The Arboretum City Forest is located in Cibubur, East Jakarta, in this area there is biodiversity, one of which is butterflies. Butterflies act as an indicator of environmental change, in a habitat. There are two types of habitats in this urban forest, open and closed habitats, which greatly affect the diversity of butterflies. This study aims to determine the diversity of butterflies in the two habitats. The research was conducted in May 2021. The method used was a quantitative descriptive method, and the plot was carried out by purposive sampling. The study was carried out 4 times in each habitat (3 plots), with an interval of 1 week of observation. The research was conducted from 08:30 to 12:30, using insect nets and digital cameras. The number of butterflies found in open habitats was more (39 species, 177 individuals) than in closed habitats (25 species. 94 individuals). Based on, and the diversity of butterflies found shows a significant correlation with habitat conditions. In open forest habitats it is more suitable for butterflies. This difference is strongly influenced by the environmental conditions of the habitat, especially light, and plant diversity.
Giam Siak Kecil Bukit Batu is a biosphere reserve which one of its functions is as a habitat for wildlife. However, biodiversity data in the Giam Siak Kecil Bukit Batu Biosphere Reserve (GSKBB-BR) is still very minimal, including insects (Coleoptera and Hemiptera). This research was conducted to determine the diversity of Coleoptera and Hemiptera in the GSKBB Biosphere Reserve, Riau, Indonesia. The research was carried out using an exploratory method using "lights trap". The results of the study found 30 species, from 11 families of the order Coleoptera (23 species) and Hemiptera (7 species) in the GSKBB-BR. The diversity index of Coleoptera and Hemiptera at the observation site was moderate (H = 2.73), with a high evenness index (0.80). Scarabaeidae (order Coleoptera) is the family with the highest number of species found (8 species), while the most abundant species were Tibicen linnei and Pomponia fusca (Cicadidae/Hemiptera). Based on their functional roles, Coleoptera and Hemiptera with the highest number are herbivores (17 species), followed by predators (7 species) and decomposers (3 species). The range of values for temperature and humidity at the research site are in normal conditions. The GSKBB-BR area is an important remaining habitat for wildlife in Riau, including various types of insects (Coleoptera and Hemiptera); whose potential still needs to be revealed, and must be managed properly.
Research related to biodiversity that was carried out regularly could be part of monitoring activities to see changes in butterfly populations in an area. Butterflies have a role as environmental bioindicators that were commonly found in various places. Urban forests such as the Cibubur Arboretum and the University of Indonesia were mini conservation sites that were habitats for butterflies. The purpose of this study was to monitor changes in butterfly abundance in the urban forest of Cibubur Arboretum and UI. This research was conducted in 2014 and 2021. This observation was carried out by purposive sampling method. Each urban forest was divided into 3 different stations consisting of 2 plots (20 x 20 m), and repeated 3 times on each plot with an interval of 1 week using a sweeping net and camera. Observations were carried out for 1 hour on each plots. The total observations of butterflies in both urban forests were 18 times. Individual butterflies found in 2014 in the Urban Forest Arboretum Cibubur (339) individuals, and the year 2021 (232) individuals. in the UI City Forest in 2014 898 individuals were found and 269 individuals in 2021. Nymphalidae family was the family with the highest number of individuals found in 2014 and 2021. The individual species found in 2014, included in the category of sporadic, subrecedent, recedent, subdominant and dominant. Meanwhile, the butterfly species found at the study site were categorized into Sub-recedent, Recedent, and Sub-dominant groups in 2021. Differences in vegetation, changes in use, and anthropogenic disturbances could affect changes in butterfly observations.
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