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All Journal Acta Aquatica: Aquatic Sciences Journal Jurnal Akuakultur Sungai dan Danau Jurnal Pengabdian Magister Pendidikan IPA Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan
Lubis, Syahnan Aly
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Earth & Planetary Sciences Education Engineering Materials Science & Nanotechnology Other

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Phytoplankton Abundance and Distribution Chloropyll-a in Reservoir Lubis, Syahnan Aly; Pratiwi, Niken Tunjung Murti; Effendi, Hefni
Depik Vol 13, No 1 (2024): APRIL 2024
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.13.1.33923

Abstract

Organic matter entering through the inlet and activities in the Koto Panjang Reservoir body is feared to be the main source of nutrient contribution in the form of nitrogen (N) and phosphate (P) for reservoir waters. Nutrients N and P are utilised by phytoplankton in the photosynthesis process. If this condition continues, it is feared that it will affect water quality (blooming algae) which has an impact on aquatic biota. This study aims to determine the type and abundance of phytoplankton along with the distribution of chlorophyll a in reservoir waters. This study used descriptive, qualitative and quantitative methods and analysed the distribution of chlorophyll a using surfer software. Based on the results of the study, it is known that water quality is relatively good with temperatures ranging from 26-310C, brightness ranging from 0.69-1.96 m, dissolved oxygen (DO) is 5.60-6.80 mg/L and turbidity is 1-6 NTU. The results showed that phytoplankton composition was composed of 5 classes consisting of Euglenophyceae (1 species), Cyanophyceae (3 species), Conjugatophyceae or Zygnematophyceae (4 species), Chlorophyceae (4 species) and Bacillariophyceae (10 species). The dominating class in the reservoir zonation is different. In the riverine zone the Bacillariophyceae class dominates by 60.06%, in the transition zone the Cyanophyceae class by 91.60% and in the lacustrine zone the dominating class is Conjugatophyceae or Zygnematophyceae by 78.69%. Phytoplankton abundance ranged from 166.5-2,193 sell/m3. The highest abundance was located in the lacustrine zone and the lowest abundance in the riverine zone. The distribution of chlorophyll a in Koto Panjang Reservoir is varied, the highest distribution is located in the transition zone to the lacustrine zone.
Analisis Spasial Untuk Memprediksi Risiko Bencana Banjir di Daerah Aliran Sungai Lubis, Syahnan Aly; Reynaldi, Ilham; Zakiah, Zakiah; Aprisanti, Rizka
Jurnal Akuakultur Sungai dan Danau Vol 10, No 2 (2025): Oktober
Publisher : Universitas Batangahari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/akuakultur.v10i2.270

Abstract

Land use change significantly alters the hydrological characteristics of watersheds, especially in rapidly urbanizing river basins like the Citarum, Indonesia. This study aimed to assess the impact of land cover transformation on flood risk by integrating spatial modeling using Cellular Automata–Artificial Neural Network (CA–ANN) with hydrological simulation via HEC-HMS. Multi-temporal Landsat-8 imagery (2014–2024) was used to classify and project land cover to 2029, while Curve Number (CN) values derived from land use types were employed to estimate surface runoff. The results indicated a substantial increase in built-up areas, particularly in the midstream and downstream regions, replacing agricultural lands and reducing vegetative cover. This shift significantly raised CN values across most sub-watersheds, resulting in increased peak discharge, especially in Cikeruh, Cikapundung, and Cibeet. Flood risk mapping showed that over 50% of the sub-watersheds fall into the moderate to high-risk categories, driven by impervious surface expansion and declining infiltration capacity. This integrated spatial–hydrological approach underscores the importance of adaptive land use planning and watershed-based flood mitigation strategies. The findings offer a scientific basis for ecosystem-based disaster risk reduction and inform policy-making in flood-prone urbanizing basins
Edukasi Dan Pelatihan Pembuatan Minyak Rambut Herbal Berbahan Kemiri Untuk Pencegahan Rambut Rontok Di Kelurahan Paya Mabar, Kecamatan Stabat, Kabupaten Langkat Hartini, Putri Tri; Lubis, Syahnan Aly; Nabila; Sry Ulina Karo-karo; Ziza Putri Aisyia Fauzi
Jurnal Pengabdian Magister Pendidikan IPA Vol 8 No 4 (2025): Oktober-Desember 2025
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v8i4.13040

