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Journal : REKAYASA

Analisis Kelimpahan dan Keanekaragaman Perifiton di Sekitar Karamba Jaring Apung Sungai Barito Kalimantan Selatan Dharmaji, Dedy; Asmawi, Suhaili; Yunandar, Yunandar; Amalia, Intan
Rekayasa Vol 14, No 3: Desember 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i3.12054

Abstract

Perifiton whose life is attached to the substrate, acts as a provider of nutrients and indicators of fishery water quality. The purpose of this study was to analyze the structure, abundance and diversity of epiphytic and epidendric periphyton in floating net cages and water quality. This research was conducted by purposive sampling in upstream, middle and downstream. The method used is exploratory quantitative, from May and June 2021 with sampling time at the beginning of each month. The main phytoplankton periphyton composition consists of Chlorophyceae and Bacillariophyceae. Chlorophyceae increased from 19 genera at the beginning of the observation to 24 genera, while Bacillariophyceae decreased from 22 to 21 genera. Phytoplankton periphytons that were always present in each observation both at STA-1, STA-2 and STA-3 were Synedra, Diatoma, Tabellaria, Fragillaria, Zygnema, Spirogyra, Mougeotiopsis, Microspora, Chlorodesmis cosmosa and Closterium. Unstable community structure with an abundance of 600 – 1320 cells/liter, uniformity index 0.53 – 0.884, diversity index 1.104 – 1.750 and dominance index 0.14 -0.47 classified as oligotropic. Similar periphyton upstream and midstream, but different downstream. The presence of Synedra in all locations indicates that there has been a decline in water quality due to low dissolved oxygen. Water quality at the site informs that low pH, high ammonia and high organic matter result in low dissolved oxygen.
Dinamika Pasang Surut dan Kualitas Perairan Sungai Tabanio Kabupaten Tanah Laut Kalimantan Selatan Sofarini, Dini; Yunandar, Yunandar; Asmawi, Suhaili; Dharmaji, Deddy; Rahim, Nur Fadhilah; Syahnakri, Erwan; Apriansyah, Farhan
Rekayasa Vol 17, No 3: Desember, 2024
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v17i3.28171

Abstract

The tidal dynamics of water affect not only the layers on the surface of the seas but also the entire water mass. The Tabanio River is a tidal-influenced water area with the highest utilisation level in Tanah Laut. Water quality at the estuaries of Tabanio and Panjaratan River is affected by various human activities, such as fishing, plantations, transportation, and waste disposal. This study aims to compare water quality at high and low tides and test the relationship between tidal changes and fluctuations in water quality parameters in both locations. The data used are the results of measurements on July 3 and July 22, 2024, during high and low tide conditions. The relationship between water quality values and tides was analyzed descriptively, then compared with water quality standards according to Government Regulation of the Republic of Indonesia Number 22 of 2021 class 1 and continued with the ANOVA test. Low tide conditions bring to increase in the parameters of conductivity, current, temperature, pH, salinity, and TDS at all locations, while turbidity is only in the estuary. Tidal conditions influence oxygen deficits in all sites, while nitrite and nitrate tend to increase. TSS parameters exceed quality standards in Panjaratan, while Cu and COD exceed quality standards in Tabanio.