DIVERSITY OF ODONATA IN CILEUNYI HIGH-SPEED RAILWAY RICE FIELDS, BANDUNG, JAWA BARAT

• Main Author: Tasya Rizkita U, Shafina
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/69046
• Institution: Institut Teknologi Bandung

Rice fields in urban areas are decreasing due to the conversion of land into settlements, factories, toll roads, and high-speed train stations. Rice field ecosystem is a habitat for several types of insects. In the rice field ecosystem there are groups of insects including pests, natural enemy insects, and pollinators. One of the natural enemy insects that are often found in rice fields is the dragonfly (Odonata). The purpose of this study is to examine the diversity of dragonflies (Odonata) in the rice fields of Cileunyi, Bandung, West Java. This research was conducted in a rice field area which is 400 meters from the Cileunyi high-speed train station construction site, Bandung, West Java. Data collection was carried out from 26th February to 2nd April 2022 total of 16 times. Sampling time was carried out from 07.00 to 15.00 WIB. Dragonfly sampling was carried out using the field-by-field method using an insect net (sweeping net). The dragonfly samples obtained were then preserved for further identification based on their morphological characters. Environmental conditions such as temperature and humidity were measured using a sling psychrometer, and light intensity was measured using a lux meter total of 4 times per sampling period. The rainfall data obtained from the BMKG website. Based on the calculation of accumulated rainfall obtained from February-April 2022, it is in the range of 117,1-336,2 mm/month. Based in identification, there were 2 sub orders, namely Anisoptera and Zygoptera, 2 families, namely Libellulidae and Coenagrionidae, and 6 species, namely Orthetrum sabina, Crocothermis sp., Pantala flavescens, Diplacodes trivialis, Orthetrum testaceum, and Ischnura elegans with a total number of 4.585 dragonflies. Shannon Wiener diversity index value was 0,943, an evenness index of 0,526, and a dominance index of 0,455. Orthetrum sabina is a dragonfly species with the highest frequency of individual encounters.