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All Journal JFMR (Journal of Fisheries and Marine Research) Makara Journal of Science
EGHBERT ELVAN AMPOU, EGHBERT ELVAN
SEACORM
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Engineering Environmental Science

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Water Quality Assessment in The Occurrence of Acanthaster spp. (Crown-of-Thorns Starfish, CoTS) on Coral Reefs in Menjangan Island, Bali, Indonesia Pradisty, Novia Arinda; Ampou, Eghbert Elvan; Hanintyo, Rizki
Makara Journal of Science Vol. 24, No. 3
Publisher : UI Scholars Hub

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Abstract

Aquatic stressors are known to cause biological impairment that can result in biodiversity loss in several Marine Protected Areas (MPA), including in Menjangan Island, West Bali National Park. The objectives of this study were to correlate the changes in water quality parameters with the biological effect of Crown-of-Thorns starfish (CoTS) population dynamics and to assess the most applicable parameters for continuous environmental monitoring. Field observations and surveys were conducted three times in 2017, during the wet season, dry season and season transition, in order to assess the effect of seasonal variability. Redundancy Analysis (RDA) was performed to determine the relationship between water quality parameters (temperature, dissolved oxygen, pH, salinity, turbidity, total suspended solids, dissolved inorganic nitrogen and phosphate, and chlorophyll-a) and phytoplankton as the indicator of CoTS larvae food supply. The results demonstrate that salinity, turbidity, and dissolved inorganic nitrogen (DIN) are responsible for the 47.7% of phytoplankton variation, which supports the hypothesis of nutrient enrichment as the trigger of CoTS population increase. CoTS outbreak is predicted to occur during the wet season, in areas with high salinity, moderate turbidity, and high DIN, so the outbreak may be related to a high rainfall rate that deliver a high nutrient loading on this region and thus management actions can be initiated during this specific period.
SPOT REKRUTMEN KARANG PADA TERUMBU BUATAN BIOREEFTEK DI PERAIRAN PESISIR DESA KEROBOKAN,BULELENG, BALI Eghbert Ampou, Eghbert Elvan; Tito, Camellia Kusuma; Triyulianty, Iis; Widagti, Nuryani
JFMR (Journal of Fisheries and Marine Research) Vol. 5 No. 2 (2021): JFMR
Publisher : Faculty of Fisheries and Marine Science, Brawijaya University, Malang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jfmr.2021.005.02.28

Abstract

Perairan pesisir Desa Kerobokanmemiliki wilayah terumbu karang yang penting karena terdapat spot rekrutmen sebagai wilayah terumbu buatan alami. Penelitian ini bertujuan untuk mengetahui nilai indeks keanekaragaman, keseragamandan dominansi karang pada terumbu buatan alami “Bioreeftek” di salah satu spot perairan pesisir Desa Kerobokan, Kecamatan Sawan, Kabupaten Buleleng, Provinsi Bali.Metode penelitian yang diaplikasikan adalah observasi dengan sensus visual dengan kamera bawah air dan peralatan selam SCUBA pada enam unit terumbu buatan. Pengambilan data observasi dilakukan pada September 2020. Total rekrutmen karang yang ditemukan sebanyaksembilan jenis biota pada terumbu buatan B1-B6 (B=Bioreeftek), yaituPodobacia sp, Sponge, Atriolum robustum, Favites sp, Gorgonia sp, Porites sp, Diploastrea sp, Coralline algae dan Pocillopora damicornis. IndeksKeanekaragaman tertinggi B3 = 3,4; Indeks Keseragaman tertinggi B3 = 2, 48; Indeks Dominansi tertinggi B5 = 0,68. Biota yang paling banyak ditemukan pada terumbu buatan B1-B6 adalahCoralline algae dan karang Scleractinia dari jenisFavites sp. Kondisi kualitas air di perairan Buleleng menunjukan kondisi normaldan masih berada pada standar baku yang ditetapkan oleh Keputusan Menteri Lingkungan Hidup No. 51 Tahun 2004, kecuali konsentrasi nutrien.This study aims to determine the diversity index value, uniformity, and dominance of corals on natural artificial reefs "Bioreeftek" in Kerobokan Village coastal waters, Sawan District, Buleleng Regency, Bali Province. Data collection was carried out on September 2020. Observations with visual census using underwater cameras and SCUBA diving equipment was applied to observe coral recruitment insix artificial reef units. The results showed that there werenine types of biota found on artificial reefs B1-B6 (B = bioreeftek), that werePodobacia sp, Sponge, Atriollum robustum, Favites sp, Gorgonia sp, Porites sp, Diploastrea sp, Coralline algae and Pocillopora damicornis. The highest diversity index found in B3 = 3,4; The highest uniformity index found B3 = 2,48; and the highest dominance index was in B5 = 0,68. Coralline algae and Scleractinian corals (Favites sp)were abundantly found in artificial reefs B1-B6.Water quality condition in Buleleng water generally showed a normal condition for supporting marine lifes, with exception of nutrient
Co-Authors Camellia Kusuma Tito, Camellia Kusuma Hanintyo, Rizki Nuryani Widagti, Nuryani Pradisty, Novia Arinda Triyulianty, Iis