| dc.description.abstract | Periphyton are microorganisms, both plants and animals, that live attached to, move freely or are attached to the surface of objects in rivers such as rocks, wood, stems of aquatic plants, and so on. Because periphyton is relatively immobile, the abundance and composition of periphyton in waters is influenced by the quality of the waters in which they live. To determine periphyton diversity, it can be assessed using population density, relative density, Shannon-Weinner diversity index, and dominance index and PCA (Principal Component Analysis). The aim of this research is to determine the diversity of periphyton and its relationship with water quality in the Deli River, North Sumatra Province. This research uses quantitative descriptive where the author describes or concludes the data in the form of numbers. The research was carried out in July-August 2023 using a purposive sampling method, namely by selecting 18 points along the Deli River. This research uses quantitative descriptive where the author describes or concludes the data in the form of numbers. Physical and chemical water parameters were also measured in the form of temperature, pH, DO, depth, current speed, brightness, depth, nitrate and phosate. The results of this research show that there are three classes, namely the Bacillariophyceae class, the Chlorophyceae class and the Cyanophyceae class. The Bacillariophyceae class was the most dominant of the three stations, namely 13 types, then 11 types were found in the Chlorophyceae class and 3 types were found in the Cyanophyceae class. | en_US |
