ANALYSIS OF ECOLOGY INDEX OF DEMOSPONGIA CLASS (SPONS) IN LITORAL ZONE OF CIKABODASAN BEACH OF SANCANG SEA NATURE RESERVE GARUT DISTRICT D Hernawati, I Al-jawami, K R Permana, S Mulyaningsih And S Nurkamilah
Prodi Pendidikan Biologi, Institut Pendidikan Indonesia, Garut 44151, Jawa Barat
Abstract
This research aims to determine the Ecological Index of Demospongia Classes (Sponges) in the Litoral Zone of Cikabodasan Beach, Sancang Marine Nature Reserve. The method used in this Reasearch is descriptive method with quantitative approach and sampling using purposive sampling techniques assisted with line transects and quadrate transects in identifying species from the Demospongia Class. The sampling process was carried out by dividing the study site into three observation stations with a distance between stations 92 m. Each station consists of three line transects with a length of 100 m with a distance between the line transects 42 m. Each transect line is placed 10 transect squares with a size of 1x1m. Based on the results of the reasearch, Demospongia class species were sampled as many 12 species with total of 272 individuals. The highes tecological index values were found in aply sinaaerophoba species with diversity index value of 0.3465, abundance index of 0.7556, evenness index of 0.1395, and dominance index of 0.0625. The lowes tecological index values are found in Haliclonacinereaand Plakortissp with diversity index valueof 0.00497, abundance index of 0.0333, evenness index of 0.0200, and dominance index of 0.0001 in each species
