Judul: Pemetaan Kerentanan Wilayah Pesisir di Desa Sekotong Barat, Kabupaten Lombok Barat
Abstrak: Daerah pesisir adalah kawasan peralihan yang menghubungkan ekosistem darat dan ekosistem laut. Berbagai aktivitas dan fenomena yang terjadi di darat maupun di laut menyebabkan tekanan terhadap wilayah pesisir. Perlu adanya penilaian untuk mencegah dampak seperti salah satunya adalah bencana abrasi dari tekanan aktivitas dan fenomena yang terjadi di darat dan dilaut. Penelitian ini bertujuan untuk menentukan dan memetakan tingkat kerentanan wilayah pesisir di Pesisir Desa Sekotong Barat, Lombok Barat dengan menggunakan metode Coastal Vulnerability Index (CVI). Penelitian ini dilaksanakan pada bulan Februari 2023 – Desember 2023 di Desa Sekotong Barat, Kabupaten Lombok Barat, Provinsi Nusa Tenggara Barat, dengan metode overlay dan rangking berdasarkan matriks CVI. Parameter yang menyebabkan terjadinya kerentanan pesisir adalah geomorfologi lahan, kemiringan lahan, pasang surut, perubahan garis pantai, tinggi gelombang, dan kenaikan muka air laut. Tingkat kerentanan wilayah pesisir di Desa Sekotong Barat dikategorikan dalam sangat rendah, rendah, sedang, tinggi, dan sangat tinggi. Kerentanan pesisir dengan nilai sangat tinggi di 2 segmen stasiun pengamatan yaitu SK3 dan SK4, lalu kerentanan pesisir dengan nilai tinggi ditemukan pada 2 segmen stasiun pengamatan yaitu SK7 dan SK8, selain itu terdapat kerentanan pesisir dengan nilai rendah di 2 segmen stasiun pengamatan yaitu SK1 dan SK2, dan kerentanan dengan nilai sangat rendah mendominasi wilayah ini dengan 3 segmen stasiun pengamatan yaitu di SK5, SK6 dan SK 9., The coastal area serves as a transitional zone connecting terrestrial and marine ecosystems. Various activities and phenomena occurring on land and at sea exerted pressure on coastal regions, leading to potential threats such as abrasion disasters. Sekotong Barat Village is one of the coastal areas in Indonesia that was susceptible to this threat. An assessment was conducted to prevent and mitigate the impacts of these threats. The research aimed to determine and map the vulnerability level of the coastal area in Sekotong Barat Village, Lombok Barat, using the Coastal Vulnerability Index (CVI) method. The study took place from February 2023 to December 2023 in Sekotong Barat Village, Lombok Barat Regency, Nusa Tenggara Barat Province. The overlay method and ranking based on the CVI matrix were employed in the assessment. Parameters contributing to coastal vulnerability included land geomorphology, land slope, tidal range, shoreline changes, wave height, and sea level rise. The coastal vulnerability levels in Sekotong Barat Village were categorized as very low, low, moderate, high, and very high. Coastal vulnerability with a very high value was identified at two observation station segments, namely SK3 and SK4, while coastal vulnerability with a high value was observed at two observation station segments, SK7 and SK8. Furthermore, coastal vulnerability with a low value was present in two observation station segments, namely SK1 and SK2, while coastal vulnerability with a very low value dominated this area with three observation station segments at SK5, SK6, and SK9.
Keyword: ancaman, CVI, kerentanan, pesisir, Sekotong Barat, coastal, threats, vulnerability

Judul: Analysis of the Vulnerability of Beaches andSites in East Belitung to Sea Level Rise.
Abstrak: Kerentanan pantai mencerminkan ancaman terhadap wilayah pesisir karena faktor alam dan manusia yang berpotensi merusak warisan budaya pesisir. Informasi spasial terkait kerentanan pantai dan situs penting diteliti untuk mengurangi risiko terhadap potensi kerusakan. Penelitian ini bertujuan memetakan kerentanan pesisir dan situs di Belitung Timuinr. Metode yang digunakan adalah Coastal Vulnerability Index (CVI), Shoreline Vulnerability (SV), dan Cultural Resource Vulnerability (CRV). Metode ini melibatkan observasi langsung dan analisis spasial dengan mempertimbangkan parameter fisik seperti geomorfologi, elevasi, pasang surut, tinggi gelombang, perubahan garis pantai, kenaikan permukaan air laut, slope, tutupan lahan, dan jarak ke garis pantai. Sebagian besar pantai dari Desa Mengkubang hingga Gantung memiliki tingkat kerentanan Pantai yang tinggi. Luasan wilayah dengan tingkat kerentanan Pantai rendah, tinggi, dan sangat tinggi berturut-turut adalah 1679 Ha, 2891.83 Ha, dan 1526.65 Ha. Evaluasi kerentanan situs menunjukkan bahwa 26.67% kilang minyak tergolong sangat rentan, 26.67% rentan tinggi, 20% rentan sedang, dan 26.67% rentan rendah., Coastal vulnerability reflects threats to coastal areas due to natural and human factors that have the potential to damage coastal cultural heritage. Spatial information related to coastal and site vulnerability is important to research to reduce the risk of potential damage. This research aims to map the vulnerability of coastal and cultural sites in East Belitung. The methods used are the Coastal Vulnerability Index (CVI), Shoreline Vulnerability (SV), and Cultural Resource Vulnerability (CRV). The method involves direct observation and spatial analysis by considering geomorphology, elevation, tides, wave height, shoreline change, sea level rise, slope, land cover, and distance to the shoreline. Most of the coast from Mengkubang Village to Gantung has high vulnerability. The areas with low, high, and very high levels of coastal vulnerability are 1679 hectares, 2891.83 hectares, and 1526.65 hectares, respectively. The site vulnerability evaluation showed that 26.67% of the oil refineries were classified as highly vulnerable, 26.67% as highly vulnerable, 20% as moderately vulnerable, and 26.67% as low vulnerable.
Keyword: Coastal Vulnerability Index, Cultural Resource Vulnerability, Kerentanan Pantai, Kerentanan Situs

Judul: Pembentukan Tanaman Haploid Ganda dengan Perlakuan Oryzalin Secara In Vitro pada Biji Jagung (Zea mays) Diduga Haploid
Abstrak: BC2 maize purple kernels estimated haploid were resulted from a cross between Bisma variety with haploid inducer line (3490) by backcross. Chromosome doubling to these kernels was done to produce doubled haploid plants (pure lines). This study was conducted to get an in vitro diploidisation method by oryzalin treatment as a chromosome doubling agent, with concentration of 0, 5, 10, and 15 mM for 24 hours on seeds and root of seedlings. Chromosome analysis on the control of purple kernels showed 66.7% of the seeds was haploid and 33.3% was diploid. Oryzalin treatment affected in doubling the chromosome number from haploid to doubled haploid or from diploid to tetraploid. The higher concentration of oryzalin increased the opportunity of chromosome doubling, but increased death rate. Combination of treatment that is most efficient was 5 mM oryzalin on seedling roots that produced the highest number of doubled haploid plants was found by 71.4% with a low mortality rate by 30%. Increasing of the chromosome number caused the growth of the longer canopy length and more number of leaves and the lower stomata density.
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