Analysis of the diversity of the nekton community in the clay mining area of pt semen Indonesia (Persero) Tbk Tuban factory

Biodiversity monitoring in mining areas is a key instrument in maintaining ecosystem balance and complying with environmental regulations. This study aims to identify the actual conditions and analyze the dynamics of the necton community in the clay mining area of PT Semen Indonesia (Persero) TbkTuban Factory in the January-June 2022 period compared to data for the 2021 period. Sampling was carried out at three main locations (Sugihan/SUG, Tobo/TOB, and Mliwangan/MLI) using scoop nets and bubu (fish trap). The ecological parameters calculated included the Shannon-Wiener Diversity Index (H'), the Simpson Dominance Index (D'), and the Pielou Equality Index (J). The monitoring results showed that the level of necton diversity at the monitoring site was in the moderate category (1.00 < H' < 3.00). There was a significant increase in the number of individuals at Tobo and Mliwang stations from 2021 to 2022. This monitoring confirms the importance of regular biodiversity monitoring as a form of implementation of environmental protection regulations.