Diversity of orchid species in the Kalaena Nature Reserve, Mangkutana District, East Luwu Regency

Orchid belongs to the Orchidaceae family which has ecological value as a habitat provider for animals such as ants and termites. Based on their habitus, orchids are classified into epiphytic and terrestrial orchids. This study aims to determine the diversity of orchid species in the Kalaena Nature Reserve, Mangkutana District, East Luwu Regency. Data collection was carried out for two months, from May to June 2021. This study used an analysis of the important value index, ecological index and environmental parameters. The results showed that there were 24 types of orchids consisting of 20 types of epiphytic orchids and 4 types of terrestrial orchids with a total number of 134 individuals. The highest INP value was Cymbidium finlaysonianum, which was 43.54 and the lowest was Taeniophyllum sp., which was 5.60. Based on the diversity index (H') is classified as moderate with a value of 2.37-2.38, the wealth index (R) is classified as low with a value of 1.79-1.97, the evenness index (E) is classified as low with a value of 0.88-0 .96, the dominance index (D) is low with a value of 0.09-0.13 and the highest similarity index (IS) is in lanes 2 and 3, namely 57%.