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Agatha Sih Piranti
Fakultas Biologi, Universitas Jenderal Soedirman
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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TINGKAT PENCEMARAN WADUK PENJALIN KECAMATAN PAGUYANGAN KABUPATEN BREBES DITINJAU DARI STRUKTUR KOMUNITAS PLANKTON Octyviana Arum; Agatha Sih Piranti; Christiani Christiani
Scripta Biologica Vol 4, No 1 (2017)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1100.977 KB) | DOI: 10.20884/1.sb.2017.4.1.386

Abstract

Penjalin Reservoir is located in Brebes Regency, Indonesia. Human activity around Penjalin Reservoir, such as irrigation, aquaculture, and sanitation can affect its water’s quality. Plankton can be used as bioindicator since its existence is heavily affected by water physical and chemical factors. Polluted waters can affect diversity and abundance of plankton. The purpose of this research were to determine waters quality of Penjalin Reservoir, to know plankton community structure (abundance, diversity, and domination), and pollution level of each sampling station based on plankton diversity. This research used survey method on 6 sampling stations covering inlet, middle of reservoir, and outlet with 3 replicates and 4 weeks interval. Water quality were analyzed descriptively based on criteria of PP No. 82 Tahun 2001. Abundance and diversity were estimated as Shanon-Wiener index. Domination were estimated as Simpson index. Plankton abundance values varies from 4,970.30 to 12,923.37 ind/l with the most abundant species was Tetraedon minimum. Diversity index (H’) were high with value around 3.28–3.55 and domination index were around 0.04–0.07. These diversity indexes showed that the water quality of Penjalin Reservoir were not polluted.
Struktur Komunitas Mikrofita Sungai Pelus Kabupaten Banyumas Kaitannya dengan Kandungan Nutrien (Nitrat, Orthofosfat dan Silika) Nur Laila Rahayu; Agatha Sih Piranti; Carmudi
Scientific Timeline Vol. 1 No. 2 (2021)
Publisher : UNU Purwokerto

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Abstract

The increase in nutrients (nitrate, orthophosphate, and silica) will affect the microphytes as primary producers in the Pelus River ecosystem. This research aims to study NO3, PO4, Si(OH)4 concentration, the community structure of planktonic and benthic microphytes, and also the correlation between NO3, PO4, Si(OH)4 concentration with the benthic microphytes abundance in the Pelus River. The method used for this research was a survey method. Data were analyzed by calculating the community structure of planktonic and benthic microphytes, while quantitative analysis used indexes. The correlation between nitrate, orthophosphate, and silica concentrations was analyzed by multiple regression. The results showed that the composition of planktonic microphytes consisted of 34 species with an abundance of 41,637 ind.l-1, while benthic microphytes consisted of 54 species with an abundance of 89,908 ind.cm-2. The benthic microphytes community had moderate diversity (H'=1.50-2.58) and no dominant species (C=0.11-0.35). Individuals between species were not evenly distributed in each station (E=0.40-0.44). The correlation between nitrate, orthophosphate, silica concentration with the benthic microphytes abundance was very tight (r=0.999). The determination coefficient R2=0.998 indicated that the benthic microphytes abundance was influenced 99.8% by nutrient concentration. The remaining 0,2% was influenced by other factors such as current velocity and light penetration.
Co-Authors Carmudi Christiani Christiani Nur Laila Rahayu Octyviana Arum