Rekrutmen Karang Pada Terumbu Buatan Model Kubah Beton Berongga Dengan Komposisi Bahan Berbeda Di Perairan Pasir Putih, Situbondo

Sari, Inna Kartika (2019) Rekrutmen Karang Pada Terumbu Buatan Model Kubah Beton Berongga Dengan Komposisi Bahan Berbeda Di Perairan Pasir Putih, Situbondo. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Terumbu buatan merupakan struktur buatan yang diletakkan atau ditenggelamkan ke dasar perairan untuk menyerupai terumbu alami, sehingga dapat digunakan sebagai substrat bagi proses rekrutmen karang. Salah satu bentuk konstruksi yang digunakan dalam pembuatan terumbu buatan adalah beton model kubah berongga, dengan penambahan komposisi limbah cangkang kerang dan/atau abu batu. Tujuan penelitian adalah untuk mengetahui komposisi kepadatan dan tingkat rekrutmen karang pada terumbu buatan dengan komposisi bahan berbeda; yaitu C1), beton tanpa modifikasi dengan komposisi semen, pasir dan kerikil, perbandingan 1:3:2; C2), beton dengan modifikasi dari campuran semen, pasir dan cangkang kerang, perbandingan 1:3:2; dan C3), beton dengan modifikasi dari campuran semen, abu batu, pasir dan cangkang kerang, perbandingan 1:2:2:1. Hasil penelitian parameter lingkungan meliputi suhu, pH, salinitas, kecerahan, dan oksigen terlarut (DO) menunjukkan kisaran nilai yang masih berada pada batas toleransi karang mampu hidup, kecepatan arus termasuk dalam kategori lambat, dan laju sedimentasi termasuk kategori ringan hingga sedang. Tingkat rekrutmen karang kategori tinggi (rentang 7,6-10 koloni/ m2) didapatkan pada beton C1 sebanyak 9,5 koloni/m2 dan C2 sebanyak 8,7 koloni/m2, sementara kategori sedang (rentang 5,1-7,5 koloni/m2) didapatkan pada beton C3 sebanyak 6,5 koloni/m2. Total rekrutmen karang yang ditemukan sebanyak 12 genera, dengan dominansi oleh genera Acropora sebanyak 101 koloni, Porites sebanyak 68 koloni, dan Seriatopora sebanyak 43koloni
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Artificial reefs are artificial structures laid on seabeds by mimicking some of the characteristics of natural reefs, as well as to provide substrate for coral recruitment. One of the form in the construction of artificial reefs is a dome-shaped concrete, with the seashell waste and stone ash could be added as an alternative material to the concrete for artificial reefs. The purpose of the study is to know the composition density and level of coral recruitment on dome-shaped concrete artificial reefs made of different materials; C1), concrete without modification, composed by a mixture of Portland cement, sand and gravel, composition was 1:3:2; C2), concrete with modification by a mixture of Portland cement, sand and crushed bivalve’s shells, composition was 1:3:2; and C3), concrete with modification by a mixture of Portland cement, stone ash, sand and crushed bivalve’s shells, composition was 1:3:3:2. The result of environmental parameters include temperature, pH, salinity, brightness, and Dissolved Oxygen (DO) indicate that the range of values are still within tolerance limit of the coral capable of living, current velocity including in the slow category, and sedimentation rate including in mild to moderate category. The high level of recruitments (range 7,6-10 colonies/m2) occurred in C1 and C2 concretes, by 9.5 colonies/m2 and 8.7 colonies/m2, while the moderate level (range 5,1-7,5 colonies/m2) occurred in C3 concrete by 6.5 colonies/m2. Twelve genera of coral recruits were found, with dominated by Acropora (101 colonies), Porites (68 colonies) and Seriatopora (43 colonies)

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Abu batu, cangkang kerang, rekrutmen karang, terumbu buatan
Subjects:	Q Science > Q Science (General)
Divisions:	Faculty of Natural Science > Biology > 46201-(S1) Undergraduate Thesis
Depositing User:	Inna Kartika Sari
Date Deposited:	20 Jul 2026 08:07
Last Modified:	20 Jul 2026 08:07
URI:	http://repository.its.ac.id/id/eprint/68532

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