STRUKTUR KOMUNITAS KARANG KERAS (SCLERACTINIA) DI ZONA INTERTIDAL PANTAI MANDALIKA LOMBOK TENGAH
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Siti Nurhaliza , Muhlis Muhlis , Imam Bachtiar , Didik SantosoDOI:
10.29303/jbt.v19i2.1390Published:
2019-12-30Issue:
Vol. 19 No. 2 (2019): Juli - DesemberArticles
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Abstract
Abstrak: Zona intertidal merupakan daerah pantai yang terletak antara pasang tertinggi dan surut terendah. Salah satu ekosistem yang terdapat di kawasan intertidal adalah ekosistem terumbu karang. Terumbu karang merupakan salah satu ekosistem laut yang menjadi sumber kehidupan bagi berbagai biota laut sehingga keberadaannya sangat penting, baik dari segi ekologis maupun ekonomis. Pantai Mandalika memiliki ekosistem terumbu karang dengan zona intertidal yang cukup luas. Pesatnya perkembangan wisata di Pantai Mandalika secara tidak langsung akan mempengaruhi kehidupan terumbu karang. Penelitian ini dilakukan untuk menyediakan data dan informasi terkini mengenai kondisi keanekaragaman karang keras di zona intertidal Pantai Mandalika yang mencakup komposisi spesies, famili dan bentuk pertumbuhan, serta indeks ekologi (indeks keanekaragaman, keseragaman dan dominansi spesies). Pengambilan data dilakukan pada bulan Juni 2019 selama periode surut terendah di kawasan intertidal. Metode yang digunakan yaitu metode Underwater Photo Transect (UPT). Hasil penelitian ini menemukan 30 spesies karang keras yang termasuk dalam 8 famili di zona intertidal Pantai Mandalika. Favites paraflexuosa adalah spesies yang paling banyak ditemukan di daerah tersebut dengan persentase 22%. Famili Faviidae (79%) memiliki persentase terbesar di semua transek. Ada 5 jenis bentuk pertumbuhan karang keras di daerah yang 87% di antaranya adalah bentuk karang masif. Nilai indeks keanekaragaman Shannon-Wiener adalah 2,5 dengan indeks keseragaman 0,8, dan indeks dominansi 0,1.
Kata kunci: komunitas, terumbu karang, zona intertidal, keanekaragaman, Pantai Mandalika.
Abstract: The intertidal zone is a coastal area located between the highest and lowest tides. One of the ecosystems in the intertidal area is the coral reef ecosystem. The coral reef is one of the marine ecosystems which is a source of life for various marine biota so that its existence is very important, both in ecological and economic terms. Mandalika Beach has a coral reef ecosystem with a fairly extensive intertidal zone. The rapid development of tourism in Mandalika Beach will indirectly affect the life of coral reefs. This research to provide data for the existing condition of hard corals diversity in the area for better understanding of future research. This research covers the species, family and life form composition, and ecologycal indices (diversity, species equitability, and dominance indices). The research was conducted on June 2019 during the lowest tide period and carried out with a Underwater Photo Transect (UPT) method. The results revealed that Mandalikaââ¬â¢s Intertidal Zone had 30 species of hard corals that belongs to 8 families. Favites paraflexuosa was the most abundant coral in the area with 22% of community composition. The Faviidae family (79%) had the largest percentage in all transects. There were 5 type life forms of hard corals in the area which 92% of them were coral massive type. The Shannon-Wiener diversity index score was 2.5 with equitability index 0.8, and dominance index is 0.1.
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Keywords: community coral reef, intertidal zone, diversity, Mandalika Beach.
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