
(3) Microplastics Research Interest Group (MRIG), Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Malaysia
(4) Microplastics Research Interest Group (MRIG), Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Malaysia
(5) Microplastics Research Interest Group (MRIG), Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Malaysia
(6) Microplastics Research Interest Group (MRIG), Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Malaysia
(7) Institute of Oceanography and Environment (INOS), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Malaysia
(*) Corresponding Author

Abstract

Mangrove ecosystems are vital for biodiversity conservation and coastal protection, serving as significant sinks for microplastics by trapping debris from both land and marine sources. This study investigates microplastic contamination in the mangrove sediments of Setiu Wetlands, Terengganu, a biodiversity hotspot with a unique landscape. Results revealed a concerning abundance of 2292 microplastic particles/kg of dry-weight sediment, with a high proportion of small-sized microplastics (< 1 mm). Areas influenced by aquacultural activities displayed the highest abundance, highlighting the connection between human activities and contamination levels. Over 80% of the microplastics were fibers, primarily transparent and black, with surface analysis revealing signs of environmental degradation, including cracks and pits. These surface modifications may facilitate biofilm growth and metal binding, potentially increasing their toxicity. Polypropylene was the most common polymer detected, linking contamination to the breakdown of packaging materials, fishing nets, and ropes. A significant inverse correlation was found between sediment pH and microplastic abundance, while no relationship was observed with organic matter content. These findings highlight the alarming presence of microplastics in mangrove ecosystems, stressing the need for urgent action in waste management, plastic reduction, and further investigation into the ecological consequences of this pervasive threat.

Keywords

microplastics; mangrove sediment; Rhizophora; Setiu Wetlands; South China Sea

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References

[1] Viet Dung, L., Huu Duc, T., Thi Khanh Linh, L., Thi Dieu Ly, T., Anh Duong, H., and Thi My Hao, N., 2021, Depth profiles of microplastics in sediment cores from two mangrove forests in Northern Vietnam, J. Mar. Sci. Eng., 9 (12), 1381.

[2] Huang, Y., Xiao, X., Effiong, K., Xu, C., Su, Z., Hu, J., Jiao, S., and Holmer, M., 2021, New insights into the microplastic enrichment in the blue carbon ecosystem: evidence from seagrass meadows and mangrove forests in coastal South China Sea, Environ. Sci. Technol., 55 (8), 4804–4812.

[3] Martin, C., Almahasheer, H., and Duarte, C.M., 2019, Mangrove forests as traps for marine litter, Environ. Pollut., 247, 499–508.

[4] Wang, Y., Zhao, J., Fu, Z., Guan, D., Zhang, D., Zhang, H., Zhang, Q., Xie, J., Sun, Y., and Wang, D., 2024, Innovative overview of the occurrence, aging characteristics, and ecological toxicity of microplastics in environmental media, Environ. Pollut., 346, 123623.

[5] Kanhai, L.D.K., Johansson, C., Frias, J.P.G.L., Gardfeldt, K., Thompson, R.C., and O’Connor, I., 2019, Deep Sea sediments of the Arctic Central Basin: A potential sink for microplastics, Deep Sea Res., Part I, 145, 137–142.

[6] Banaei, M., Forouzanfar, M., and Jafarinia, M., 2022, Toxic effects of polyethylene microplastics on transcriptional changes, biochemical response, and oxidative stress in common carp (Cyprinus carpio), Comp. Biochem. Physiol., Part C: Toxicol. Pharmacol., 261, 109423.

[7] Hongsawat, P., Thinjong, W., Chouychai, B., Punyapalakul, P., and Prarat, P., 2024, Microplastics in retail shellfish from a seafood market in eastern Thailand: Occurrence and risks to human food safety, Mar. Pollut. Bull., 201, 116228.

[8] Hamdan, O., 2024, Status of Mangroves in Malaysia, Forest Research Institute Malaysia (FRIM), Malaysia.

[9] van Bijsterveldt, C.E.J., van Wesenbeeck, B.K., Ramadhani, S., Raven, O.V., van Gool, F.E., Pribadi, R., and Bouma, T.J., 2021, Does plastic waste kill mangroves? A field experiment to assess the impact of macro plastics on mangrove growth, stress response and survival, Sci. Total Environ., 756, 143826.

