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All Journal HAYATI Journal of Biosciences ILMU KELAUTAN: Indonesian Journal of Marine Sciences Aquacoastmarine Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) JURNAL ENGGANO Omni-Akuatika Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat OLDI (Oseanologi dan Limnologi di Indonesia) Indonesian Journal of Agricultural Research Journal of Sylva Indonesiana Indonesian Journal of Limnology Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan AQUACOASTMARINE: Journal of Aquatic & Fisheries Sciences Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan Journal of Fisheries & Marine
Rusdi Leidonald
Department Of Aquatic Resources Management, Agriculture Faculty, Universitas Sumatera Utara, Medan, 20155. Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences Veterinary Other

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MORFOMETRI DAN BATIMETRI DANAU PALAS ASRI KECAMATAN MEDANG DERAS KABUPATEN BATUBARA Leidonald, Rusdi; Rambe, Ade Septiya Jumiani; Muhtadi, Ahmad; Fadhilah, Amanatul
AQUACOASTMARINE: Journal of Aquatic and Fisheries Sciences Vol. 3 No. 1 (2024): AQUACOSTMARINE: Journal of Aquatic and Fisheries Sciences
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jafs.v3i1.14645

Abstract

Morfometri danau merupakan karakteristik fisik dari badan danau yang dapat menggambarkan berbagai potensinya. Tujuan dari penelitian ini adalah untuk mengetahui aspek morfometri dan batimetri di perairan Danau Palas Asri Kecamatan Medang Deras Kabupaten Batubara. Penelitian ini dilakukan pada bulan Oktober sampai November 2022. Pengambilan data yang dilakukan pada penelitian ini adalah data keliling danau, data kedalaman, panjang dan lebar danau, debit air serta kualitas air. Data-data tersebut diolah menggunakan Arcmap. Hasil dari penelitian ini adalah Danau Palas Asri (Danau A dan Danau B) secara berturut-turut memiliki luas 33.231 dan 26.544 , panjang maksimum 337,29 m dan 340,26 m, lebar maksimum 130,42 m dan 119,40 m serta panjang keliling danau 1.152,27 m dan 859,63 m. kedalaman maksimum 2,5 m dan 2,8 m, kemiringan rata-rata 4,72% dan 4,69%. Volume air danau yang dapat dimanfaatkan sebanyak 49.938,74 dan 44.062,64 dengan waktu tinggal air sekitar 20-21 hari dan 23-24 hari. Parameter kualitas fisika kimia air Danau Palas Asri (Danau A dan Danau B) secara berturut-turut adalah memiliki rata-rata Total Suspended Solid (TSS) 10,66 mg/L dan 9,33 mg/L, Total Dissolved Solid (TDS) 85,36 mg/L dan 67,96 mg/L, Daya Hantar Listrik (DHL) 15,36 S/cm dan 11,63 S/cm, Fosfat 0,10 mg/L dan 0,11 mg/L. Nilai TSI berkisar 16,05 - 21,10 status trofik Danau Palas Asri tergolong oligotrofik yaitu kondisi produktivitas dan unsur hara rendah. Kata Kunci : Batimetri, danau, kesuburan perairan, morfometri danau,
Trophic States and Fishery Potential of Tidal Lakes, Lake Siombak, Medan, Indonesia Ahmad Muhtadi; Rusdi Leidonald; Ahyar Pulungan; Nur Rohim; Qadar Hasani
Indonesian Journal of Limnology Vol. 4 No. 2 (2023): Indonesian Journal of Limnology
Publisher : Indonesian Society of Limnology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51264/inajl.v4i2.45

