ACACIA (Acacia nilotica (L) Willd. Ex Del.) INSECT DIVERSITY IN SAVANA OF BALURAN NATIONAL PARK SITUBONDO, EAST JAVA

• Main Author: Bahri, Saiful
• Format: Theses
• Language: Indonesia
• Subjects: Ilmu hayati ; Biologi
• Online Access: https://digilib.itb.ac.id/gdl/view/37017
• Institution: Institut Teknologi Bandung

Baluran National Park (BNP) has a function as a place for field studies and ecology recreation. Bekol savanna park is a part of the BNP is needed to be protected from the threat of invasion by acacia (Acacia nilotica). Due to the development and growth of A. nilotica plants is very rapid and damage, these plants need to be controlled. Control is usually doing by mechanics, chemistry and biology, however such controls do not provide effective results. Diversity of insect has a wide range of interactions with A. nilotica plants. Insects that negative interact with A.nilotica like herbivory have possibilities can be developed and recommended to become one of the agents biological control A. nilotica. The purpose of this study was to determine the level of presence, abundance, interaction and insects that can be recommended as biological control agent of A. nilotica plant in Bekol savanna park. Field research was conducted from June to July 2015 in Bekol savanna of Baluran National Park. The method used in this research is with make four plot 20 m x 20 m each size and using 25 traps in each plot. Insect collection is done every two days (Monday, Wednesday and Saturday) for four weeks. Insect identification conducted in the Laboratory of Entomology Sith, ITB and be confirmed by the Laboratory of Zoology LIPI Cibinong. Data analysis using the Shannon index (H), Simpson's index (D) and ANOVA test. insects succesful were collected a number of 527 individual. Insect identification results obtained consists of Coleoptera, Diptera, Hemiptera, Hymenoptera and Orthoptera. Diversity index in plot I = 2.04208, plot II = 1.73186, plot III = 2.29266, and plot IV = 2.07843, it is indicates that the diversity index is low on plot II and medium in the plot I, III and IV. Dominance index in plot I= 0,247, plot II= 0,401, plot III= 0,225 and plot IV= 0,202, it is indicate that nothing insect species have dominance in each plots. Abundance of insects was observed that the Formicidae family are insects most much in each plot with species of Polyrhachis sp = 45.775% plot I, Crematogaster sp = 62.281% plot II, Crematogaster sp = 45.455% plot III and Crematogaster sp = 38.679% plot IV, ANOVA analysis showed that there was no significant difference between the types of insects in a plot with each other. The interaction that occurs is a negative interaction insect Coleoptera, Hemiptera and Orthoptera with A. nilotica plants, positive interaction between the insect Hemiptera and Hymenoptera with A. nilotica plants and nothing direct interactions between insect of the Diptera order with A. nilotica plants. C. serattus and Z. compressicornis more likely to be developed into biological control agent of A. nilotica plant. Diversity of insects is moderate with the Formicidae family were abundant and there are positive and negative interactions of insects, the insects C. serattus and Z. Compressicornis possess possibility to recommended as a biological control agent of A. nilotica plant.