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All Journal Jurnal Sosial Ekonomi Kelautan dan Perikanan Indonesian Journal of Limnology Jurnal Pendidikan IPA Indonesia
Tri Retnaningsih Soeprobowati
Diponegoro University
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Social Sciences

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Determination of Minimum Number of Frustule for Identification of Diatoms in Telaga Cebong, Dieng, Central Java, Indonesia Oki Rachmalia Rozi; Tri Retnaningsih Soeprobowati; Riche Hariyati
Indonesian Journal of Limnology Vol. 3 No. 2 (2022): Indonesian Journal of Limnology
Publisher : Indonesian Society of Limnology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (551.039 KB) | DOI: 10.51264/inajl.v3i2.27

Abstract

Diatoms belong to the division of Bacillariophyta; their cell walls composition of silica (SiO2) was the primary characteristic of their structure. Diatoms are good for water quality assessment and paleolimnological analysis. The determination number of frustule which has to be counted for diatom is one of the critical steps in process identification. Several studies usually use a range starting from 100-600 frustules, which refers to the "fixed count" method, that is time-consuming. Research about the minimum frustules number that is acceptable for water character in Indonesia has been limited studied. This research aim is to determine the minimum number of frustules need to identify the diatom assemblage, especially at Telaga Cebong, Dieng, Central Java, Indonesia. The sediment samples were taken vertically with D’Section corer until a depth of 200 cm sediment samples then  sliced every 10 cm. The labwork activites consisted of  digestion, preparation, enumeration, and identification of diatom species with the numberof frustules of 100,200, 300, 400, 500, and 600. The diatom data are analyzed with the formula for the maximum efficiency value. Based on 19 sediment samples from different sediment layers, the maximum efficiency value obtained was above the range of 0.85 to 0.92. The number of identified species remained stable after a minimum of 300 frustules. Therefore, at least 300 frustules are needed for identification of diatom for paleoreconstructions at Cebong Lake.
Human Ecology and Adaptive Governance in Vulnerable Mangrove Ecosystems: Global Trends and Implications for Indonesia Riesti Triyanti; Tri Retnaningsih Soeprobowati; Sri Sumiyati; Nur Arifatul Ulya
Jurnal Sosial Ekonomi Kelautan dan Perikanan Vol 21, No 1 (2026): JUNI 2026
Publisher : Balai Besar Riset Sosial Eonomi Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jsekp.v21i1.19965

Abstract

Mangrove  ecosystems  are  vital  for  coastal  socio-ecological  resilience,  yet  governance  outcomes  often  remain weak  due  to  institutional  fragmentation  and  escalating  climate  risks.  This  study  combines  a  PRISMA  2020 systematic review with bibliometric mapping (VOSviewer) of 520 Scopus-indexed publications (2000–2025) to trace global research evolution and derive Indonesia-relevant insights. Publication output accelerated sharply after 2018, peaking at >60 documents in 2024, and research production is concentrated in high-income countries (e.g., the United States ~18.6%), while Indonesia contributes only ~9.7% despite hosting the world’s largest mangrove extent. Keyword mapping identifies three dominant clusters—ecological foundations, human ecology and  governance,  and  environmental  dynamics—with  recent  trends  shifting  toward  climate–governance  and resilience themes. The key gap is that governance and resilience discourse rarely translates into an integrated institutional design linking multi-level coordination, community adaptive capacity, and long-term financing; the novelty of this study is the Dynamic Adaptive Institutional Alignment Framework that explicitly integrates these components to inform Indonesia-oriented governance reform. Findings support moving beyond restoration targets toward adaptive, learning-based, and financially durable governance architectures. The study contributes theoretically by operationalizing adaptive governance within mangrove socio-ecological systems and offers policy guidance for strengthening climate-responsive and inclusive coastal governance under conditions of increasing uncertainty. 
Performance of Microalgae Consortia in Palm Oil Mill Effluent Remediation: An Eco-Friendly Strategy Andin Vita Amalia; Tri Retnaningsih Soeprobowati; Marcelinus Christwardana
Jurnal Pendidikan IPA Indonesia Vol. 15 No. 1 (2026): March 2026
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v15i1.40485

Abstract

Palm oil production continues to grow in line with global market demand; however, production waste is also expected to increase. The treatment of Palm Oil Mill Effluent (POME) remains a critical environmental challenge due to its high organic load and complex pollutant composition, thereby requiring serious management. This study investigates the potential of four microalgal consortia in remediating POME. A quantitative experimental approach was employed to evaluate the efficiency of the microalgae consortium exposed to different POME concentrations (25%, 50%, and 75%) over 14 days. The results revealed that the three-species consortium CNT (Chlorella vulgaris, Nannochloropsis oculata, and Tetraselmis chuii) exhibited superior performance in reducing COD, BOD, and TSS, with removal efficiencies of 77.55%, 72.73%, and 49.7%, respectively, compared to the two-species consortium. The optimal physicochemical parameters supporting CNT growth were recorded at pH 9.19-9.6, 29.1-30.6 °C, and adaptive salinity up to 41 ppt. The biomass yield of the CNT consortium (3.862 g L⁻¹ at 25% POME) was lower than that of NT (4.671 g L⁻¹ at 25% POME), indicating that CNT allocated more energy to detoxifying and remediating POME than to biomass accumulation. Future research should focus on optimizing response surface methodology and scaling up photobioreactor systems through metagenomic and transcriptomic analyses to simultaneously maximize remediation efficiency and biomass productivity of the CNT consortium. These findings provide strategic opportunities to harness polyculture microalgae consortium as a sustainable, scalable, and economically viable technology for POME remediation.  
Co-Authors Andin Vita Amalia Marcelinus Christwardana Nur Arifatul Ulya Oki Rachmalia Rozi Riche Hariyati Riesti Triyanti Sri Sumiyati