Pemetaan Distribusi Mangrove Menggunakan Citra Sentinel-2A: Studi Kasus Kota Langsa

Mangroves are one of the most productive ecosystems for human life, marine ecosystems, and coastal areas. Mangrove distribution is a distribution based on specific geographical or administrative boundaries. Kota Langsa is one of the areas that has a good representation of the distribution of mangroves. Therefore, researchers studied the Kota Langsa area because Kota Langsa is one of the areas with the largest and most diverse mangrove ecosystem in Aceh Province. This study examines the mapping of mangrove distribution using Sentinel-2A multispectral imagery with composite images of Red, Green, and Blue. This research uses SNAP software. The research stages consist of radiometric correction, atmospheric correction, and multispectral image classification. The method used in image classification is the maximum likelihood algorithm. The use of the maximum likelihood algorithm is because the maximum likelihood algorithm gives the best results among other algorithms. The development of the research is the distribution of mangroves in Langsa City, covering an area of 4727.35 ha, which is divided into three sub-districts and eleven gampong (kelurahan). The sub-districts that have mangrove distribution are East Langsa District covering an area of 3240.25 Ha (68.55%), Langsa Barat District covering an area of 1486.47 Ha (31.45%), and Langsa Lama District covering an area of 0.63 Ha (0.013)

Aplikasi Data Penginderaan Jauh Untuk Kajian Kondisi Eksisting Ekosistem Mangrove di Wilayah Kepesisiran Kecamatan Pantai Labu, Kabupaten Deli Serdang, Sumatera Utara

Penelitian ini dilaksanakan di wilayah kepesisiran Kecamatan Pantai Labu, Kabupaten Deli Serdang, Sumatera Utara. Penelitian ini bertujuan untuk mengetahui kondisi eksisting, mengetahui indeks keanekaragaman, dan mengetahui agihan ekosistem mangrove yang tumbuh di wilayah kepesisiran Kecamatan Pantai Labu. Penelitian ini menggunakan metode survei. Metode pengumpulan data dengan sampling serta metode analisisnya secara kualitatif. Populasi dari penelitian ini adalah seluruh ekosistem mangrove yang terdapat di daerah penelitian. Teknik pengambilan sampel dengan cara purposive sampling untuk penentuan transek garis dan petak contoh (transect line plot). Teknik pengumpulan data meliputi analisis data sekunder, observasi, dan perhitungan langsung di lapangan. Variabel penelitian ini meliputi kerapatan (densitas), kekerapan (frekuensi), luas penutupan (coverage), indeks nilai penting (importance value index), indeks dominasi (index of dominance), dan indeks keanekaragaman (diversity). Teknik analisis hasil menggunakan analisis spasial dan analisis deskriptif. Hasil penelitian menunjukkan kondisi eksisting ekosistem mangrove yang terdapat di Kecamatan Pantai Labu berdasarkan hasil interpretasi visual citra Google Earth Tahun 2015 sebesar 517,95 ha. Keanekaragaman vegetasi mangrove di Kecamatan Pantai Labu memiliki indeks keanekaragaman H’ < 1,0. Artinya keanekaragaman mangrove di Kecamatan Pantai Labu masih rendah, miskin, produktivitas sangat rendah sebagai indikasi adanya tekanan yang berat, dan ekosistem tidak stabil. Spesies mangrove yang terdapat di Kecamatan Pantai Labu meliputi Avicennia sp (api-api), Rhizophora sp (bakau), Sonneratia sp (pedada), Bruguira sp, dan Xylocerpus sp (nyirih). Persebaran dan agihan ekosistem mangrove di Kecamatan Pantai Labu berada di sepanjang tepi pesisir yang meliputi Desa Sungai Tuan dengan luas 128,58 ha, Desa Bagan Serdang dengan luas 78,75 ha, Desa Regemuk dengan luas 33,50 ha, Desa Pantai Labu Pekan dengan luas 15,85 ha, Desa Paluh Sebaji dengan luas 73,48 ha, dan Desa Denai Kuala dengan luas 187,79 ha. Kata Kunci: ekosistem mangrove, wilayah kepesisiran, Google Eart

Analisis Penerapan Case Method dan Team Based Project Dalam Kebijakan Jurusan di Universitas Negeri Medan

