Community Structure of Bacillariophyceae Class Microalgaes in Interidal Waters of Gili Sulat, East Lombok

Gili Sulat is a mangrove forest area that still in good condition and has role balancing the surrounding ecosystem, especially for microalgae community. The community structure of (phytoplankton) class Bacillariophyceae intertidal ecosystem Sulat, East Lombok not been identified. research was conducted to determine Basillariophyceae Intertidal Waters, Lombok. This type descriptive exploratory. Sampling water Waters Lombok, carried out at six sampling points. analytical indices used are density index, diversity species evenness importance value. total 1,745 individuals/liter. index value 2.92 included medium category. highest significant obtained by Synedra ulna 45.80% found each point. 0.82 classified as stable (even), meaning no dominates large number individuals particular Bacillariaphyceae waters quite because it fairly high density, with moderate category dominance relatively same (so dominates).