Vegetation Analysis and Diversity of Seed Plants (Spermatophyta) in the Area Around Porok Beach, Yogyakarta Rizhal Hendi Ristanto 1,a), Khalida Zia 2),Helda Dumayanti 3,b), Clavinzky Anggita Pasaribu 4) and Mieke Miarsyah5)
12345) Department of Biology Education, Faculty of Mathematics and Sciences State University of Jakarta, Indonesia
a) Corresponding author: rizhalhendi[at]unj.ac.id
b)heldadumayanti[at]gmail.com
Abstract
Seed plants (Spermatophyta) as biodiversity need to be preserved because they have many benefits. This study aims to determine the analysis of vegetation & diversity of seed plants (Spermatophyta) in the Porok Beach Forest, Yogyakarta. The research method used is a survey method by direct observation and quantitative descriptive of the vegetation area. The research instrument is in the form of observation sheets for the analysis of vegetation and diversity of seed plants (Spermatophyta). The population in this study is all seed plants (Spermatophyta) found in the Porok Beach Forest, Yogyakarta. The sample in this study is seed plants (Spermatophyta) with tree habitus, taken by purposive sampling on a quadratic transect. This type of research is used in line transect and quadratic transect methods. The research design is made with a 70 m long transect line in the tree vegetation area. On the transect line, 3 plots/square are made with a plot size of 10 m x 10 m and a distance between plots of 10 m. Each plot/square was repeated 3 times, so there were 9 plots/square. Vegetation analysis is carried out by calculating Important Value Index (INP), Shannon-Wienner diversity index (H^), and environmental parameters. Based on the results of research on seed plants (Spermatophyta) that has been carried out in the area around Porok Beach, Yogyakarta with tree habitus found as many as 5 families, 5 species and 33 individuals. There were 5 (five) types of vegetation composition, namely Casuarina equisetifolia (Cemara Udang), Terminalia catappa (Ketapang), Pandanus odorifer (Sea pandanus), Cocos nucifera (Coconut) and Phempis acidula (Stigi). The species diversity in the area around Porok Beach, Yogyakarta is classified as moderate, namely 1.49 which has a diversity index of 1 < H^ 3 where the diversity index is moderate.
Keywords: Vegetation Analysis, Diversity, Porok Beach, Seed Plants
