Abundance, Diversity, and Water Quality Assessment of Epilithic Diatoms as Bioindicator in The Dem River, Glothak Waterfall, Wagir District, Malang Regency
DOI:
https://doi.org/10.15408/kauniyah.v19i1.42143Keywords:
Dem river, diversity index, epilithic diatom, glothak waterfallAbstract
The Dem River, originating from the Coban Glothak Waterfall, is an important water source for local communities. However, the rapid growth of tourism in the Coban Glothak area raises concerns regarding potential water pollution. To evaluate the river’s ecological condition, this study analyzed biological, physical, and chemical parameters with a focus on epilithic diatoms as bioindicators. An exploratory design was applied across three representative stations, each subdivided into three sampling points. Biological analysis involved measuring abundance, diversity, and dominance of diatoms using PAST software. Physical and chemical parameters included temperature, pH, total dissolved solids (TDS), dissolved oxygen (DO), biological oxygen demand (BOD), chemical oxygen demand (COD), nitrate (NO₃), and phosphate (PO₄). Results showed that epilithic diatom abundance was relatively high at all stations, but a decreasing trend was observed from station 1 to station 3, reflecting spatial variations in environmental conditions. The diversity index consistently exceeded 1.5, indicating a fairly diverse diatom community and suggesting supportive water conditions for aquatic organisms. Low dominance values at all stations revealed no species over-dominance, reflecting balanced ecological conditions. Furthermore, the physical and chemical measurements aligned with class 2 and 3 water quality standards, confirming that the Dem River remains suitable for sustaining aquatic life with reasonable diversity.
References
Aini, Z., Mulyadi, A., & Amin, B. (2015). Analysis of epipelic diatom composition as a bioindicator of coastal water pollution in Dumai City, Riau Province. Kutubkhanah, 18(1), 7-18. http://dx.doi.org/10.24014/kutubkhanah.v18i1.1469
Azis, A., Nurgayah, W., & Salwiyah. (2020). The relationship between water quality and phytoplankton abundance in the waters of Koeno, South Palangga District, South Konawe Regency. Jurnal Sapa Laut, 5(3), 221-234. http://dx.doi.org/10.33772/jsl.v5i3.13452
Bartram, J., & Ballance, R. (Eds.). (1996). Water quality monitoring: A practical guide to the design and implementation of freshwater quality studies and monitoring programmes. CRC Press.
Castillejo, P., Chamorro, S., Paz, L., Heinrich, C., Carrillo, I., Salazar, J. G., ... & Lobo, E. A. (2018). Response of epilithic diatom communities to environmental gradients along an Ecuadorian Andean river. Comptes Rendus Biologies, 341(4), 256-263. https://doi.org/10.1016/j.crvi.2018.03.008
Fitria, R., & Wulandari, D. (2020). Water quality and biodiversity in river ecosystems: Insights from recent studies in East Java. Aquatic Ecosystem Health & Management, 23(3), 250-263.
Isnaningsih, N. R., & Patria, M. P. (2018). The role of mollusk communities in supporting the function of mangrove areas in Tanjung Lesung, Pandeglang, Banten. Biotropika: Journal of Tropical Biology, 6(2), 35-44. https://doi.org/10.21776/ub.biotropika.2018.006.02.01
Junaedi, R., & Sulistiani, N. (2023). Impact of tourism on water quality and ecosystem health: A case study of Coban Glothak, East Java. Journal of Environmental Management, 309, 114543.
Kurbanov, A., Titova, N., Mustaphaeva, Z., & Atabaeva, N. (2021). The role of macrozoobenthos and periphyton in bioindication of water resources quality in Uzbekistan. In E3S Web of Conferences (Vol. 265, p. 01016). EDP Sciences. https://doi.org/10.1051/e3sconf/202126501016
Kurniawan, D. (2021). Assessment of water quality in Indonesian rivers using diatom bioindicators: A case study of the Brantas River Basin. Water Quality Research Journal, 56(4), 621-631.
Mann, D. G., & Vanormelingen, P. (2013). An overview of the phylum Bacillariophyta (diatoms) in freshwater ecosystems. In J. P. Smol & E. F. Stoermer (Eds.), The diatoms: Applications for the environmental and earth sciences (2nd ed.). Cambridge University Press.
Mirzahasanlou, J. P., Nejadsattari, T., Ramezanpour, Z., Namin, J. I., & Asri, Y. (2018). The epilithic and epipelic diatom flora of the Balikhli River, Northwest Iran. Turkish Journal of Botany, 42(4), 518-532. https://doi.org/10.3906/bot-1711-46
Osborne, A. (2010). Southern Region 4-H2o Ambassador Program. In Kentucky Water Resources Annual Symposium (p. 31).
Prahardika, B. A., & Setyawan, W. M. L. D. (2022). The epilithic diatom community as a bioindicator of water quality in Brangkal Subwatershed in the Mojokerto Area. Jurnal Biodjati, 7(2), 268–279. https://doi.org/10.15575/biodjati.v7i2.20439
Prahardika, B. A., & Styawan, W. M. L. D. (2020). Study of Epilithic Diatom Diversity and Their Potential as Bioindicators of River Water Quality in Coban Tarzan, Malang Regency. Biotropika: Journal of Tropical Biology, 8(2), 116-124. https://doi.org/10.21776/ub.biotropika.2020.008.02.07
Radiarta, I. N., Erlania, & Sugama, K. (2015). Spatial and Temporal Analysis of Phytoplankton Communities Around Integrated Marine Aquaculture in Ekas Bay, West Nusa Tenggara. Jurnal Riset Akuakultur, 10(2), 283–291. http://dx.doi.org/10.15578/jra.10.2.2015.283-291
Rott, E., & Škerlep, M. (2014). Diatom communities in aquatic systems: A review. Hydrobiologia, 721(1), 1-20.
Round, F. E., Crawford, R. M., & Mann, D. G. (1990). The diatoms: Biology and morphology of the genera. Cambridge University Press.
Sari, I. N., & Rahayu, S. (2024). Ecological assessment of river systems using epilithic diatoms: Methods and applications in Indonesia. Hydrobiologia, 851(2), 315-328.
Taylor, J. C., & Cocquyt, C. (2016). Diatoms from the Congo and Zambezi Basins: Methodologies and identification of the genera (Vol. 16). The Belgian Development Cooperation.
Usman, M. S., Kusen, J. D., & Rimper, J. R. T. S. (2013). Plankton Community Structure in the Waters of Bangka Island, North Minahasa Regency.. Jurnal Pesisir dan Laut Tropis, 2(1), 51–57. https://doi.org/10.35800/jplt.1.2.2013.2149
