Keanekaragaman Jenis Makroalga di Pantai Afuik, Desa Dualaus, Kabupaten Belu

MANEWALU, Agnes (2025) Keanekaragaman Jenis Makroalga di Pantai Afuik, Desa Dualaus, Kabupaten Belu. Undergraduate thesis, Universitas Katolik Widya Madira Kupang.

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Abstract

Afuik Beach is one of the beach locations that has macroalgae. Afuik Beach has a type of coral substrate . The aim of this study was to determine the richness, diversity, and types of macroalgae utilized by the community around Afuik Beach, Dualaus Village, Belu Regency.The research was conducted in the Afuik coastal area, Dualaus Village, Belu Regency, from February to March 2025.Data collection used the line transect method and survey method, then analyzed quantitatively and qualitatively. Based on the results of the study, it shows that there are 9 types of macroalgae found that there are 9 types of macroalgae found, namely the Chlorophyta / Green Algae division consisting of Caulerpa rasemosa with a total of 13 individuals, Caulerpa sertularoides 7 individuals, Halimeda opuntia 43 individuals, Halimeda cuneata 229 individuals, Boergenesia forbesii 12 individuals, Phaeophyta division namely, Sargassum binderi 364 individuals, Padina gymnospora 26 individuals, Turbinaria ornata 17 individuals while from the Rhodophyta division namely, Gracilaria coronopifolia a total of 107 individuals. So that the total of these 9 types can be obtained 836 individuals. The diversity index value of 1.542 is classified as moderate, the richness index of 1.188 is classified as low, then the dominance index of 0.287 is classified as low, the total abundance value (KT) of 0.176 ind/m2, the highest abundance of macroalgae species of Sargassum binderi with a value (K) = 0.077 ind/m2, the highest relative abundance of macroalgae of the species with a value (K) = 0.435%, the uniformity index of 0.17142 is classified as small while the important value index (INP) with the highest value is 70.874. Based on the questionnaire answers, local people use the Gracilaria coronopifolia species as a vegetable or people call it "Gama/Kama". Each type found has different characteristics and benefits, the quality of the water also has a great influence on diversity so that the quality of a suitable water environment is a determining factor in the growth and development of macroalgae.

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