Abstract

Siombak Lake is one of the tropical coastal lakes in Indonesia, which is unique and distinctive because it is directly influenced by the tidal dynamics of the Malacca Strait (7 km away) through the Belawan estuary. Therefore, Lake Siombak is brackish in its extensive pool. This lake functions as a water catchment, fishing area, and recreation area. This research aims to determine the fertility level and fisheries potential of Lake Siombak waters. The research was conducted from September 2018 to August 2019, but chlorophyll data was only taken for 4 months, namely November 2018, February, June, and August 2019. Water samples were taken during high tide and low tide conditions. Data taken to determine water fertility includes water brightness, phosphate concentration, and chlorophyll a. The fertility of lake waters is determined using various methods, namely the trophic State Index (TSI) method, Trix method, Trophic State Index Lamp (TSI Lamp), and Tropical Level Index (TLI). The brightness of Lake Siombak's waters ranges from 0.6–1.1 m. Phosphate concentrations ranged from 0.05-14.16 mg/L. The chlorophyll content in Siombak Lake ranges from 0.019 – 0.445 mg/m3. The fertility level of Lake Siombak waters is eutrophic-hypereutrophic with a TSI value of 52.0-71.9; Trix index of 2.8-4.9; TSI lamp is 53.7-68.4; and TLI of 4.76-6.32. Spatially, the most fertile lake location is Station 1 (southern region), and temporally the dry season (February) is more fertile than the rainy season (November). The fisheries potential in Lake Siombak ranges from 320 – 773 kg/ha/month. The potential for fisheries production in Lake Siombak is highest in March.
Morphometric and Bathymetric Characteristics and Trophic Status of Silosung Lake, Lintong Nihuta District, Humbang Hasundutan Regency, North Sumatra Province Muhtadi, Ahmad; Silaban, Matthew Federich Willyam; Leidonald, Rusdi; Dewinta, Astrid Fauzia
Indonesian Journal of Agricultural Research Vol. 7 No. 3 (2024): InJAR, Vol. 7, No. 3, November 2024
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/injar.v7i3.15715

Abstract

Lakes can form naturally through natural events or artificially through human activities. Silosung Lake is a natural lake in Siponjot Village, Lintong Nihuta District, Humbang Hasundutan Regency. Lake morphometry refers to the physical characteristics of the lake body, while bathymetry refers to the measurement and mapping of the topographic conditions of the lake bottom. It is essential to know the morphometric and bathymetric characteristics and trophic status of the lake to achieve sustainable lake management. This study aims to determine the characteristics of bathymetry, morphometry, and tropic status of Lake Silosung. This research was conducted in July 2023. The data collection in this study includes lake perimeter data, lake depth data, lake length and width data, and lake water quality data. This research indicates that Silosung Lake has an area of 104,806.6 m² with a lake perimeter length of 1,573.5 m, a maximum length of 474.53 m, and a maximum width of 420.62 m. The maximum depth is 17 m, the average depth is 10.09 m, the relative depth is 7.9% with an average slope of 15.9%, the compensation depth is 4.32 m, and the Shoreline Development Index (SDI) value is 2.74. The Morpho Edapic Index (MEI) value is 2.88. Silosung Lake has a lake water volume of 1,057,108.6 m³. The average Tropic State Index (TSI) value is 15.71, indicating that the trophic status of Silosung Lake is oligotrophic, meaning its productivity is low.
Water Quality Degradation in the Deli River Watershed, North Sumatra: Impacts of Land Use and Pollution Sources Leidonald, Rusdi; Muhtadi, Ahmad; Ashshiddiq, Muhammad Arif; Siahaan, Vania S.P; Manurung, Bunga Ulita
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 15 No 4 (2025): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.15.4.669

Abstract

Daerah Aliran Sungai Deli berperan penting dalam siklus hidrologi bagi di wilayah Medan dan sekitarnya. DAS Deli merupakan sumber air bersih untuk kota Medan. penelitian ini dilakukan dengan tujuan untuk mendeskripsikan kondisi kualitas air dan melaporkan statu mutu perairan secara spasial di DAS Deli. Waktu pengambilan sampel air Sungai Deli dilakukan pada bulan Juni-Juli tahun 2023 di Daerah Aliran Sungai Deli, Provinsi Sumatera Utara. Titik lokasi pengamatan dilakukan secara purposive sampling pada 46 titik yang berbeda secara spasial. Lokasi pengamatan tersebut mewakili bagian hilir (5 titik), tengah (16 titik), hulu (10 titik), dan termasuk anak-anak sungainya (15 titik). Penentuan status pencemaran DAS Deli menggunakan metode Indeks Pencemaran, National Sanitation Foundation-Water Quality Index (NSF-WQI), Canadian Council of Minister of The Environment (CCME), dan metode Singscore. Secara umum DAS Deli dicirikan dengan substrat pasir-kerikil dari hilir hingga hulu (Sub DAS Petane, Babura, dan Bekala) dan hanya sedikit yang bersubstrat berbatu di bagian hulu Sungai Sembahe di Sibolangit. Hal inilah yang menyebabkan DAS Deli secara umum terlihat keruh karena substrat mengalami pengadukan sehingga tingkat kekeruhan menjadi lebih tinggi. Kekeruhan di Sungai Deli mencapai 6.6 NTU hingga 78.3 NTU. Perairan yang selalu jernih hanya ditemukan pada substrat berbatu di bagian tengah sub DAS petane dan hulu sungai Sembahe. Berdasarkan hasil perhitungan dari berbagai indeks kualitas air dan metode bioindicator menunjukkan bahwa secara spasial kondisi perairan di DAS Deli bervariasi mulai dari kondisi yang buruk hingga baik/sangat baik. Kondisi sungai paling buruk terdapat pada bagian hilir di sub DAS Sei Sekambing dan Sub DAS Deli dengan status perairan yang tercemar sedang hingga buruk. Status perairan yang baik ditemukan pada bagian hulu sungai Sembahe
The Effect of Tides on Plankton Communities in the Belawan River Estuary, North Sumatra Leidonald, Rusdi; Muhtadi, Ahmad; Harahap, Cici Maulidiah; Mukra, Rizal; Ishak, Mohd Yusoff; Hasani, Qadar
HAYATI Journal of Biosciences Vol. 33 No. 1 (2026): January 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.1.114-128

