Pola Distribusi Siput Air (Gastropoda) sebagai Bioindikator Pencemaran Air di Sungai Unus Kota Mataram dalam Upaya Pengembangan Modul Ekologi

Abstract

Based on the results of preliminary observations on the Unus River, Mataram City, gastropods in each village which the river flows through have different characters according to the activities around the river and the level of river water pollution. So it is necessary to study the distribution patterns of water snails (Gastropoda) as bioindicators of water pollution in the Unus River, Mataram City in an effort to develop an ecological module. The aims of this study were (1) to find out how the distribution patterns of gastropods in the Unus river in Mataram City, (2) identify the types of gastropods found in the Unus River in Mataram city, (3) to reveal the dominant population of gastropods that dominate in the Unus river in Mataram city. , (4) analyzing the population density of Gastropods in the Unus river, Mataram City, (5) analyzing the diversity of Gastropod species in the Unus river, Mataram City, and (6) developing the results of research on Gastropod Distribution Patterns as a Bioindicator of Water Pollution in the Unus River, Mataram City in Module Development Efforts Ecology. This type of research is descriptive exploratory and developmental research for the development of ecological modules. The sampling technique used was purposive sampling technique and the length of the transect used was 30 m. Based on the results of the study, namely the highest morbidity index was the Thiara requenti species with a value of 0.253 which was in the regular category. Twelve species from 5 families were found, namely Pomacea canaliculata, Mellanoides plicaria, Apella demisum, Mellanoides puncata, Taribea granifera, Goniobasis virginica, Fillopaludina javanica, Thiara scabra, Thiara sp, Thiara requenti, Mellanoides tuberculata. The highest gastropod dominance population was owned by the Mellanoides plicaria species with a total of 0.48. The highest population density was occupied by the Thiara requenti species with a value of 7.3. the highest Gastropod species diversity level is located at station 2 with a value of 1.82. Based on the results of the validation and readability test of the ecological module, the average values ​​were 90 and 82.9 for the readability test. It was concluded that the module was very feasible to use.