Pembelajaran case method dan team-based merupakan salah satu Indikator Kinerja Utama (IKU) yang diterapkan oleh Kementerian Pendidikan dan Kebudayaan Republik Indonesia nomor 3/M/2021. Pembalajaran case method dan team-based adalah pembelajaran yang dibebankan kepada mahasiswa untuk meningkatkan kemampuan berpikir kritis (critical thinking) mahasiswa, memecahkan masalah, mencari solusi, dan menumbuhkan kemampuan berkomunikasi. Pembelajaran ini juga bermanfaat untuk dosen sebagai tenaga pengajar untuk meningkatkan kemampuan dan keterampilan yang lebih tinggi. Penelitian ini bertujuan untuk mengetahui tingkat ketercapaian penerapan case method dan team-based project dalam pembelajaran berdasarkan kebijakan Jurusan. Penelitian ini menggunakan merupakan penelitian pendekatan deskriptif kualitatif. Populasi dalam penelitian Populasi dalam penelitian ini adalah seluruh mahasiswa Jurusan Pendidikan Geografi angkatan 2020-2022 berjumlah 454 dan sampe penelitian sebenyak 215 mahasiswa. Pengumpulan data menggunakan kuisioner (angket) yang disebarkan kepada mahasiswa melalui google form. Hasil penelitian yaitu implementasi case method dan team-based di Jurusan Pendidikan Geografi masih belum berjalan secara maksimal, hal ini dikarenakan beberapa faktor yaitu kurangnya pemahaman mahasiswa dalam tujuan penerapan penugasan case method dan team-based, langkah-langkah penugasan case method dan team-based yang dilampirkan dalam Rencana Pembelajaran Semester (RPS) masih belum jelas, dan kurangnya partisipasi mahasiswa dalam penugasan case method dan team-based.  Kebijakan Jurusan dalam penerapan case mmethod dan team-based project masih belum efektif dikarenakan mahasiswa masih belum mengetahui tujuan dan manfaat dalam penerapan case method dan team-based project

Pengaruh Konsentrasi Sublethal Diazinon 60 EC Terhadap Udang Windu (Penaeus monodbn Fab.) Stadia Pasca Larva

ENI YUNIASTUTI. J 201 92 0746. Pengaruh Konsentrasi Sublethal Diazinon 60 EC Terhadap Udang Windu (Penaeus monodbn Fab.) Stadia Pasca Larva (dibawah bimbingan Hendarko Sugondo dan Jafron Wasicallidayat). Insektisida diazinon 60 EC sangat potensial mencemari perairan dan banyak digunakan di area pertanian dewasa ini. Penggunaan insektisida ini dapat membahayakan kehidupan organisme perairan seperti udang windu (Penaeus monodon Fab.) Penelitian ini bertujuan untuk mengetahui nilai LC 50-96 jam diazinon 60 EC, engetahui dan mengkaji pengaruh konsentrasi sublethal diazinon 60 EC terhadap pertumbuhan dan perbedaan konsumsi pakan udang windu stadia pasca larva. Metode penelitian menggunakan metode "bioassay" statis, meliputi 3 tahapan, yaitu : penentuan batas konsentrasi ambang, penentuan konsentrasi LC 50-96 jam dan penentuan konsentrasi sublethal. Rancangan yang digunakan adalah Rancangan Acak Lengkap dengan perlakuan 6 konsentrasi diazinon 60 EC dan dilakukan dengan 3 kali ulangan. Hasil pengujian menunjukkan bahwa nilai batas konsentrasi ambang diazinon 60 EC terhadap udang windu stadia pasca larva adalah 10-5-10-2 ppm, dan nilai konsentrasi LC 50-96 jam sebesar 6,4 x 10-4 ppm. Adapun konsentrasi sublethal yang diperlakukan adalah (3,2 x 10-5 ppm), (6,4 x 10-5 ppm), (9,6 x 10-5 ppm), (1,28 x 10-4 ppm), (1,6 x 10-4 ppm). Konsentrasi sublethal tersebut telah menghambat pertumbuhan, serta mengurangi konsumsi pakan udang windu stadia pasca larva. The Effect of Diazinon 60 EC Sublethal Concentration On The Penaeid Shrimp (Penaeus monodon Fab.) Pasca Larvae Phase (Hendarko Sugondo and Jafron Wasiq Hidayat). Diazinon 60 EC Insenticide is very potential to pollute the aquatic ecosystem. Mostly applied in agriculture areas in this time. This utilization of insecticide can endanger to aquatic organism such as Penaeus monodon. This research is purpose to know the lethal concentration (LC) 50-96 hours of diazinon 60 EC, to observe the effect of diazinon 60 EC sublethal concentration on the growth, and difference feeding consumption. Research is done by bioassay static method, consist of 3 step : namely, i.e threshold concentration limit, LC 50-96 hours concentration and sublethal concentration. Research design is Complete Randomiz-d Design of 6 treatment of diazinon 60 EC concentration and undertaken on three repetitions. As a result, threshold concentration limit of diazinon 60 EC on the Penaeus monodon pasca larvae phase is 10-5-10-2 ppm. Effective concentration (LC 50-96 hours is 6,4 x 10-4 ppm. The sublethal concentration can applied are (3,2 x 10-5 Pipm), (6,4 x 10-5 ppm), (9,6 x 10-5 ppm), (1,28 x 10-4 ppm), (1,6 x 10-4 ppm). That sublethal concentration have inhibition growth and decrease feeding consumption of Penaeid shrimp pasca larvae phase

