Abstract

Gastropods belong to Phylum Mollusca. Gastropods are found in many watersheds. The Jangkok River is a watershed that flows from the mountains of West Lombok Regency across the city of Mataram and most interacts with human activities. This study aims to: 1) identify the types of Gastropods found in the Jangkok River in Mataram City; and 2) developing the results of research on the diversity of Gastropods in the Jangkok River in Mataram City as Bioindicators of Environmental Pollution in the effort to Compile the Guidelines for Ecological Practicum. This type of research is explorative descriptive research, which is a social research method that aims to provide a definition or explanation of the concepts or patterns that will be used in research. Data collection techniques using observation, validation, legibility, and documentation. Data analysis techniques use species diversity index and percentage techniques. The results showed that there were 51 individual Gastropods consisting of 7 species which had been found including Potamopyrgus antipodarum, Mya arenaria, Ilyanasa aobsoleta, Pomacea canaliculata, Pomace ainsaluran, Poamarcobula amurensis, and Melanoides punctata. Species diversity in the upstream station is very low with a value of 0, the middle station has a diversity index with a value of 0.91 indicating low diversity, and at the downstream station has a diversity index with a value of 1.29 indicating moderate diversity. The average value of the validation test for practicum instructions is 80.6%, and the student readability test is 81%, with this result the practicum instructions that have been compiled are in a very valid category and do not need to be revised.

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