Abstract

Hair loss is a common problem that impacts appearance and self-confidence, so a safe and effective natural solution is needed. Candlenut oil (Aleurites moluccanus) contains essential fatty acids and vitamin E which are beneficial in strengthening the hair and nourishing the scalp. This community service program was carried out in Paya Mabar Village, Stabat District, Langkat Regency, with the aim of increasing community knowledge and skills in making herbal hair oil made from candlenut. A total of 35 participants participated in the activity through counseling, demonstration, and hands-on practice, accompanied by evaluation using pre-test and post-test. The results showed an average knowledge increase of 38%, and 80% of participants succeeded in producing good quality hazelnut oil despite facing constraints on temperature regulation. This program proved effective in improving hair health literacy, natural ingredient processing skills, and opening up entrepreneurial opportunities based on local herbal products.
Program Orientasi Pendidikan Tinggi Untuk Meningkatkan Aspirasi Akademik Siswa SMA Di Kabupaten Bengkalis Nur, M. Irsyad; Isma Mulyani; Rizka Aprisanti; Syahnan Aly Lubis; Yola Yolanda; Febrina Rita Albeta; Vivi Rizkiana Aprilla; Asnika Putri Simanjuntak
Jurnal Pengabdian Magister Pendidikan IPA Vol 8 No 4 (2025): Oktober-Desember 2025
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v8i4.14608

Abstract

Transisi dari pendidikan menengah ke perguruan tinggi merupakan fase krusial yang sering diwarnai oleh keterbatasan informasi dan rendahnya kesiapan siswa dalam merencanakan keberlanjutan studi. Kurangnya pemahaman mengenai jalur akademik serta dinamika kehidupan kampus berpotensi menimbulkan ketidakpastian dalam pengambilan keputusan pendidikan dan melemahkan aspirasi untuk melanjutkan studi. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk memperkuat kesiapan dan orientasi akademik siswa melalui penyediaan informasi yang terstruktur dan kontekstual mengenai keberlanjutan pendidikan.Kegiatan dilaksanakan pada Desember 2025 di tiga sekolah menengah atas di Kabupaten Bengkalis dengan melibatkan sekitar 450 siswa kelas XII. Program dirancang menggunakan pendekatan edukatif-partisipatif melalui pemaparan interaktif, diskusi terbimbing, serta dialog reflektif yang mencakup jalur seleksi masuk perguruan tinggi, perencanaan studi, adaptasi terhadap lingkungan akademik, dan penguatan kompetensi non-akademik. Evaluasi dilakukan melalui observasi partisipatif dan analisis respons siswa selama kegiatan berlangsung. Hasil kegiatan menunjukkan adanya peningkatan pemahaman siswa terhadap pilihan pendidikan lanjutan serta berkembangnya kesiapan psikologis dalam menghadapi transisi akademik. Tingginya keterlibatan peserta mengindikasikan bahwa akses terhadap informasi yang komprehensif mampu mengurangi ketidakpastian sekaligus mendorong perencanaan pendidikan yang lebih percaya diri. Temuan ini menegaskan bahwa intervensi edukatif berbasis literasi pendidikan dapat berperan sebagai strategi awal dalam mendukung pengambilan keputusan akademik yang lebih terarah, khususnya pada wilayah dengan keterbatasan akses informasi.
Pemberdayaan Agropreneur Muda Melalui Pelatihan Budidaya Ikan Lele Kolam Mini Di SMP Sumbarrang Kabupaten Gowa Muhammad Aldair Mukstofa Carda; Zakiah; Mustaqiim Pangestu; Syahnan Aly Lubis; Nur Islah Sugianto
Jurnal Pengabdian Magister Pendidikan IPA Vol 9 No 1 (2026): Januari - Maret 2026
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v9i1.13584