STRATEGI PENGELOLAAN EKOSISTEM MANGROVE MENGGUNAKAN CITRA MULTITEMPORAL DI ZONA KEPESISIRAN DEMAK

The research was carried out in the coastal zone of Demak, Central Java Province. The research objectives were (1) to map existing condition of mangrove area and its changes in the coastal zone of Demak, (2) to describe the requirements of growth and development of mangrove ecosystems in the coastal zone of Demak which should be prioritized in treatment, (3) to determine the areas that should be a top priority in rehabilitation of mangrove ecosystems in the coastal zone of Demak, and (4) to determine the management strategy of mangrove ecosystem in the coastal zone of Demak. This research used a survey method. The data collection used sampling and the analysis data used qualitative analysis. The population is the overall of Demak coastal zone that consist of the land physical characteristics and the community characteristic. The sampling techniques of the land physical characteristics used purposive sampling method. While the sampling techniques of the community characteristics used simple random sampling method to determine the respondent. There are several kinds of data collection techniques that used in this research, namely: interpretation of multitemporal satellite imagery, map interpretation, analysis of secondary data, field observations and interviews. The variables of this research include physical factors, factors of community characteristics and vegetation factors. The techniques of data analysis applied Geographic Information System analysis which includes buffer analysis, scoring analysis and overlay analysis. The results show that the mangrove ecosystems in Demak coastal zone are 1,979.58 ha in 1994, 1,077.28 ha in 2002 and 1,159.23 ha in 2010. The requirements of mangrove growth and development of mangrove ecosystems in Demak coastal zone consist of: (1) marine landform, (2) rainfall 1000 � 3000 mm/year, (3) average salinity <0.01 � 33�, (4) water temperature 25�C � 33.3�C, (5) the soil substrates of silt and clay, (6) the soil texture of silty clay, (7) tidal range <2 m, (8) inundation height <2 m, and (9) land use of fish ponds and salt ponds. The priority areas of mangrove rehabilitation program in Demak coastal zone consists of: (1) the first priority occupy in Wedung Subdistrict, in greenbelt area that has not planted mangroves and in the very potential land for mangrove ecosyste

The Impact of Mangrove Restoration on the Social Economy of the Community of Batu Panjang Village, Rupat Island, Riau Province: english

Mangrove restoration is an effort to restore degraded mangrove ecosystems with the aim of increasing environmental sustainability, biodiversity conservation and providing social and economic benefits for the community. This research aims to determine the extent to which mangrove restoration can influence the socio-economic life of the community in Batu Panjang Village, Bengkalis Regency. The research method used is descriptive qualitative by systematically analyzing and processing data based on the results of observations and interviews with farmer groups, village officials and stakeholders in Batu Panjang Village. The results of this research show that restoration activities provide (1) a positive impact on increasing community knowledge and understanding regarding the function and role of mangroves in coastal area conservation efforts, (2) community empowerment has been carried out by forming a farmer group, namely the Jeram Batu Panjang (JBP) group and the STYA group which plays a role from the land clearing stage, to the planting stage, (3) but has not yet provided/shown a significant impact in increasing income which will affect the social and economic conditions of the community in Batu Panjang Village, Rupat District. This is shown by the research results that the income earned by the community from mangrove restoration activities from the land clearing stage to the planting stage is only around IDR 475,000 on average, still far below the Bengkalis Regency Minimum Wage of IDR 3,599,029.72

Threats to Mangrove Ecosystems and Their Impact on Coastal Biodiversity: A Study on Mangrove Management in Langsa City

The coastal area is a complex and interconnected system of diverse ecosystems, with mangrove ecosystems standing out as one of the most productive. However, global mangrove ecosystems, including those in Langsa City, face multiple threats from human activities and natural hazards. This study focuses on examining the various threats impacting the mangrove ecosystem in Langsa City, including tourism and urban development, climate change, regional development, human activities, and sedimentation. Mangrove ecosystems have specific requirements for survival, making these threats particularly concerning. Through field observations and analysis, this study explores the impact of these threats on the mangrove ecosystem's well-being and its correlation with the overall coastal biodiversity. Additionally, the research delves into the management practices implemented by the local government to preserve the mangrove ecosystems. The findings reveal the severity of threats to the mangrove ecosystem's viability and its implications for coastal biodiversity sustainability. The study also sheds light on the local government's mangrove management system, providing valuable insights into current conservation efforts. By understanding the threats faced by the mangrove ecosystem and the management practices in place, this research contributes to the preservation and sustainable use of this vital coastal resource