The Coral Reef Diversity And Association Animals On Biorock In The Waters Of Sepa Island, Seribu Islands, DKI Jakarta

Marine Science

Biorock is an artificial reef technique developed to restore and rehabilitate damaged coral habitats. Biorock uses low-voltage electricity to accelerate and strengthen coral growth. The biorock method has been applied to several islands in the Seribu Islands National Park, including Sepa Island. The purpose of this research is to identify the diversity of coral reef species and associated biota that live in biorock structures in the waters of Sepa Island, Seribu. The implementation of this research uses survey methods and observations, at three research stations, namely, Domus Moscullis. Domus Pirimidis, and Domus Arkae Similis. Data collection in November 2021, using the purposive sampling method. Research parameters include genus composition, diversity index, uniformity index, and dominance index of the coral reef and associated biota, as well as water Physico-chemical parameters. The results of this research stated that the diversity of coral species in the biorock structure on Sepa Island was 184 individuals from 13 genera, mostly in the Pocillopora and Acropora. The reef fish community was 451 individuals from 21 families, dominated by the Pomacentridae family. In the biorock structure, macroalgae, turf algae, sponges, and tunicates are also found which are competitors for corals in obtaining space on the substrate and food. For the level of stability of the coral reef community, it has a moderate status with a moderate diversity index (1.179- 1.577); low uniformity index (0.245-0.351), and low dominance index (0.250-0.425).

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