Tingkat Rekrutmen Karang Pada Substrat Alami Dan Kedalaman Berbeda Di Pasir Putih, Bungatan, Situbondo, Jawa Timur

Salsabilla, Faiza (2023) Tingkat Rekrutmen Karang Pada Substrat Alami Dan Kedalaman Berbeda Di Pasir Putih, Bungatan, Situbondo, Jawa Timur. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Terumbu karang memiliki manfaat untuk menjaga kestabilan kondisi ekologi pada perairan laut. Namun, kondisi ekosistem terumbu karang tidak terlepas dari ancaman–ancaman yang ditimbulkan baik oleh faktor alamiah maupun antropogenik. Secara alamiah, terumbu karang dapat mengalami pemulihan melalui proses penempelan atau rekrutmen larva hasil reproduksi seksual. Tingkat rekrutmen karang dipengaruhi oleh tersedianya faktor-faktor yang mempengaruhi keberhasilan rekrutmen itu sendiri, salah satunya adalah ketersediaan substrat keras seperti karang mati atau pecahan karang sebagai tempat menempel larva karang. Penelitian ini ditujukan untuk mengetahui dan membandingkan densitas, tingkat rekrutmen dan kekayaan genera rekrut karang pada dua tipe substrat alami yaitu (dead coral) dan pecahan karang (coral rubble) serta pada dua kedalaman berbeda yaitu 5 dan 10 meter di terumbu Batu Lawang dan Teluk Pelita, kawasan Pasir Putih, Bungatan – Situbondo. Rekrut karang yang diidentifikasi dan dihitung kepadatannya merupakan juvenil karang dengan diameter <5 cm pada kuadrat 1x1 m² sebanyak 5 kali replikasi. Rata-rata densitas rekrutmen karang adalah 8,8-9,4 koloni/m² (kategori tinggi) pada substrat karang mati dan 12-13,2 koloni/m² (kategori sangat tinggi) pada substrat pecahan karang di Batu Lawang. Pada lokasi Teluk Pelita, densitas rekrutmen karang adalah 17,4-19,6 koloni/m² (kategori sangat tinggi) untuk substrat karang mati dan 20,2-21,4 koloni/m² (kategori sangat tinggi) pada pecahan karang. Terdapat 24 spesies rekrutmen karang teridentifikasi, di Batu Lawang antara 11-12 spesies di kedalaman 5 meter dan 13-14 spesies di 10 meter sedangkan di Teluk Pelita antara 9-13 spesies di 5 meter dan 11-13 spesies di 10 meter. Spesies rekrutmen karang dominan diantaranya adalah Porites cylindrica, Porites rus, Porites sp, Pavona cactus dan Fungia sp.
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Coral reefs are well known to maintain the stability of ecological conditions in marine ecosystems, for example as a habitat, spawning grounds and shelter for various biota. However, coral ecosystems are also threatened by natural and anthropogenic factors. In 2019, most Indonesian coral reefs were in status of ‘poor’ or ‘fairly good’ with life coral cover was 33,82% and 37,38%. Similar condition occurred in Pasir Putih Situbondo, life coral cover in the area in 2016 ranged from 23,33-32,48%. Naturally, damaged coral reefs are able to undergo recovery through the processes of settlement and recruitment of the larvae resulting from sexual reproduction. Rate of recruitment affected by several factors, including the availability of hard and stabel substrate as a platform for attachment of the larvae. This study aimed to determine and compare the density, recruitment rate and genera richness of coral recruits on two types of natural substrates (dead coral and coral rubble) at two different depths (5 and 10 meters) in Batu Lawang and Pelita Bay reefs, Pasir Putih, Bungatan – Situbondo. Juvenile of corals (>5 cm in diameter) were identified and counted within a 1 x 1 m² quadrate with 5 replications. The average density of coral recruitment was 8.8-9.4 colonies/m² (high category) on dead coral substrate and 12-13.2 colonies/m² (very high category) on crushed coral substrate at Batu Lawang. At the Pelita Bay location, the density was 17.4-19.6 colonies/m² (very high category) for dead coral substrate and 20.2-21.4 colonies/m² (very high category) for coral rubble. There were 24 species of coral recruitment identified, in Batu Lawang between 11-12 species at 5 meters depth and 13-14 species at 10 meters while in Pelita Bay between 9-13 species at 5 meters and 11-13 species at 10 meters. The dominant coral recruitment species include Porites cylindrica, Porites rus, Porites sp, Pavona cactus and Fungia sp.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Coral Recruitment, Depth, Diversity, Natural Substrates, Kedalaman, Keanekaragaman, Rekrutmen Karang, Substrat Alami
Subjects:	Q Science > QH Biology Q Science > QH Biology > QH301 Biology Q Science > QH Biology > QH75 Nature conservation. Landscape protection. Biodiversity conservation. Endangered species and ecosystems (General). Habitat conservation. Ecosystem management. Conservation biology
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Biology > 46201-(S1) Undergraduate Thesis
Depositing User:	Faiza Salsabilla
Date Deposited:	25 Aug 2023 06:49
Last Modified:	25 Aug 2023 06:49
URI:	http://repository.its.ac.id/id/eprint/104254

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