[10] Ouyang, X., Duarte, C.M., Cheung, S.G., Tam, N.F.Y., Cannicci, S., Martin, C., Lo, H.S., and Lee, S.Y., 2022, Fate and effects of macro- and microplastics in coastal wetlands, Environ. Sci. Technol., 56 (4), 2386–2397.

[11] Jiao, M., Ren, L., Wang, Y., Ding, C., Li, T., Cao, S., Li, R., and Wang, Y., 2022, Mangrove forest: An important coastal ecosystem to intercept river microplastics, Environ. Res., 210, 112939.

[12] Duan, J., Han, J., Cheung, S.G., Chong, R.K.Y., Lo, C.M., Lee, F.W.F., Xu, S.J.L., Yang, Y., Tam, N.F., and Zhou, H.C., 2021, How mangrove plants affect microplastic distribution in sediments of coastal wetlands: Case study in Shenzhen Bay, South China, Sci. Total Environ., 767, 144695.

[13] Chaisanguansuk, P., Phantuwongraj, S., Jirapinyakul, A., and Assawincharoenkij, T., 2023, Preliminary study on microplastic abundance in mangrove sediment cores at Mae Klong River, upper Gulf of Thailand, Front. Environ. Sci., 11, 1134988.

[14] Martin, C., Baalkhuyur, F., Valluzzi, L., Saderne, V., Cusack, M., Almahasheer, H., Krishnakumar, P.K., Rabaoui, L., Qurban, M., Arias-Ortiz, A., Masqué, P., and Duarte, C.M., 2020, Exponential increase of plastic burial in mangrove sediments as a major plastic sink, Sci. Adv., 6 (44), eaaz5593.

[15] Zhang, L., Zhang, S., Guo, J., Yu, K., Wang, Y., and Li, R., 2020, Dynamic distribution of microplastics in mangrove sediments in Beibu Gulf, South China: Implications of tidal current velocity and tidal range, J. Hazard. Mater., 399, 122849.

[16] Navarro, C.K.P., Arcadio, C.G.L.A., Similatan, K.M., Inocente, S.A.T., Banda, M.H.T., Capangpangan, R.Y., Torres, A.G., and Bacosa, H.P., 2022, Unraveling microplastic pollution in mangrove sediments of Butuan Bay, Philippines, Sustainability, 14 (21), 14469.

[17] Zhou, Q., Tu, C., Fu, C., Li, Y., Zhang, H., Xiong, K., Zhao, X., Li, L., Waniek, J.J., and Luo, Y., 2020, Characteristics and distribution of microplastics in the coastal mangrove sediments of China, Sci. Total Environ., 703, 134807.

[18] Yu, H., Qi, W., Cao, X., Hu, J., Li, Y., Peng, J., Hu, C., and Qu, J., 2021, Microplastic residues in wetland ecosystems: Do they truly threaten the plant-microbe-soil system?, Environ. Intern., 156, 106708.

[19] Qiao, K., and Wang, W.X., 2024, The dual role of coastal mangroves: Sinks and sources of microplastics in rapidly urbanizing areas, J. Hazard. Mater., 480, 136408.

[20] Dai, Z., Zhang, N., Ma, X., Wang, F., Peng, J., Yang, S., and Cao, W., 2024, Microplastics strengthen nitrogen retention by intensifying nitrogen limitation in mangrove ecosystem sediments, Environ. Int., 185, 108546.

[21] Mendes, D.S., Beasley, C.R., Silva, D.N.N., and Fernandes, M.E.B., 2023, Microplastic in mangroves: A worldwide review of contamination in biotic and abiotic matrices, Mar. Pollut. Bull., 195, 115552.

[22] Abd Rahim, N.H., Cannicci, S., Ibrahim, Y.S., Not, C., Idris, I., Mohd Jani, J., Dahdouh-Guebas, F., and Satyanarayana, B., 2023, Commercially important mangrove crabs are more susceptible to microplastic contamination than other brachyuran species, Sci. Total Environ., 903, 166271.

[23] Mohd Ali, A.A., Khalid, A.A., Abd Razak, N.I., Mohd Maulana, N.S., Roslan, N.S., Razmi, R.S.B., Wan Ruseli, W.M.A., Ibrahim, Y.S, Jaafar., M., Shahrudin, R., Ismail., K., and Tuan Anuar, S., 2024, A review on the presence of microplastics in environmental matrices within Southeast Asia: elucidating risk information through an analysis of microplastic characteristics such as size, shape, and type, Water Emerging Contam. Nanoplast., 3 (2), 12.

