IDENTIFIKASI DAN KELIMPAHAN MAKROALGA DI PANTAI SELATAN GUNUNGKIDUL

Abstract

Gunungkidul is a southern area of Yogyakarta with a very wide row of beaches, one of which is Krakal Beach in Ngastirejo Village which is a beach with potential for flora and fauna, vertebrates and of course macroalgae. Macroalgae are large, low-lying plants. Macroalgae are taxonomically grouped into Thallophyta because their body consists of thallus. Abundance is the number of individuals who occupy a certain area or the number of individuals per unit volume area. This research is located on the South Coast of Gunungkidul by using three stations, namely Station 1 (Pantai Trenggole), Station 2 (Pantai Krakal), and Station 3 (Pantai Sepanjang), which was conducted for 5 days from 8-12 January 2020. Macroalgae data collection using transects lines with quadrant sampling. Each different type of macroalgae was sampled for species identification purposes. Water quality data collection was carried out in situ at each point of the study location. Macroalgae identification is presented in the form of descriptive analysis and graphs in presenting the diversity, uniformity, dominance and abundance of macroalgae on the South Coast of Gunungkidul. The results of the analysis at the three research stations on the South Coast of Gunungkidul found 9 species of macroalgae. The diversity index on the South Coast of Gunungkidul is in the low and medium categories. The uniformity index is in the low category and the dominance index is in the stable category. The abundance of macroalgae at Gunungkidul South Coast is Station 1 of 35.066 ind / m2, Station 2 of 39.8 ind / m2 and Station 3 of 30.166 ind / m2. The abundance of macroalgae on the South Coast is also influenced by water parameters such as temperature, salinity, DO, pH, currents and brightness