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All Journal BioEksakta : Jurnal Ilmiah Biologi Unsoed
Achmad Ilalqisny Insan
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Veterinary

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Komposisi Jenis dan Kepadatan Rumput Laut Hydrokoloid berdasarkan Karakteristik Dasar Perairan di Daerah Intertidal Nusakambangan Timur Cilacap Dwi Sunu Widyartini; Achmad Ilalqisny Insan; Kamsinah kamsinah
BioEksakta : Jurnal Ilmiah Biologi Unsoed Vol 2 No 4 (2020): BioEksakta
Publisher : Fakultas Biologi Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.bioe.2020.2.3.3568

Abstract

ABSTRACT Hydrocolloid seaweed is seaweed which contains agar, carrageenan and alginate, which are widely used as industrial raw materials. This study aims to determine the type composition of hydrocolloid seaweed and its density based on the characteristics of the bottom waters in the intertidal area of ​​East Nusakambangan Cilacap. The waters of East Nusakambangan have a central coral beach and a hollow coral beach which has a substrate in the form of sand, coral, volcanic rock, and coral fragments. This study used a survey method and sampling using a transect, a perpendicular line of the coast towards the sea, each transect line was placed with a quadrant plot (1 x 1m2) randomly selected on hard and soft substrates. The results of this study, the coral substrate on the two beaches obtained 2-8 types of hydrocoloid seaweed, with the highest composition of seaweed species of 57.6% on hard substrate with the highest density in the Gracilaria gigas species; 440.6-1239.7 g / m2, Gracilaria gigas has a Dichotomus branching type with a cylindrical talus shape. In the mixed substrate on the coast of Karang Tengah, there were 4 types of Hydrocoloid seaweed with a composition of 46.3% hydrocoloid species with the highest density in the species Padina australis; 387.7g / m2. Padina australis sheet and unbranched talus form Keywords: hydrocolloid, composition, East Nusakambangan, Intertidal
KEANEKARAGAMAN DAN DOMINANSI RUMPUT LAUT HIDROKOLOID PADA SUBSTRAT YANG BERBEDA DI PERAIRAN PANTAI KARANGTENGAHNUSAKAMBANGAN CILACAP Bayu Ardiyanto; Achmad Ilalqisny Insan; Dwi Sunu Widyartini
BioEksakta : Jurnal Ilmiah Biologi Unsoed Vol 2 No 3 (2020): BioEksakta
Publisher : Fakultas Biologi Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.bioe.2020.2.3.2999

Abstract

The waters of Karangtengah Nusakambangan Cilacap have various types of substrates, namely sand, coral and mixture. Beach conditions with many types of substrates allow various species of seaweed to grow. Information regarding the diversity and dominance of seaweed producing hydrocolloid species has not been much studied in the waters of Karangtengah Beach. This study aims to determine the diversity and dominance of seaweed producing hydrocolloids on different substrates in the waters of Karangtengah Nusakambangan Cilacap. This study uses a survey method with a sampling technique that is the selected random transect method. Six transect lines were made perpendicular to the coastline and the distance between transects was 25 m. Each transect was made three plots, each plot measuring 1x1 m based on the substrate (coral, sand, and mixture). The main parameters observed were the amount of biomass and the number of species. Supporting parameters observed were environmental factors namely temperature, salinity, pH, current speed and depth. The number of hydrocolloid seaweed species found was 10 species of seaweed with details of 5 alginate-producing species, 3 agar-producing species, and 2 carrageenan-producing species. The diversity index value in the coastal waters of Karangtengah between 0,6-2,0 was classified as moderate diversity. The dominance index value in the coastal waters of Karangtengah between 0,2-0,6 was classified as low dominance.
Co-Authors Bayu Ardiyanto Dwi Sunu Widyartini Kamsinah Kamsinah