Community structure, phytoplankton density and physical-chemical factor of batang palangki waters of sijunjung regency, west sumatera

3rd International Conference on Biological Sciences and Biotechnology

Gusmaweti^1 ; Deswati, L.^1

Biology Education Study Program, Faculty of Teacher Training, Education University of Bung Hatta, Padang, West Sumatera, Indonesia^1

关键词: Chemical factors;    Community structures;    Conservation areas;    Diversity index;    Long-term goals;    Physical factors;    Phytoplankton densities;    Water temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/130/1/012023/pdf
DOI  :  10.1088/1755-1315/130/1/012023

来源: IOP

【 摘 要 】

The long-term goal of this study is to provide an overview of the presence of phytoplankton in support of its functions in the waters of Batang Palangki as a conservation area of information on river water management, especially for Batang Palangki stakeholders. Specific targets to be achieved in achieving these objectives are (1) to know the density of phytoplankton, index of diversity of species, equitabilty index, domination index, and in Batang Palangki waters, and (2) to analyze the chemical and physical factors of the waters. The sampling method of phytoplankton is purposive sampling. The phytoplankton sampling is done By filtering 100 liters of water into the net plankton no 25 and filtered into the 25 cc, and then identified. The determination of water quality such as water temperature, water pH and watercolour. dissolved oxygen (DO) and BOD, and Hg content (mercury). The results showed that phytoplankton found from each of station was 370 individualis per liter with the highest density found in the station I of 155. The number of genus was 7, namely Neidium, Gyrogsima, Synedra, Frustulia, Fragillaria, Nitzschia and Peridinium. The diversity index averaged at 0.45, equabilty index averaged at 0.54, while the dominance index averaged at 0.28. Physical and chemical factor measurement results found that water temperature averaged at 26 °C, transparency ranged from 12 - 30 cm, velocity speed ranged from 8 - 15 m/s, while chemical factors such as DO, BOD, and COD ranged from 5.25 to 5.96 mg/L, 3.28 - 3.49 mg/L, and 47.05 - 76.25 mg/L respectively. Likewise, TOM measured in this research was 9.61 - 2.10 mg/L while Hg content ranged from 0.098 - 0.208 mg/L.