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: Analisis Kerentanan Pantai Menggunakan Pendekatan Coastal  Vulnerability Index (CVI)
Abstrak: Kerentanan pantai merupakan kondisi suatu wilayah pantai yang mengalami kerusakan dan ancaman bahaya yang disebabkan oleh faktor alam maupun antropogenik. Wilayah pantai memerlukan informasi spasial terkait tingkat kerentanan pantai upaya mengurangi risiko terhadap ancaman kerusakan. Penelitian ini bertujuan untuk menganalisis kerentanan pantai di Kecamatan Mirit, Grabag, Ngombol, Purwodadi, Temon, dan Wates menggunakan pendekatan Coastal Vulnerability Index (CVI). Metode yang digunakan adalah pengamatan secara langsung dan pengolahan data dalam Sistem Informasi Geografis (SIG). Parameter yang digunakan dalam analisis yaitu geomorfologi, elevasi, pasang surut, tinggi gelombang, perubahan garis pantai, dan kenaikan muka laut. Analisis tingkat kerentanan dikategorikan dalam sangat rendah, rendah, sedang, tinggi dan sangat tinggi. Hasil penelitian menunjukkan bahwa pantai Kecamatan Wates hingga Mirit didominasi oleh kerentanan tinggi. Wilayah pantai yang termasuk kategori kerentanan sangat rendah sepanjang 2 km, kategori kerentanan rendah sepanjang 1 km, kategori kerentanan tinggi sepanjang 27 km, dan kategori kerentanan sangat tinggi sepanjang 13 km., Coastal vulnerability is the condition of a coastal area that is damaged and threatened by hazards caused by natural and anthropogenic factors. Coastal areas require spatial information related to the level of coastal vulnerability to reduce the risk of the threat of damage. This study aims to analyze coastal vulnerability in Mirit, Grabag, Ngombol, Purwodadi, Temon, and Wates using the Coastal Vulnerability Index (CVI) approach. The method used is direct observation and data processing in Geographic Information Systems (GIS). The parameters used in the analysis are geomorphology, elevation, tides, wave height, shoreline changes, and sea level rise. Analysis of the level of vulnerability is categorized into very low, low, medium, high, and very high. The results showed that the coasts of the Wates to Mirit sub-districts were dominated by high vulnerability. Coastal areas that are included in the very low vulnerability category along 2 km, the low vulnerability category along 1 km, the high vulnerability category along 27 km, and the very high vulnerability category along 13 km.
Keyword: coastal, CVI, GIS, vulnerability

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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