Khalidin Khalidin, Nanda Muhammad Razi, Firdus Firdus, Dea Savira, Istafan Najmi, Mahfud Mahfud, Febry Dermawan, Chitra Octavina, Kasi Marimuthu, Zainal Abidin Muchlisin
The Singkil peat swamp is currently experiencing severe disturbances due to deforesta-tion, forest fires, and land conversion to oil palm plantations. These activities cause significant changes in water quality and aquatic biota, including macrozoobenthos, a crucial component within the aquatic ecosystem food chain. Therefore, this study aims to identify macrozoobenthos species and analyze their diversity, distribution, density, and dominance in the estuary of the Singkil peat swamp. Sampling was conducted from June to August 2023 at seven locations deter-mined based on accessibility and security. Macrozoobenthos were collected using three transects (1 x 1 m), which were set up purposefully to represent each location. Samples above the substrate were taken directly by hand, while those in the sediment were collected using a paralon pipe with a 3 cm diameter at five points in each transect. The sediment was then sieved, and the obtained samples were placed sample bags containing 70% alcohol for preservation and then transported to the laboratory at the Faculty of Marine Affairs and Fisheries, Syiah Kuala University. The results showed that a total of 21 species belonging to three classes, including Gastropoda, Bivalvia, and Malacostraca, were identified. The average diversity index was 1.75, falling into the medium category, with an average dominance index of 0.38 in the low category. The average species richness index was 3.17 in the medium category, while the similarity index ranged from 0 to 66.67% showing the very dissimilar to similar category. The results also showed that Faunus ater was the most abundant, most frequently found, and most widespread species in the Singkil peat swamp estuary. Based on these findings, the diversity of macrozoobenthos in the Singkil peat swamp estuary was in the moderate category with a low level of dominance. Furthermore, Faunus ater was the species with the widest distribution and highest density. © 2026, Universidad Nacional Autonoma de Mexico. All rights reserved.
Master’s Program in Integrated Coastal Resource Management, Graduate School, Universitas Syiah Kuala, Banda Aceh, Indonesia; Doctoral Program in Mathematics and Applied Sciences, Graduate School, Universitas Syiah Kuala, Banda Aceh, Indonesia; Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh, Indonesia; Department of Marine Science, Faculty of Marine and Fisheries, Universitas Syiah Kuala, Banda Aceh, Indonesia; Department of Environmental Sciences, Tezpur University, Assam, Tezpur, India; Department of Aquaculture, Faculty of Marine and Fisheries, Universitas Syiah Kuala, Banda Aceh, Indonesia
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