Abstract

This community service program was conducted to enhance the entrepreneurial capacity of junior high school students by strengthening their technical literacy in catfish aquaculture, a fisheries commodity with substantial economic value. The activity was implemented from 3–7 November 2025 at SMP Sumbarrang, Gowa Regency, and was delivered in a theoretical format due to limited facilities for practical aquaculture activities. The training materials covered the concept of youth agropreneurship, household-scale catfish farming techniques, feed management, community-based marketing strategies within the school environment, business feasibility analysis, and the development of entrepreneurial action plans. The methods employed included interactive lectures, group discussions, business plan simulations, and pre–post test evaluations. The results indicated a significant improvement in students’ technical literacy, reflected by a 49–50% increase in understanding related to farming techniques, feed management, and market opportunities. Entrepreneurial motivation also increased among 78% of participants, demonstrated by greater willingness to express business ideas and heightened awareness of their family’s economic potential. Support from schools and parents was identified as a key factor strengthening the sustainability of the program. Overall, this activity produced a replicable empowerment model for cultivating young agropreneurs in rural school settings, contributing to local economic development through the fisheries sector.
Microplastic abundance and characteristics in the Kahayan River Downstream Area: Implications for the food safety of processed fish products Zakiah; Muhammad Aldair Mukstofa Carda; Syahnan Aly Lubis
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 13: No. 1 (April, 2026)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v13i1.25089

Abstract

The increasing anthropogenic activities along the Kahayan River contribute to the discharge of plastic waste into aquatic environments, leading to microplastic accumulation that contaminates river ecosystems. This study aims to analyze the abundance and characteristics of microplastics in water, sediment, and fish from the downstream area of the Kahayan River, Central Kalimantan, and to evaluate their implications for the food safety of fish-based products. Sampling was conducted at four stations within the downstream area from March to May. Water, sediment, and fish samples were processed using the wet peroxide oxidation (WPO) method, and microplastics were identified microscopically. The results revealed that microplastics were present at all sampling stations with average abundances of 3.22 particles/L in water, 7.58 particles/kg-dw in sediment, and 2.12 particles/individual in fish. No significant differences were found among stations, indicating that contamination has become widespread throughout the downstream area. Fibers were the dominant type, followed by fragments, foams, and granules, with most particles measuring <300 µm and mainly white/transparent, blue, and black/gray. These patterns suggest that microplastic sources primarily originate from domestic activities, fisheries, and insufficient waste management. The presence of microplastics in edible fish indicates potential transfer through the aquatic food chain, posing a risk to food safety and public health. Therefore, integrated mitigation measures are urgently needed, including monitoring of fish quality, setting microplastic contamination limits in food products, and strengthening plastic waste management policies to ensure the sustainability of fishery resources and public health in Central Kalimantan. Keywords: Fish; Food Safety; Microplastics; Kahayan River
Microplastic composition in water, sediment, and fish in the Middle Section of the Kahayan River: Implications for the sustainability of floating net cage aquaculture Muhammad Aldair Mukstofa Carda; Zakiah; Syahnan Aly Lubis
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 13: No. 1 (April, 2026)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v13i1.25090

Abstract

Microplastics are emerging pollutants widely detected in freshwater ecosystems, including rivers that act as major pathways for plastic waste transport to the ocean. This study aimed to analyze the abundance and characteristics of microplastics in water, sediment, and fish from the middle section of the Kahayan River and to assess their implications for the sustainability of floating net cage aquaculture. Sampling was conducted at five stations representing different levels of anthropogenic activity. Water, sediment, and fish samples were processed using the wet peroxide oxidation (WPO) and NaCl density separation methods, followed by microscopic identification. The results revealed that microplastics were widely distributed across all environmental compartments, with mean abundances of 3,14 particles/L in water, 7,31 particles/kg-dw in sediment, and 3,63 particles/individual in fish. The highest concentrations were found in stations with intensive aquaculture, dense settlements, and active trading areas. The dominant types were fibers and fragments, mainly white, blue, and black/gray in color. Particles <300 µm predominated in water and fish, whereas those >1000 µm were more abundant in sediment. These findings indicate the transfer of microplastics from abiotic to biotic components, suggesting potential bioaccumulation within the aquatic food chain. The presence of microplastics in aquaculture environments may degrade water and fish quality, posing threats to aquaculture sustainability and food safety for local communities along the Kahayan River. Keywords: Fish; Floating net cage; Kahayan River; Microplastics
Co-Authors Asnika Putri Simanjuntak Febrina Rita Albeta Hartini, Putri Tri Hefni Effendi Isma, Muhammad Fauzan M. Irsyad Nur Muhammad Aldair Mukstofa Carda Muhammad Aldair Mukstofa Carda Mustaqiim Pangestu Nabila Niken Tunjung Murti Pratiwi Nur Islah Sugianto Reynaldi, Ilham Rizka Aprisanti Sry Ulina Karo-karo Vivi Rizkiana Aprilla Yola Yolanda Zakiah Zakiah Zakiah Zakiah Zakiah Ziza Putri Aisyia Fauzi