Abstract
Abstrak Indonesia is an ideal place for coral growth because of the tropical climate. Rakata Island is included in the Krakatau Islands Nature Reserve and Marine Reserve area which is influenced by the volcanic activity of son of Krakatau Archipelago and human activities. Both of these activities will affect the growth of coral reefs. The purpose of this study was to determine the current condition of coral reefs and the diversity of living coral forms on Rakata Island. Collecting data for analysis of coral reef cover using the Line Intercept Transect (LIT) method was parallel to the coastline of Rakata Island at two points. The percentage of live coral cover from points I and II at a depth of 5 meters was 50.69% and 33.80% classified as in good and moderate conditions respectively. While the percentage of live coral cover at a depth of 10 meters at points I and II were 41.90 % and 16.01% whice were in moderate and poor conditions. The coral reefs mostly found in point I were leaf corals (CF) namely Turbinaria reniformis and Turbinaria frondens, while in point II were massive corals (CM) were found i.e. Goniastrea edwardsi, Favia pallida, Montastrea valenciennesi, Favites abdita, Astreopora listeria, and Favites complanata.
Highlights
Ringkasan Indonesia is an ideal place for coral growth
Rakata Island is included in the Krakatau Islands Nature Reserve
Marine Reserve area which is influenced by the volcanic activity of son
Summary
PPengambilan data tutupan terumbu karang ini dilakukan mulai dari bulan april 2017 di Pulau Rakata, Kepulauan Krakatau. Metode Manta Tow merupakan metode untuk menentukan areal pengambilan data dengan cara berenang menggunakan peralatan dasar selam (masker, snorkel, dan fins) atau menarik peneliti dengan perahu. Hasil survey manta tow ditentukan lokasi pengambilan data dengan menggunakan GPS (Global Position System). Hasil metode manta tow ditentukan 1 titik pengambilan data terumbu karang dikedalaman 5 dan 10 meter. Lokasi penentuan titik pengambilan data berdasarkan daerah yang kerapatan terumbu karangnya tinggi. Metode analisa pada pengambilan data terumbu karang menggunakan metode Line Intercept Transect (LIT) sejajar garis pantai (horizontal). Metode LIT diawali dengan membentangkan panjang transek garis (rol meter) dengan panjang 100 meter sejajar dengan garis pantai pada kedalaman 5 dan 10 meter di titik (Gambar 1) yang telah ditentukan GPS pada metode Manta Tow. Pengukuran tutupan terumbu karang dengan mencacat -nya (Tabel 1) dilakukan sepanjang 20 meter dengan interval.
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