Electronic Theses and Dissertation

Ekosistem terumbu karang merupakan ekosistem yang terbentuk oleh organisme laut penghasil kapur (CaCO3) yang terdapat di dasar laut tropis. Ikan karang memanfaatkan struktur kompleks dari terumbu karang untuk berlindung dari predator, berkembang biak, dan sekaligus mencari makanan. Penelitian ini bertujuan untuk mengidentifikasi jenis dan menganalisis kondisi terkini persentase tutupan terumbu karang, mengkaji faktor-faktor yang mempengaruhi perubahan tutupan terumbu karang, menganalisis kelimpahan ikan karang di kawasan tersebut, dan menganalisis korelasi antara hubungan tutupan karang dengan kelimpahan ikan karang di Kawasan TWA Pulau Weh. Metode pengambilan data terumbu karang menggunakan metode Point Intercept Transect (PIT) dan metode pengambilan data ikan menggunakan metode belt transect dengan pendekatan Underwater Visual Census (UVC). Data yang didapatkan kemudian diuji hubungannya dengan uji korelasi Pearson menggunakan aplikasi RStudio. Hasil dari penelitian menunjukkan bahwa persentase tutupan karang tertinggi terdapat di Ujung Seurawan (63,21%) dan terendah terdapat di Rubiah Channel (20,18%). Kelimpahan ikan tertinggi didapatkan di Barat Seulako (26.760 ind/ha) dan terendah di Batee Meureunon (22.087 ind/ha). Hasil uji korelasi menggunakan aplikasi RStudio menunjukkan bahwa hubungan tutupan terumbu karang dengan kelimpahan ikan karang berkorelasi positif namun tidak signifikan secara statistik. Faktor yang mempengaruhi perubahan tutupan terumbu karang adalah suhu air laut, kualitas perairan, keberadaan polutan atau zat kimia berbahaya dan aktivitas manusia.

Kata kunci: Persentase Tutupan Terumbu Karang, Kelimpahan Ikan Karang, Uji Korelasi Pearson, Aplikasi RStudio

Coral reef ecosystems are formed by marine organisms that produce lime (CaCO3) found on the tropical seabed. Reef fishes utilize the complex structure of coral reefs to protect themselves from predators, reproduction, and searching for food. This study aims to identify types and analyze the current conditions of the percentage of coral reef coverage, examine factors that influence changes in coral reef coverage, analyze the abundance of coral fishes in the area, and analyze the correlation between the relationship between coral coverage and the abundance of coral fishes in the TWA Pulau Weh Area. The method of collecting coral reef data uses the Point Intercept Transect (PIT) method and the method of collecting fish data uses the belt transect method with the Underwater Visual Census (UVC) approach. The data tested using statistical analyzis with the statistical analyzis software namely Pearson correlation test with the RStudio application. The results of the study showed that the highest percentage of coral cover was in Ujung Seurawan (63,21%) and the lowest was in Rubiah Channel (20,18%). The highest fish abundance was found in West Seulako (26.760 ind/ha) and teh lowest was in Batee Meureunon (22.087 ind/ha). The result of the correlation test using RStudio application showed that teh relationship between coral reef cover and reef fish abundance was positively correlated but not statistically significant. Factors that influence changes in coral reef cover are sea water temperature, water quality, the presence of pollutants or hazardous chemicals and human activities. Keywords: Percentage of Coral Reef Coverage, Abundance of Reef Fish, Pearson Correlation Test, RStudio Application