Abstract

The Belawan Estuary is a highly important economic and logistics hub in Sumatra, serving as the primary maritime transportation route in western Indonesia. This estuary is also utilized for multiple purposes, including industrial activity, residential areas, and fisheries. These activities inevitably influence water quality, which in turn affects the presence and population dynamics of plankton in the estuary. This study aimed to examine the spatial and temporal distribution of plankton communities in the Belawan Estuary. Observation points were selected from eight locations representing different activities and regions, including areas near the sea, the middle section, and areas close to land. Plankton samples were collected during high and low tides following the tidal cycle (new moon, first quarter, full moon, and last quarter). Principal component analysis was performed to determine the influence of tidal cycles on plankton composition and abundance in the estuary. A total of 64 plankton genera from 16 classes were identified in the estuary. spatially, the highest abundance was recorded in the mouth estuary during low tide. Temporally, the highest plankton abundance across stations was during the first quarter phase at low tide. These findings indicate that tidal cycles significantly influence plankton abundance in the Belawan Estuary. This phenomenon is attributed to the tidal currents that transport nutrients from the lower layers to the surface waters during both high and low tides. Changes in plankton abundance and species composition can serve as indicators of water fertility in this region and reflect the impacts of changes in environmental conditions.
The The spawning aplication of Koi (Cyprinus carpio) using semi-natural method in Desa Perbarakan, Deli Serdang Regency Desrita; Manurung, Vindy Rilani; Siregar, Rizky Febriansyah; Leidonald, Rusdi; Fadhilah, Amanatul; Dewinta, Astrid Fauzia
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 2 (2020): ABDIMAS TALENTA : Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (409.609 KB) | DOI: 10.32734/abdimastalenta.v5i2.4922

Abstract

Based on statistical analysis from Dinas Kelautan Perikanan, Deli Serdang Regency in 2018, The capacity for freshwater aquaculture output was recorded at 1328.9 tons / year with a land area of 65.9 ha , which is a problem for the aquaculture community with the decreasing quantity of seed production, limited infrastructure and development management which is still conventional in Desa Perbarakan, Deli Serdang Regency, therefore it is important to implement the required application of science and technology, namely the implementation of semi-natural methods of spawning techniques of koi fish (Cyprinus carpio). Counseling, seminars and practices are the methods of tasks carried out. Extension activities were carried out by illustrating the conceptual awareness of the development of koi fish spawning strategies, the distribution of leaflets, the application of recognition technology, as well as tools and resources, including the dose of gonadotropin hormone (GnH) in broodfish and fish anaesthetic techniques. For female fish, the injected hormone level is 0.5 ml / kg and 0.1 ml / kg for male fish. The weight of the female fish is 1 kg tancho sanke doitsu, 0.5 ml/gr, and the weight of the male fish is 1 kg. At a dose of 0.1 ml / gr and 900 g of shiro, kohaku at a level of 0.09 ml / gr. The result is that the number of eggs is estimated at 10,000, and then the eggs hatch within 2-4 days. Boiled egg yolks are fed to the eggs which hatch into the larvae, then the larvae are transferred to the nursery pon after 10 days of age.
Sebaran benthos di ekosistem mangrove, Belawan Provinsi Sumatera Utara Leidonald, Rusdi; Manalu, Natasya Rebekka; Muhtadi, Ahmad
AQUACOASTMARINE: Journal of Aquatic and Fisheries Sciences Vol. 4 No. 2 (2025): AQUACOSTMARINE: Journal of Aquatic and Fisheries Sciences
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jafs.v4i2.22379

