Community Structure Of Coral Reefs In Saebus Island, Sumenep District, East Java

¹ UKSA-387 Diving Club Diponegoro University, 50275 Jl. Prof. Soedarto SH, Tembalang Campus, Semarang, Indonesia
² Faculty of Fisheries and Marine Science, Diponegoro University, 50275 Jl. Prof. Soedarto SH, Tembalang Campus, Semarang, Indonesia
³ Faculty of Engineering, Diponegoro University, 50275 Jl. Prof. Soedarto SH, Tembalang Campus, Semarang, Indonesia
⁴ Coastal Disaster Rehabilitation and Mitigation Center, Integrated Laboratory, Diponegoro University, 50275 Jl. Prof. H. Soedarto, SH, Tembalang, Semarang, Indonesia

^* Corresponding author: madarizmaadi95@gmail.com

Abstract

Increasing degradation coral reefs ecosystem has created many concerns. Reduction of this damage can only be done with good and proper management of coral reef ecosystem based on existing condition. The condition of coral reef ecosystem can be determined by assessing its community structure. This study investigates community structure of coral reef ecosystems around Saebus Island, Sumenep District, East Java, by using satellite imagery analysis and field observations. Satellite imagery analysis by Lyzenga methods was used to determine the observation stations and substrate distribution. Field observations were done by using Line Intercept Transect method at 4 stations, at the depth of 3 and 10 meters. The results showed that the percentage of coral reef coverage at the depth of 3 and 10 meters were 64.36% and 59.29%, respectively, and included in fine coverage category. This study found in total 25 genera from 13 families of corals at all stations. The most common species found were Acropora, Porites, and Pocillopora, while the least common species were Favites and Montastrea. Average value of Diversity, Uniformity and Dominancy indices were 2.94, 0.8 and 0.18 which include as medium, high, and low category, respectively. These results suggest that coral reef ecosystems around Saebus Island is in a good condition.