Kondisi megabentos di perairan Kabupaten Sumba Timur, Provinsi Nusa Tenggara Timur

  • A.W. Cappenberg H
  • et al.
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Abstract

ABSTRAK Terumbu karang merupakan habitat penting bagi berbagai biota yang hidup berasosiasi di dalamnya. Beberapa jenis megabentos mendiami terumbu karang memiliki nilai ekologis dan ekonomis penting, sehingga dapat dijadikan sebagai indikator untuk menilai kesehatan terumbu. Penelitian megabentos di perairan Pulau Sumba, Kabupaten Sumba Timur dilakukan Oktober 2018. Tujuan penelitian untuk mengetahui kondisi megabentos di perairan Sumba Timur. Pengambilan sample menggunakan metode Benthos Belt Transect yang dimodifikasi dari Belt Transect Method. Hasil analisis menunjukkan nilai kepadatan individu di setiap stasiun berkisar dari 0,14-0,74 individuals/m 2 , dengan Diadema spp. memiliki kepadatan tertinggi (2,62 individu/m 2), diikuti Drupella spp. (1,06 individu/m 2), kemudian Panulirus spp. dan Linckia laevigata memiliki kepadatan terendah (0,01 individu/m 2). Nilai indeks keanekaragaman (H') berkisar antara 0,45-1,18, indeks kemerataan jenis (J') berkisar antara 0,32-0,82 dan indeks dominasi (D) berkisar antara 0,35-0,81. Secara umum, kondisi megabentos diperairan Kabupaten Sumba Timur berada dalam kategori rendah hingga sedang. ABSTRACT The coral reef is important habitats for various biota that live in association in this ecosystem. Several species of macrobenthos that inhabit coral reefs have important ecological and economic values, so they can be used as indicators to assess reef health. Research on macrobenthos fauna in Sumba Island waters, East Sumba Regency, was carried out in October 2018. The purpose of this study was to determine the condition of several macrobenthos in East Sumba waters. Data were collected using the modified Belt Transect Method, namely Benthos Belt Transek Method. The analysis shows that the abundance of macrobenthos ranged from 0.14 to 0.74 individuals/m 2. Diadema spp. had the highest abundance (2.62 individuals/m 2), followed by Drupella cornus (1,06 individuals/m 2) and the lowest was Panulirus spp. (crustacea class) and Linkia laevigata (0.01 individuals/m 2). Species diversity index (H") ranged from 1.09 to 1.29, evenness index (J') ranged from 0.80 to 0.92 and species dominance index (D) was between 0.06 and 0.13. In general, the conditions for megabenthos in the waters of East Sumba Regency are in the low to medium category.

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A.W. Cappenberg, H., & Akbar, N. (2020). Kondisi megabentos di perairan Kabupaten Sumba Timur, Provinsi Nusa Tenggara Timur. Jurnal Ilmu Kelautan Kepulauan, 3(2), 130–146. https://doi.org/10.33387/jikk.v3i2.2582

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