This study aims to determine the genus of coral and coral diseases in the coral reef ecosystem of Tuan Island Peukan Bada, Aceh Besar District. The data of coral genera were gathered by using point intercept transect method, whereas, the data of coral diseases were gathered by using survey method. The data were identified by using handbook and then analyzed descriptively. The results showed that there were 5 coral genera found in Tuan Island Pekan Bada namely: Acropora, Montipora, Pocillopora, Porites, and Goniastrea. Meanwhile, coral diseases that are found in Tuan Island were ulcerative white spots, growth anomalies of an unknown cause, sediment damage, alga overgrowth, pink line disease dan pigmentation responses. The conclusion of this study were (1) the coral reefs that were found in Tuan Island Peukan Bada, Aceh Besar District consisted of 5 genera, and (2) coral diseases in Tuan Island consisted of 6 types of diseases.
Coral reefs are vulnerable ecosystems that can change over time due to natural factors. Bleaching is one of the natural phenomena that has an impact on coral ecosystems in Jaboi area of Weh Island, Sabang City, Indonesia. Therefore, the aim of the study is to measure the coral ecological conditions and recovery which includes coral cover, coral diversity, and recruitment in the waters of Jaboi, Weh Island. Benthic data collection used the Point Intercept Transect method, while coral recruitment data collection used the Belt Transect method. The level of diversity was measured based on an index from Shannon Wiener, then the coral recovery was calculated based on the percentage of coral cover and the number of juvenile corals. The result showed that the coral cover and diversity in Jaboi waters were in a moderate condition, with a cover score of 40% and the diversity of H = 1.4294. The coral recovery in Jaboi waters for the last nine years has decreased, so the potential to restore natural ecosystems is very low. This also showed by the juvenile corals which have a very low density (0.04 colonies/m2).
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