Struktur Komunitas Makroalga Di Pantai Geger Dan Pantai Mengening Kabupaten Badung

Abstract

Macroalgae is a type of flora known as seaweed and is classified into low-level plants, where roots, stems, and leaves are relatively difficult to distinguish. This study aims to determine the differences of habitat characteristics, number of species, biomass, and macroalgae community structure in Geger Beach and Mengening Beach. This quadrant transect method was used to collect the data. The results show that Geger Beach has sandy substrate, while Mengening Beach has substrate consisting of coral rock. The water quality in both locations are still suitable for macroalgae growth. The results of the study found 8 types of macroalgae in Geger Beach and 10 types of macroalgae in Mengening Beach. The highest macroalgae biomass at Geger Beach was found in Gracilaria hayi with the weight ranging from 72.08-73.18 g/m2, while at Mengening Beach was found in the Valonia aegagropila, ranging from 181.31-190.40 g/m2. The diversity index of macroalgae in Geger Beach was between 1.93-1.99, while at Mengening Beach was between 1.79-2.07, therefore categorized as medium. The dominance index of macroalgae at Geger Beach was between 0.15-0.17, while at Mengening Beach was between 0.17-0.25, therefore the dominance index at both site was categorized low. The evenness index at Geger Beach was between 0.93-0.96, while at Mengening Beach was between 0.78-0.90, which categorized as stable conditions.

Seaweed diversity and community structure on the west coast of Aceh, Indonesia

“…Diversity is strongly influenced by internal factors such as competition between species in utilizing space and food as well as external factors that cause environmental disturbances such as water pollution, exploitation of fishery resources or low biological productivity. Maharani et al (2021) has stated that places that have a stable substrate consisting of coral and rubble have a higher species diversity compared to a less stable substrate consisting of sand or silt. In the sand substrate there are fewer types of macroalgae than coral substrates and coral rubble because sand is a type of substrate that is easily carried away by waves (Ferawati et al 2014).…”

Identification of Macroalgae Diversity at Kelapa Panyuran Beach Tuban Regency

“…Pertumbuhan dan kelimpahan dari makroalga sangat dipengaruhi oleh kondisi lingkungan serta perairan [25], [26]. Pertumbuhan makroalga sangat rentan terhadap tekanan ekologis dan perubahan lingkungan [27]- [29]. Selain itu juga rentan terhadap aktivitas manusia seperti pembuangan limbah ke pantai, aktivitas nelayan yang memakai perahu [30].…”

“…Nilai tersebut menujukkan indeks keseragaman makroalga di Pantai Kelapa dalam kategori sedang. Keseragaman makroalga yang tergolong sedang memiliki nilai indeks keseragaman 0,5 < E ≤ 0,75 (Maharani, 2021). Hasil penelitian menunjukkan bahwa lingkungan Pantai Kelapa tersebut berada dalam kondisi yang kurang stabil [37].…”