Muhammad Arif Asadi, Feni Iranawati, Muhammad Ashif
Bivalves play an important role in regulating bodies of water as well as in providing a wide range of ecosystem services including habitat complexity provision. A study of bivalve community structures in intertidal areas of Lamongan regency was conducted in June 2017 during the beginning of the dry season. It aimed to assess the species richness and ecological indices, as well as to analyze physicochemical parameters that might influence the community structures. Three 50-m long transect lines in each station were laid perpendicular to the coastline with five 1 x 1 m quadrant transects in each line. Results showed that there were 4 families, 8 genera and 8 species of bivalves of which Gafrarium pectinatum had the highest density, representing 82% of all bivalve individuals. On average, the Shannon’s diversity index (H’) and the Pielou’s evenness index (J’) were 0.4 and 0.35 respectively, while the Simpson dominance index (D) was 0.75. Ostreidae was evenly distributed and probably played an important role to govern the higher diversity and evenness indices, while G. pectinatum was responsible for the low value of diversity and evenness indices as well as the high value of the dominance index. © 2018, BIOFLUX SRL. All rights reserved.
Marine Science Department, Brawijaya University, Jl. Veteran no. 16, Malang, 65144, Indonesia
