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Epipelic Diatoms to Determine Ecological Status Based on Diatom Index in Mangrove Ecosystem of Morosari Village, Indonesia

Hasrini Dian Aghnaita, Soeprobowati Tri Retnaningsih, Jumari Jumari

Journal of Ecological Engineering

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2023

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Vol. 24, nr 11

30--43

EN

The mangrove ecosystem of Morosari Village, located in Sayung District, Demak Regency, Central Java, Indonesia, frequent experienced water pollution problems such as tidal flooding, abrasion and pollution due to anthropogenic activities. These problems can lead to further deterioration of water quality. This study aims to use epipelic diatoms to determine the ecological status of waters based on the diatom index in the coastal waters of Morosari Village, Central Java, Indonesia. Sampling was conducted at 3 sampling locations in July-December 2022. Samples from three stations were analyzed based on the diatom index using OMNIDIA software version 6.1.5 and RStudio Software for water quality. Four diatom water quality indices (IBD, IPS, IDG, and TDI index) were obtained percentage value of more than 70% of diatom species. The results of the analysis showed varied ecological status and water quality. Station 1 ranges from 10.9 to 5.2 which is categorized meso-eutrophic to eutrophic in terms of diatom species that dominate Fallacia pygmaea and Nitzschia clausii, Station 2 ranges from 14.3 to 6.9 which is categorized mesotrophic to eutrophic in terms of species Diatoma vulgaris and Thalassiosira pseudonana, and Station 3 ranges from 13.9 to 3.5 with diatom species dominating Cocconeis placentula and Nitzschia palea.

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Comparative Performance of Physicochemical and Diatom-Based Metrics in Assessing the Water Quality of Mert Stream, Turkey

Maraşlıoğlu Faruk, Bektaş Serdar, Özen Arda

Journal of Ecological Engineering

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2020

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Vol. 21, nr 8

18--31

EN

In this study, the authors aimed to compare the performance of the physicochemical-based water quality metrics (WQI, SWQMR) and diatom-based diatom metrics (TDI, BDI, GDI) to evaluate the water quality and ecological status of the Mert Stream. A total of 104 epilithic diatom species, belonging to 44 genera, were recorded during the study period. Navicula was the most dominant diatom in the sites near intensive farming areas, while Gomphonema was the most dominant species in the sites in vicinity of urban and industrial settlements. According to the water quality indices based on the physicochemical parameters and diatoms, the water quality in the upper and middle parts of the Mert stream was better than in the lower parts (higher amount of total suspended solids and higher conductivity). The structure of the epilithic diatom community was mostly shaped by total suspended solids, electrical conductivity and nutrients according to Canonical Correspondence Analysis results. The obtained results revealed that diatom metrics, especially GDI, and water quality metrics, especially WQI, can be used for the monitoring of lotic systems and provide useful complementary information on the ecological status of rivers in medium rainfall regions such as Samsun.

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The use of the Biological Diatom Index (BDI) for the assessment of water quality in the Pilica River, Poland

Szulc B., Szulc K.

Oceanological and Hydrobiological Studies

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2013

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Vol. 42, No. 2

188-194

EN

The main aim of this study was to assess the usefulness of the Biological Diatom Index (BDI) (Lenoir & Coste 1996) for the estimation of water quality in the central section of the Pilica River, located in central Poland in Łódź province. The BDI has never been used before to monitor Polish surface waters. An analysis of the correlations between the values of the BDI and selected physico-chemical parameters was performed, as was an assessment of water quality using the BDI. On the basis of value ranges proposed by Descy and Ector (1996), a good ecological status in the Pilica River was obtained, but this did not correspond with the results achieved from the physico-chemical analysis. This study proposes new value ranges for the BDI. With these new values, the ecological state of the Pilica River changed from good to moderate, which corresponded with the physico-chemical analysis of the water. The new, proposed value ranges for the BDI assess more precisely the quality of water in lowland Polish rivers.

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Benthic diatoms in the central section of the Pilica River and Sulejów Reservoir

Szczepocka E., Szulc B.

Oceanological and Hydrobiological Studies

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2006

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Vol. 35, No.2

171-178

EN

Two primary saprobic indices, SPI – the Specific Pollution sensitivity Index and TDI – the Trophic Diatom Index, were studied. Water quality of the upstream and central sections of the Sulejów reservoir were included in the mesosaprobic zone, while downstream stretches of the reservoir (Smardzewice Village) were in the polysaprobic zone. The Sulejów reservoir was found to impact the Pilica river.