Orchid diversity in Bintan Island, Riau Islands

Abstract

Abstract. Hartini S. 2020. Orchid diversity in Bintan Island, Riau Islands. Pros Sem Nas Masy Biodiv Indon 6: 520-526. Bintan Island is one of the islands located in the Riau Islands Province. Bintan Island has several types of forest areas, namely Protection Forest, Catchment Area, Limited Production Forest, Conversion Forest and Mangrove Forest. On this island there are seven Protection Forests, of which only two of them are in good condition, namely Gunung Bintan Besar Protection Forest and Gunung Bintan Kecil Protection Forest. Orchids are plants that need to be known on this island, because data on the diversity of orchids on this island is still limited. Research on orchids on Bintan Island had been carried out in two locations, namely Gunung Bintan Besar Protection Forest in 2015 and Gunung Bintan Kecil Protection Forest in 2017. The research was conducted using purposive random sampling method. The number of orchids found in the Gunung Bintan Besar Protection Forest is far more than that found in the Gunung Bintan Kecil Protection Forest. 23 species consisting of 14 epiphytic orchids and nine terrestrial orchids were found in the Gunung Bintan Besar Protection Forest, while six species were found in the Gunung Bintan Kecil Protection Forest, consisting of two epiphytic orchids and four terrestrial orchids. Orchids found in both regions are Bromheadia finlaysoniana, Corymborkis veratrifolia, Spathoglottis plicata, Bulbophyllum gracillimum and Dendrobium crumenatum. There was one genus that was found in both locations, namely Neuwiedia, but the species were different. Neuwiedia zollingeri was found in the Gunung Bintan Besar Protection Forest, while Neuwiedia veratrifolia was found in the Gunung Bintan Kecil Protection Forest. Most of the orchids found in the Gunung Bintan Kecil Protection Forest were also found in the Gunung Bintan Besar Protection Forest.