Abstract

Ekosistem mangrove merupakan habitat berbagai jenis biota, baik teresterial maupun akuatik. Beberapa biota seperti kelompok bentik ditemukan tenggelam dalam substrat, di permukaan substrat, menempel pada akar-akar mangrove, menempel pada batang, dan bahkan menempel pada daun mangrove, terutama mangrove kategori anakan atau semai. Penelitian ini bertujuan untuk melihat distribusi benthos di ekositem mangrove estuary Belawan, Provinsi Sumatera Utara. Pengambilan data dilaksanakan pada bulan Desember 2023 di Kawasan mangrove estuary Belawan, Provinsi Sumatera Utara. Pengambilan sample dilakukan di 28 stasiun dengan metode purposive sampling yang mewakili pada bagian hulu, tengah, dan belakang estuary Belawan. Bentos yang didapatkan di Estuari Belawan terdiri dari 3 kelas, 17 famili dan 40 spesies. Secara umum benthos yang ditemukan di Ekosistem mangrove yaitu kelompok moluska yang didomnasi oleh Gastropoda. Persebaran komunitas bentos pada ekosistem mangrove di Estuari Belawan yang didapatkan tersebar tidak merata pada 28 stasiun yang diamati. |Kepadatan terbanyak didapatkan pada stasiun 1 yaitu 104 ind/m2 dan nilai kepadatan terendah adalah pada stasiun V yaitu 14,6 ind/m2 Keyword: Benthos, estuary, gastropod, moluska, mangrove
Sebaran benthos di ekosistem mangrove, Belawan Provinsi Sumatera Utara Leidonald, Rusdi; Manalu, Natasya Rebekka; Muhtadi, Ahmad
AQUACOASTMARINE: Journal of Aquatic and Fisheries Sciences Vol. 4 No. 2 (2025): AQUACOSTMARINE: Journal of Aquatic and Fisheries Sciences
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jafs.v4i2.22379

Abstract

Ekosistem mangrove merupakan habitat berbagai jenis biota, baik teresterial maupun akuatik. Beberapa biota seperti kelompok bentik ditemukan tenggelam dalam substrat, di permukaan substrat, menempel pada akar-akar mangrove, menempel pada batang, dan bahkan menempel pada daun mangrove, terutama mangrove kategori anakan atau semai. Penelitian ini bertujuan untuk melihat distribusi benthos di ekositem mangrove estuary Belawan, Provinsi Sumatera Utara. Pengambilan data dilaksanakan pada bulan Desember 2023 di Kawasan mangrove estuary Belawan, Provinsi Sumatera Utara. Pengambilan sample dilakukan di 28 stasiun dengan metode purposive sampling yang mewakili pada bagian hulu, tengah, dan belakang estuary Belawan. Bentos yang didapatkan di Estuari Belawan terdiri dari 3 kelas, 17 famili dan 40 spesies. Secara umum benthos yang ditemukan di Ekosistem mangrove yaitu kelompok moluska yang didomnasi oleh Gastropoda. Persebaran komunitas bentos pada ekosistem mangrove di Estuari Belawan yang didapatkan tersebar tidak merata pada 28 stasiun yang diamati. |Kepadatan terbanyak didapatkan pada stasiun 1 yaitu 104 ind/m2 dan nilai kepadatan terendah adalah pada stasiun V yaitu 14,6 ind/m2 Keyword: Benthos, estuary, gastropod, moluska, mangrove
Biodiversity and Ecosystem Status of Mangroves in the Belawan Estuary, North Sumatra Province, Indonesia Muhtadi, Ahmad; Leidonald, Rusdi; Fadhilah, Amanatul; Habibi, Arya Yusuf; Manalu, Natasya Rebekka; Nasution, Decy M. Carolina; Pulungan, Parhan; Begum, Salma
Journal of Sylva Indonesiana Vol. 9 No. 01 (2026): Journal of Sylva Indonesiana
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsi.v9i01.19749

