Komposisi Jenis Fitoplankton Di Perairan Teluk Swage, Desa Pemongkong Kabupaten Lombok Timur

Abstract

Swage Bay is widely used as a fishing cultivation location. This activity is supported by looking at the fertility level of the waters such as looking at the presence of phytoplankton types. This research aims to determine the composition of phytoplankton types. The method used was purposive sampling, by taking 15 sampling locations. Then it is filtered using a plankton net and given Lugol's solution as a preservative. The results showed that there were 15 species found with 12 species from the Bacillariophyceae group and 3 species from the Dinophyceae group. The most common type of phytoplankton found at station 2 was Amphisolenia sp (117 cells/L). The highest total abundance of phytoplankton was at station 1 at 240 cells/L. The high number of Amphisolenia sp species in all stations is thought to be due to the observation location being close to the river estuary which has sufficient nutrient content to meet growth. The ecological index is the highest diversity index at station 11 (2.12), which indicates moderate diversity status. The highest uniformity index is at stations 5 & 6 (0.97) which indicates the high uniformity category. The highest dominance index value is at station 2 (0.6), which indicates that there is a dominant species. The Amphisolenia sp type is thought to be able to adapt to any type of aquatic environment.