Abundance, Biomass and Alginate Yield of Padina australis in Sumbawa Aquatic

Abstract

Padina australis is one of brown seaweed which mostly found in Sumbawa coastal
area. This seaweed has a potential as a raw material for alginate. We examined
abundance, biomass and alginate content of P. australis. Data were collected
monthly from October 2012 to January 2013. Sampling was located in the aquatic
of Sumbawa Regency by the number of stations is 3 stations. Station 1 was located
in the aquatic of Labuhan Badas District, stations 2 and 3 were in the aquatic of
Bungin Island. The highest value of biomass were found on May in station 1
(33.98 g wet weight/m2) and the lowest values on station2 (3.12 g wet weight/m2).
Alginate content showed the highest value of 6.65% on May in station 1 and the
lowest value of 3.08% on July in station 2. The results showed that biomass and
alginate contents of P. australis significantly influenced by interaction of physical
and chemical enviromental factors. P. australis grew in station 1 on May had the
highest biomass and alginate contents with characteristics of physical and
chemical enviromental were hard substrate, current 0.40 m s-1, pH 8, temperature
32°C and salinity 32 psu.