Bioecology of Sargassum sp. and its Extract Bioactivity as Anti-MDR Bacteria
Abstract: This study was done
to investigate the bioecology and extract bioactivity of Sargassum sp from
Jepara district. Seaweed was collected from Teluk Awur, Panjang Island,
Bandengan, Ujung Piring and Bondo. There were seven species of Sargassum
identified i.e. S. duplicatum, S. polycystum, S. echinocarpum, S. cinerium, S.
crassifolium, S. plagyophillum and S. binderi. Community structure indices were
calculated based on data collected by survey. Antibacterial activity of
Sargassum extract was done on MDR bacteria. The results showed that diversity
index at Panjang Island, Bandengan, and Ujung Piring were categorized as
medium, while Teluk Awur and Bondo were categorized as low. Evenness index was
high at Teluk Awur, Panjang Island, Bandengan and Ujung Piring and Bondo was
low. There was no dominant species found in most of the locations. The
principal component analysis exhibited the main variable that affected the
Sargassum at Teluk Awur was phosphate, Panjang Island was depth, Ujung Piring
was salinity and Bondo was temperature, dissolved oxygen and pH, respectively.
There was character similarity between Panjang Island and Bandengan (99.73%),
meanwhile, at Teluk Awur, Ujung Piring, and Bondo, the similarity was 99.62%,
99.60%, and 99.52%, respectively. Antibacterial activity of Sargassum sp.
demonstrated a positive activity against the MDR bacteria, Staphylococcus
aureus (6.28±0.04 mm), Escherichia coli (6.96±0.19 mm), and S. epidermidis
(12.65±0.23 mm). Clustering analysis of extracts with bactericidal
characteristic found three classes with similarity of class 1, 2 and 3 at
72.33%, 76.80% and 58.50%, respectively. Sargassum sp. was categorized in class
1 had the best antibacterial activity and the highest abundance value.
Keywords: ecology, community,
Sargassum sp., extracts, antibacterial
Author: Rini Pramesti, Wilis
Ari Setyati, Muhammad Zainuddin, Maya Puspita
Journal Code: jpperikanangg170047