[24] Mohd Salim, J., Lee, G.E., Salam, M.R., Shahimi, S., Pesiu, E., Jani, J.M., Horsali, N.A.I., Shahrudin, R., Muhammad Nor, S.M., Chong, C.J., Mohamad, F., Raffi, A., and Nikong, D., 2020, A checklist of vascular plants and uses of some species for livelihood-making in Setiu Wetlands, Terengganu, Malaysia, PhytoKeys, 160, 7-43.

[25] Sahari, M.S.I., Mohd Razali, N.A., Redzuan, N.S., Md Shah, A., Awang, N.A., Lee, L.H., Juahir, H., and Muhammad Nor, S.M., 2024, Carbon stock variability of Setiu Lagoon mangroves and its relation to the environmental parameters, Global Ecol. Conserv., 53, e02994.

[26] Ibrahim, Y.S., Hamzah, S.R., Wan Mohd Khalik, W.M.A., Ku Yusof, K.M.K., and Tuan Anuar, S., 2021, Spatiotemporal microplastic occurrence study of Setiu Wetlands, South China Sea, Sci. Total Environ., 788, 147809.

[27] The NOAA Marine Debris Program, 2023, 2023 Marine Debris Program Accomplishments Report, http://marinedebris.noaa.gov/accomplishments-reports-and-strategic-plans/marine-debris-program-accomplishments-report.

[28] IOC Sub-Commission for the Western Pacific, 2018, Second WESTPAC Workshop on Distribution, Source, Fate and Impacts of Marine Microplastics in Asia and the Pacific, Program Book, https://ioc-westpac.org/wp-content/uploads/2023/10/Second-workshop-schedule-2018.pdf.

[29] Khalid, A.A., Abd Razak, N.I., Tuan Anuar, S., Ibrahim, Y.S., Rusli, M.U., and Jaafar, M., 2025, Microplastics contamination in natural sea turtle nests at Redang Island, Malaysia, Mar. Pollut. Bull., 211, 117412.

[30] Jung, M.R., Horgen, F.D., Orski, S.V., Rodriguez, V.C., Beers, K.L., Balazs, G.H., Jones, T.T., Work, T.M., Brignac, K.C., Royer, S.J., Hyrenbach, K.D., Jensen, B.A., and Lynch, J.M., 2018, Validation of ATR FT-IR to identify polymers of plastic marine debris, including those ingested by marine organisms, Mar. Pollut. Bull., 127, 704–716.

[31] Kadhum, S.A., Ishak, M.Y., and Zulkifli, S.Z., 2017, Estimation and influence of physicochemical properties and chemical fractions of surface sediment on the bioaccessibility of Cd and Hg contaminant in Langat River, Malaysia, Environ. Geochem. Health, 39 (5), 1145–1158.

[32] Lin, L., Chen, C.C., Zhu, X., Pan, K., and Xu, X., 2022, Risk of aquaculture-derived microplastics in aquaculture areas: An overlooked issue or a non-issue?, Front. Mar. Sci., 9, 923471.

[33] Liu, X., Liu, H., Chen, L., and Wang, X., 2022, Ecological interception effect of mangroves on microplastics, J. Hazard. Mater., 423, 127231.

[34] Lenaker, P.L., Baldwin, A.K., Corsi, S.R., Mason, S.A., Reneau, P.C., and Scott, J.W., 2019, Vertical distribution of microplastics in the water column and surficial sediment from the Milwaukee River Basin to Lake Michigan, Environ. Sci. Technol., 53 (21), 12227–12237.

[35] Jadhav, E.B., Sankhla, M.S., Bhat, R.A., and Bhagat, D.S., 2021, Microplastics from food packaging: An overview of human consumption, health threats, and alternative solutions, Environ. Nanotechnol., Monit. Manage., 16, 100608.

[36] Li, R., Yu, L., Chai, M., Wu, H., and Zhu, X., 2020, The distribution, characteristics and ecological risks of microplastics in the mangroves of Southern China, Sci. Total Environ., 708, 135025.

[37] Raquez, J.M., Bourgeois, A., Jacobs, H., Degée, P., Alexandre, M., and Dubois, P., 2011, Oxidative degradations of oxodegradable LDPE enhanced with thermoplastic pea starch: Thermo‐mechanical properties, morphology, and UV‐ageing studies, J. Appl. Polym. Sci., 122 (1), 489–496.

