Scleractinian Coral Communities of the Gili-Noko Island, Bawean, Indonesia | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 100, Volume 28, Issue 4, July and August 2024, Page 1655-1669 PDF (1.59 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.2024.374556 | ||||
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| Author | ||||
| Asadi et al. | ||||
| Abstract | ||||
| Indonesia is recognized as being among the epicenters of the biodiversity of coral reefs. However, only less than a quarter of Indonesia’s coral reefs are in good condition. In the Java Sea, despite many threats, reef-building corals are still thriving on some islands, including the Gili-Noko Island, Bawean. In this study, distribution, coral cover, and ecological indices of Scleractinia corals on Gili-Noko Island were examined. Scuba diving and underwater photo transect (UPT) method were performed. The images were analyzed using coral point count with excel (CPCe). Ecological indices used in this study were Shannon-Wiener diversity index, Eveness index, and Simspon dominance index. At each station, 50 quadrant transects (58x44 cm) were set along a 50-m line transect, totaling 200 quadrants of 4 stations. Life coral covers were almost uniform, ranging from 50.87 to 56.86%, with an average of 52.67%. Overall, there were 20 genera (9 families) of Scleractinia corals, with moderate diversity values (1.51), moderate evenness (0.60), and low dominance levels (0.28). The genera Acropora, Montipora, and Favia were observed at all stations, with Acropora dominating the Scleractinia communities with an average of 56.1%. The major coral lifeforms were Acropora submassive (ACS), Acropora tabulate (ACT), coral massive (CM), and coral branching (CB), with percentages of 17.94, 11.57, 8.54, and 7.54%, respectively. Based on life coral covers, the coral reefs of the Gili-Noko island, Bawean, are in good condition with significant diversity. Therefore, management actions should be implemented to protect those ecosystems’s treasure troves. | ||||
| Keywords | ||||
| Acropora submassive; Bawean; Coral cover; CPCe analysis; Scleractinia corals | ||||
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