Biến động và đa dạng chi vi khuẩn lam Microcystis tại hồ núi Cốc, tỉnh Thái Nguyên

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Tác giả: Thị Thủy Dương, Thị Phương Quỳnh Lê

Ngôn ngữ: vie

Ký hiệu phân loại: 639.31 Fish culture in fresh water

Thông tin xuất bản: Công nghệ Sinh học, 2018

Mô tả vật lý: 189-196

Bộ sưu tập: Metadata

ID: 492084

Thêm vào giỏ

Khảo sát đa dạng chi vi khuẩn lam Microcystis và hàm lượng microcystin trong 3 chủng vi khuẩn lam phân lập ở hồ Núi Cốc trong năm 2011. Kết quả đã xác định được 8 loài thuộc chi Microcytis trong đó loài Microcystis aeruginosa xuất hiện với tần xuất cao nhất. Mật độ tế bào Microcystis ở hồ Núi Cốc đa dạng và biến động theo mùa với số lượng tế bào cao nhất ghi nhận tại thời điểm nhiệt độ cao và ở mùa mưa. Kết quả phân tích sắc kí lỏng cao áp cho thấy hàm lượng độc tố microcystin trong 3 chủng vi khuẩn lam phân lập từ hồ Núi Cốc dao động từ 0,116 đến 0,4 μg MC/mg sinh khối khô. Mật độ tế bào cao của chi Microcystis ở hồ Núi Cốc và hàm lượng độc tố trong các chủng Microcystis cho thấy nguy cơ tiềm ẩn gây hại đến sức khỏe của con người.The Nui Coc reservoir, Thai Nguyen province was built on the Cong River for multi-purposes of providing water for local people such as agricultural irrigation, aquaculture, tourism activities and especially the drinking water supply for the Thai Nguyen city and other surrounding areas. This paper presents the results of the monthly surveys which were conducted during the year 2011 for determination of diversity of Microcytis and the microcystin contents in the isolated Microcystis strains in the water environment of the Nui Coc reservoir. The present results showed that eight species of Microcytis genus of which Microcystis aeruginosa in the water environment of the Nui Coc reservoir was the most abudance. The Microcystis cell density of the Nui Coc reservoir varied seasonally and the highest values were observed in high temperature in the rainy season. The results from the High-Performance Liquid Chromatography (HPLC) analysis showed that the microcystin contents in the isolated Microcystis strains from the Nui Coc reservoir ranged from 0.116 to 0.40 µg MC/mg dried mass. The high cell density of Microcystis and high microcystin concentrations in the isolated Microcystis strains from the Nui Coc reservoir revealed the potential risk for human health. The results also highlighted that it is very necessary and urgent to carry out regular monitoring programs for detecting the occurrence of cyanobacteria and phytoplankton in the water environment of the Nui Coc reservoir in order to timely warn the potential risk of cyanobacteria boom and the adverse impacts on the aquatic ecosystem and especially on human health.

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