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All Journal Jurnal Agrotek Tropika JURNAL PERIKANAN TROPIS
Iswahyudi Iswahyudi
Samudra University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology

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FIRST REPORT: EXISTENCE OF ALPHEID SHRIMP (Alpheus lobidens De Haan 1849) IN MANGROVE ECOSYSTEM OF KUALA LANGSA, ACEH, INDONESIA Helmi Akbar; Teuku Muhammad Faisal Faisal; Siti Komariah; Andika Putriningtias; Muhammad Fauzan Isma; Syamsul Bahri; Iswahyudi Iswahyudi; Amal Saber Abdel-Rahman; Esraa Elsaeed Ibrahim Ammar; Muhammad Arif Nasution
JURNAL PERIKANAN TROPIS Vol 8, No 2 (2021)
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jpt.v8i2.5944

Abstract

AbstractThe existence of alpheid shrimp species in Indonesia is not too much found in the latest scientific publications. Alpheid shrimp species can be used as an indicator to assess the quality of the environment in mangrove areas. The discovery of shrimp species from the Alpheid group adds to the list of biodiversity in the mangrove area of Kuala Langsa. Biodiversity of a high number of species in this group of shrimp is usually found in mangrove areas with muddy sand beaches. This is because, this type of shrimp has a habit of living in muddy areas. The living zone of this type of shrimp is almost the same location as the type of crab that is wrapped like the Scylla serrata group. Mangrove area kuala langsa although it has mangrove biodiversity that is relatively high. Kuala Langsa mangrove forests are dominated by the Rhizoporaceae group, which is a type of vegetation that is effective as a sediment trap from the direction of the river estuary while holding abrasion from the direction of the sea. In the current year there is also a condition of decrease in the number of large trees. This is caused by the harvest of mangrove wood to produce charcoal for fuel purposes. This condition will slowly make the function of the ecosystem decrease. Where the role of ecosystems provide living niches for aquatic organisms is decreasing. Land clearing of certain areas of the mangrove area for physical infrastructure purposes such as the construction of restaurants, settlements, roads, small aircraft runways, reduces the ability of the region to maintain the function of its ecosystem. The next thing is the ecological pressure for aquatic biota that has living niches in mangrove areas.Keyword: alpheid shrimp, alpheus, mangrove, ecosystem, kuala langsa, aceh
DELINEATION AND IDENTIFICATION OF RIVER BASIN WATERSHED FORMS USING GEOGRAPHIC INFORMATION SYSTEMS AND REMOTE SENSING Fiqih Azzahra; Iswahyudi Iswahyudi; Rosmaiti Rosmaiti
Jurnal Agrotek Tropika Vol. 14 No. 3 (2026): JURNAL AGROTEK TROPIKA VOL 14, AGUSTUS 2026
Publisher : Departement of Agrotechnology, Agriculture Faculty, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jat.v14i3.11055

Abstract

Based on data from the Central Statistics Agency (BPS) in 2024, in the last three years there have been 62 floods in East Aceh Regency, Langsa City, and Aceh Tamiang Regency, with details of 29 incidents in East Aceh, 13 incidents in Langsa City, and 20 incidents in Aceh Tamiang. The high frequency of flooding indicates the need for hydrological studies in the Krueng Bayeun, Krueng Langsa, and Krueng Tamiang River Basins (DAS). This study aims to analyze watershed boundaries, topographic characteristics, and the shape and pattern of river flow direction using a Geographic Information System (GIS) based on Digital Elevation Model (DEM) data. The study was conducted using a quantitative descriptive survey method through remote sensing analysis. The results of the Spatial Analyst Hydrology analysis show that the watershed area is depicted in the form of a polygon as the main watershed area. The roundness ratio values ​​of the Krueng Bayeun, Krueng Langsa, and Krueng Tamiang watersheds are 0.23; 0.30; and 0.34, respectively, indicating that the three watersheds are elongated. Water flow is focused toward low-lying areas, potentially increasing water accumulation and the risk of flooding, especially during the rainy season. All three watersheds are dominated by dendritic drainage patterns with moderate river density, indicating sufficient water reserves. The Krueng Bayeun and Krueng Langsa watersheds are dominated by flat to gentle slopes, resulting in slower river flow and longer retention of standing water. Meanwhile, the Krueng Tamiang watershed is dominated by steep to very steep slopes, accelerating flow, increasing erosion, and potentially causing flooding in downstream areas.  
Co-Authors Amal Saber Abdel-Rahman Andika Putriningtias Esraa Elsaeed Ibrahim Ammar Fiqih Azzahra Helmi Akbar Muhammad Arif Nasution Muhammad Fauzan Isma Rosmaiti Rosmaiti Siti Komariah Syamsul Bahri Teuku Muhammad Faisal Faisal