Abstract
Hoya is a tropical flowering plant that has great potential as an export commodity. It needs to be cultivated to ensure its sustainability in nature. Information about the suitable habitat of Hoya was not widely known yet. This study aimed to compare the habitat characteristics of several species of Hoya. The research was conducted by exploring the sample plots determined by purposive sampling based on the differences of habitat characteristics. The biotic components observed were phorophyte species type and the number of individual of each Hoya species. The abiotic components measured in each plot were altitude and geographical position, air temperature, humidity, light intensity, wind speed, and canopy cover. Hoya ‘s diversity was analyzed using the Shannon Winner Index. Environmental factor data and biotic factors were analyzed with Canoco for Windows 4.5 software. There were 6 species of Hoya namely Hoya multiflora, Hoya imperialis, Hoya vitellinoides, Hoya hasseltii, Hoya campanulata and Hoya lacunosa found in this study. The highest biodiversity index was obtained in an altitude of 700-800 m.a.s.l (H’=1.41) and in hillsides area (H’=1.3). Hoya ‘s most frequent phorophyte was Schima wallichii. Factors affecting the presence of Hoya in the phorophytes were the position of attachment to the main stem and the rough surface characteristics of the tree. Hoya ‘s preference place was on the bark fracture. Abiotic factors that most influencing the existence of Hoya were air humidity and canopy cover. The data of this research can be used as basic information for carried out the conservation efforts and cultivation strategy in the future.
Highlights
Indonesia is a tropical country, endowed with high floral diversity, including Hoya from the family of Apocynaceae and sub family Asclepiadoideae (Endress et al, 2014)
The result of this study indicated that there were 6 species of Hoya i.e. Hoya campanulata, H. hasseltii, H. multiflora, H. lacunosa, H. vitellinoides, and H. imperialis (Figure 1 and 2) were found in this study
Rahayu (2012), stated that the number of Hoya species in Gunung Gede Pangrango was many as 8 species
Summary
Indonesia is a tropical country, endowed with high floral diversity, including Hoya from the family of Apocynaceae and sub family Asclepiadoideae (Endress et al, 2014). Hoya plant flourish best in enough light and humid air (Hansen et al, 2007), some is found along rivers and lakes (Rahayu, 2010). Hoya is used as cosmetics and medicinal plant, it is potential to be developed as an ornamental plant, and has a high economical value (Rahayu, 2011). Hoya is popular among the public as an ornamental plant. Many websites and social media groups have been established for Hoya lovers (Rahayu, 2018). The popularity and potential of Hoya began to be developed in some countries including in Indonesia through exploration, research, and cultivation
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