[38] Ibrahim, Y.S., Azmi, A.A., Abdul Shukor, S., Tuan Anuar, S., and Abdullah, S.A., 2016, Microplastics ingestion by Scapharca cornea at Setiu Wetlands, Terengganu, Malaysia, Middle-East J. Sci. Res., 24 (6), 2129–2136.

[39] Ibrahim, Y.S., Rathnam, R., Tuan Anuar, S., and Wan Mohd Khalik, W.M.A., 2017, Isolation and Characterisation of microplastic abundance in Lates calcarifer from Setiu Wetlands, Malaysia, Malays. J. Anal. Sci., 21 (5), 1054–1064.

[40] Mohamed Nor, N.H., and Obbard, J.P., 2014, Microplastics in Singapore’s coastal mangrove ecosystems, Mar. Pollut. Bull., 79 (1-2), 278–283.

[41] Barasarathi, J., Agamuthu, P., Emenike, C.U., and Fauziah, S.H., 2014, Microplastic Abundance in Selected Mangrove Forest in Malaysia, Proceeding of the ASEAN Conference on Science and Technology 2014, Bogor, Indonesia, August 18–20, 2014.

[42] Cordova, M.R., Ulumuddin, Y.I., Lubis, A.A., Kaisupy, M.T., Wibowo, S.P.A., Subandi, R., Yogaswara, D., Purbonegoro, T., Renyaan, J., Nurdiansah, D., Sugiharto, U., Shintianata, D., Meiliastri, S.S., Andini, F.P., Suratno, S., Ilman, M., Anggoro, A.W., Basir, B., and Cragg, S.M., 2023, Microplastics leaving a trace in mangrove sediments ever since they were first manufactured: A study from Indonesia mangroves, Mar. Pollut. Bull., 195, 115517.

[43] Mohamed, C.A.R., Shahruddin, A.N., Pradit, S., Loh, P.S., Nitiratsuwan, T., Kobkeatthawin, T., Noppradit, P., Le, T.P.Q., Oeurng, C., Sok, T., Lee, C.W., Bong, C.W., Lu, X., Anshari, G.Z., Kandasamy, S., and Wang, J., 2023, Depth Profiles of Microplastic in Sediment Cores in the Mangrove Area of Kuala Gula Mangrove, Malaysia, J. Mar. Sci. Eng., 11 (6), 1223.

[44] Prarat, P., Hongsawat, P., and Chouychai, B., 2024, Microplastic occurrence in surface sediments from coastal mangroves in Eastern Thailand: Abundance, characteristics, and ecological risk implications, Reg. Stud. Mar. Sci., 71, 103389.

[45] Linh, L.T.K., Duong, H.A., Duc, T.H., Tue, N.T., and Dung, L.V., 2022, Contamination of microplastics in mangrove sediment cores from Lach Huyen area, Hai Phong city, Vietnam, IOP Conf. Ser.: Earth Environ. Sci., 1226, 012005.

[46] Ma, J., Niu, X., Zhang, D., Lu, L., Ye, X., Deng, W., Li, Y., and Lin, Z., 2020, High levels of microplastic pollution in aquaculture water of fish ponds in the Pearl River Estuary of Guangzhou, China, Sci. Total Environ., 744, 140679.

[47] Deng, J., Guo, P., Zhang, X., Su, H., Zhang, Y., Wu, Y., and Li, Y., 2020, Microplastics and accumulated heavy metals in restored mangrove wetland surface sediments at Jinjiang Estuary (Fujian, China), Mar. Pollut. Bull., 159, 111482.

[48] Ku Yusof, K.M.K., Tuan Anuar, S., Mohamad, Y., Jaafar, M., Mohamad, N., Bachok, Z., Mohamad, N., and Ibrahim, Y.S., 2023, First evidence of microplastic pollution in the surface water of Malaysian Marine Park islands, South China Sea during COVID-19, Mar. Pollut. Bull., 194, 115268.

[49] Raheman, N.Y., Mohd Nordin, R., Abdullah, M., and Hassim, M.F.N., 2020, Association between root complexity of Rhizophora apiculata and sedimentation at Pantai Kelanang, Selangor, Malays. Appl. Biol., 49 (4), 141–148.

DOI: https://doi.org/10.22146/ijc.100813