: Mangrove is a vegetation that has many benefits. One of them, mangrove provide living space to many organism. Crabs are one of a wide variety of invertebrate animals that live in association with mangroves. The importance of the role of crabs in the mangrove ecosystem because the crab is a burrowing organism, so it will support the mangrove land becomes fertile. This study aims to determine the diversity of crabs, dominant or most commonly found crab species and crab living habitats associated with mangrove trees around Kuala Langsa mangrove forest, Langsa City, Aceh. This research is only descriptive. Sampling is done by 2 methods that is qualitative in quadrant plot 5x5 meter2 and quantitative in quadrant plot 1x1 meter2. From the results of the study found 15 species of crabs from 7 genera and 5 families. The index value of diversity for all research stations was included in the medium category. The uniformity index is high and there is no type dominance on all stations. Of the 15 types of crabs, there are 3 types of economical crabs (Scylla serrata, Scylla olivacea and Thalamita crenata) and 12 types of non-economical crabs. In general, the crabs of the Genus Uca are the most commonly found crabs in the study sites. Keywords: Aceh, Biodiversity, Crabs, Kuala Langsa, Mangrove Abstrak : Mangrove merupakan suatu vegetasi yang memiliki banyak manfaat. Salah satu dari manfaat mangrove adalah menyediakan ruang hidup bagi banyak organisme. Kepiting merupakan salah satu dari berbagai jenis hewan avertebrata yang hidup berasosiasi dengan mangrove. Pentingnya peran kepiting pada ekosistem mangrove karena kepiting merupakan hewan yang hidup meliang, sehingga akan membuat tanah pada ekosistem mangrove menjadi subur. Penelitian ini bertujuan untuk mengetahui keanekaragaman jenis kepiting, jenis kepiting yang mendominasi atau paling sering ditemukan dan habitat hidup kepiting yang berasosiasi dengan pohon mangrove di sekitar hutan mangrove Kuala Langsa, Kota Langsa, Aceh.Penelitian ini bersifat deskriptif. Pengambilan sampel dilakukan dengan 2 metode yaitu kualitatif pada kuadran plot 5x5 meter2 dan kuantitatif pada kuadran plot 1x1 meter2. Dari hasil penelitian ditemukan 15 jenis kepiting dari 7 genus dan 5 famili.Nilai indeks keanekaragaman untuk semua stasiun penelitian termasuk dalam kategori sedang.Indeks keseragaman tinggi dan tidak ada dominansi jenis pada seluruh stasiun.Dari 15 jenis kepiting, terdapat 3 jenis kepiting ekonomis (Scylla serrata, Scylla olivacea dan Thalamita crenata) dan 12 jenis kepiting non-ekonomis.Secara umum, kepiting dari genus Uca merupakan kepiting yang paling banyak ditemukan di lokasi penelitian. Kata kunci: Aceh, Keanekaragaman, Kepiting, Kuala Langsa, Mangrove
The aim of the study was to describe the coral reef condition Background: in Bangka Belitung Islands, particularly from Gaspar Strait. This research location is well known for its underwater archaeological discovery and shipwreck sites. Recent increases in mining, fishing and tourism activities in the surrounding islands might have affected the condition of the coral reef.Nine islands inside the strait were visited (i.e. Langer, Kembung, Methods: Piling, Aur, Salma, Pongok, Celagen, Kelapan, and Lepar Island), and a line transect was used to observed coral reef conditions.Coral cover was found to be predominantly in fair conditions Results: (25-50%). Coral mortality index also tended to be high, which indicated that the coral reef ecosystem was in threatened conditions. Previous and recent reports also reported the same condition as found by this study.Degradation of the coral community in Bangka Belitung Conclusion: Islands is likely caused by human activities. This suggests that increasing human activities significantly affects the coral reef condition. Protection of coral reefs with sustainable management for mining activity, tourism and fishing practices are needed.
Increased human activity towards the water bodies will change the condition of water quality. Case study in Langsa, Aceh, It was found that an increase in Some physical parameter (TSS) that exceeds the value determined in PP 82 of 2001 (Indonesian government standard). The high value of TSS in Station 2 and Station 3 indicates that the sediment loading to the water body is high, especially in Station 3, where the TSS concentrations far exceed the standard. Activity of type C surface mining materials tends to affect the brightness, turbidity, depth and TSS. Water conditions with low pH were also found in this study. In location studied no EPT larvae were found Keyword: Langsa, Water Quality, Stream, Total Suspended Solid, Anthropogenic Activity
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