Association Study of Various Types of Epiphyte Fern with Host Tree in Srengseng City Forest Eka Putri Azrai1*, Mieke Miarsyah, Kharisma Widarsih, Afrilisa Nur Rosifa Gusverizon, Sayyid Izzuddin Muslimin, Yodellia Syahrani, Rojak2
1. Biology Education, Faculty of Mathematics and Science, Universitas Negeri Jakarta, Jl. Rawamangun Muka Raya No. 11, East Jakarta 13220, DKI Jakarta, Indonesia
2. Srengseng City Forest, Jl. H. Kelik, West Jakarta 11630, DKI Jakarta, Indonesia
A vegetation is formed by the presence and interaction of several types of plants, one of them is association. The aim of this study is to analyze the types and levels of association among 5 epiphytic ferns species and their host in Srengseng City Forest, Jakarta. Method used was survey method with purposive sampling technique. The data collected were the number of individuals of 5 epiphytic ferns, the number of individuals and types of host trees. Measurements of light intensity, air temperature, and humidity were also carried out as supporting data. The association type was identified using 2 x 2 contingency tables by compared observation value (a) toward expectation value E (a). The association levels were identified using Jaccard Index and Dice Index. The results showed that association types between epiphytic ferns and host trees was 71.79% was positively and 28.21% was negatively. Research indicate that association levels of epiphytes fern with host were variously from low to high. Highest association occurred between Drynaria quercifolia with Leucaena pulverulenta and Pyrrosia piloselloides with Leucaena pulverulenta. Factors affected the association are the distribution of the host tree, allelopathy, bark texture and hardness, and the canopy of the host tree.
Keywords: Association Type, Association Level, Epiphyte Fern, Host Tree, Srengseng City Forest