Abstract

Estuaries function as sediment deposition zones that provide essential substrates for mangrove development. Consequently, estuaries and mangroves constitute integral components of coastal ecosystems. The mangrove ecosystem in the Belawan Estuary, North Sumatra Province, is increasingly threatened by rapid urban expansion in Medan City. This study aimed to assess mangrove biodiversity, structural characteristics, and ecological status in the Belawan Estuary. Field surveys were conducted in November 2023 across 28 sampling stations representing seaward, middle, and landward sections of the estuary. Vegetation data were analyzed using density, diversity, evenness, dominance, and Importance Value Index (IVI). A total of 26 mangrove species were recorded, comprising 21 true mangrove species and 5 associated species. The most widely distributed species were Avicennia marina, Avicennia lanata, and Nypa fruticans. Mangrove density ranged from 533 to 2,733 ind ha⁻¹, with an average of 1,420 ind ha⁻¹. Shannon–Wiener diversity values ranged from 0.04 to 1.95, indicating relatively low diversity in several landward stations dominated by N. fruticans. Although the overall condition of mangroves in the Belawan Estuary is classified as good, the ecosystem remains highly vulnerable to land-use conversion under the revised spatial planning framework. Strengthening conservation-oriented spatial policy is therefore essential to ensure long-term ecosystem sustainability.
Co-Authors Achmad Taher Daulay Ade Artia Gultom Adolf C Sinambela Ahmad Muhtadi Ahmad Muhtadi Ahmad Muhtadi Ahmad Muhtadi Rangkuti Ashshiddiq, Muhammad Arif Azvi Mauriza Damanik Begum, Salma Cut Hannelida Eriza Darma Bakti Daulay, Achmad T. Desrita Desrita Dewinta, Astrid Fauzia Dinarta Pardede DWI SURYANTO Dwy Murphy Banjarnahor Elisa Lestari Simanjuntak Eri Yusni Eri Yusni Eriyusni Eriyusni Fadhilah, Amanatul Fadhilah, Amanatul Fenlya Meitha Pasaribu Fransiska Falentina Naibaho Frizca Junelda Karlyssa Ghanang Dhika Aria Gilang Pradifta S Habibi, Arya Yusuf Hapiz Fahrezi Hsb Harahap, Cici Maulidiah Hasan Sitorus Hesti Wahyuningsih Ipanna Enggar Susetya Ipanna Enggar Susetya, Ipanna Enggar Ira Mutiara Lumbangaol Irfan Al Husainy Irwanmay Irwanmay Ishak, Mohd Yusoff Ivan Sinaga Johannes Keynes Harianja Julia Syahriani Hasibuan Junaidy, Adil Kamto Triwibowo Manalu, Natasya Rebekka Manullang, Kristina Natalia Manurung, Bunga Ulita Maria Christie Sembiring Mariany Siagian Meisara Karolina Memory Oktavia Sihombing Miswar Budi Mulya Mohammad Basyuni Muhammad Hilman Zarkasih Muhammad Rakezza Rifzy Rifzy Muhtadi, Ahmad Muhtadi Nasution, Decy M. Carolina Nur Rohim Nurul Azmi Pindi Patana Pulungan, Parhan Putra S. A Sihaloho Qadar Hasani Qadar Hasani Rambe, Ade Septiya Jumiani Rasyid Kurnia Nasution Ratna Dewi Sinaga Rawiyatul Hikmah Rizal Mukra Rizka Amelia Rudi H. Siregar Sabrilianti Yahra Saleha Bako Sandy, Sarah D. Sangap Ginting Santa Odilia Permatasari Nainggolan Saville, Ramadhona Shusi Novita Siregar Siahaan, Vania S.P Silaban, Matthew Federich Willyam Simamora, Lauran F.M. Siregar, Rizki Febriansyah Siregar, Rizky Febriansyah Sumarwan Syahputra Syammaun Usman Tantri Ayu Syahfitri Tawakal Kusuma Ternala Alexander Barus Tiur Natalia Manalu Vindy Rilani Manurung Yoes Soemaryono Yudha Perdana Putra Lubis Yunasfi Djayus yunasfi yunasfi Yuntha Bimantara Zulham A. Harahap Zulham Apandy Harahap Zulham Apandy Harahap Zulkifli, Ahmad