Nurul Laily, Reni Ambarwati, Dwi A. Rahayu, Nur R. Isnaningsih
Gastropods are one of the communities that utilize the mangrove ecosystem as their habitat. This study aimed to identify gastropods as well as to analyze the community structure of gastropods and analyze their habitat characteristics, in the mangrove area of Kutang Beach, Lamongan Indonesia. Sampling was conducted during the lowest tide using the quadrant-transect method. The Gastropods were identified based on morphological characters. Community structure was analyzed descriptively and quantitatively, based on seven parameters, namely: density (D), relative abundance (KR%), relative frequency (FR%), importance value index (INP%), diversity index (H’), dominance index (C) and evenness index (E). The results revealed that on the Kutang Beach there were 30 species of gastropods belonging to several families. Littoraria articulata (Littorinidae family) had the highest density, D=1.83 ind m-2, with a relative abundance of KR=19.88%, a relative frequency of FR=7.59% and an importance value index of INP=27.47%. The diversity index 1<H’<3 was moderate, the low dominance index C<0.5 indicated the absence of dominance between species and the evenness index 0.6<E<1 was high, indicating a relatively balanced distribution between species. Gastropods’ habitat characteristics in the mangrove ecosystem were: a sandy mud substrate, a temperature of 29±0.00°C; a pH of 7.86±0.00 and a salinity of 3±0.58%. © 2022, BIOFLUX SRL. All rights reserved.
Biology Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Surabaya, Indonesia; Research Center for Biosystematics and Evolution, BRIN, Cibinong, Indonesia
