STRUKTUR DAN KERAGAMAN HUTAN TANAMAN CAMPURAN DI TAMAN HUTAN HUJAN TROPIS INDONESIA (TH2TI) KOTA BANJARBARU

Forest structure is the distribution of individual plants and layers of the forest canopy, which means that forest structure is useful for the distribution of trees per unit area in various diameter classes. The diversity index can be interpreted as a mathematical representation of the number of types of organisms in a population. This index makes it easy to analyze information about the number of individuals and types of organisms. The purpose of this study was to analyze the structure, dominance, and diversity of mixed plantation forests in the Indonesian Tropical Rainforest Park (TH2TI) area of Banjarbaru City. The method used in this study is the sampling method with a circle plot model. To observe the regeneration of seedlings, saplings, poles, and trees. The forest structure was analyzed by the distribution of diameter classes, dominance was analyzed by the important value index, and diversity was analyzed by Shannon's diversity index. The results showed that the structure and diversity of mixed forest in the Indonesian Tropical Rainforest Park (TH2TI) of Banjarbaru City, the forest structure in the TH2TI area horizontally/based on diameter, there are 8 classes, namely, 0 cm to 36 cm. The forest structure in the TH2TI area has formed a normal curve in accordance with the bell-shaped plantation forest. Jabon species dominates the level of seedling and sapling regeneration, sengon species dominates the level of pole and tree regeneration. The species diversity index (H’) of the forest in the TH2TI area is classified as medium to low