PERIPHYTON COMMUNITY STRUCTURE OF ENHALUS ACOROIDES IN BALURAN NATIONAL PARK, SITUBONDO

Abstract

Research on Periphyton Community Structure was carried out by collecting 3 main data, namely seagrass cover data, field sample periphyton data and water quality parameter data. Seagrass cover data was taken from the type of Enhalus acoroides, because this type of seagrass is found in all research locations, besides that the surface size of Enhalus acoroides is quite large compared to other types of seagrass, making it easier for the sampling process. Seagrass cover data was taken using Seagrass Watch guidelines using a transect size of 50 x 50 cm 2. the largest seagrass cover was found on Sirondo beach with a cover percentage of 43.09% and was in the moderate category. The periphyton sampling process used the main ingredient Lugol at a concentration of 4% as a preservative solution and used a brush to scrape the surface of seagrass leaves. The results of the paeriphyton sampling will calculate the abundance and structure of the community (diversity, uniformity and dominance). The highest abundance was found in the Bacillariophyceae class with a value of 60% in all study locations. The average value of the highest diversity in all research locations is 2.41, the average uniformity value is 0.92 and the average dominance value is 0.1. Water quality parameter data collection was carried out in-situ, but Nutrient (Nitrate and Phosphate) analysis was carried out in the laboratory. The average temperature in all study locations was around 29.87 oC, the average salinity was around 31.04 0/00, the average pH was around 6.67, the average DO was around 6.7 mg/l, the average nitrate was around 0.030 mg/l and the average-the average phosphate is around 0.035 mg/l