PHYTOPLANKTON IN UNCLE HO'S FISH POND AND THEIR CORRELATION WITH HYDROCHEMICAL PARAMETERS

Phạm Thị Thanh; Nguyễn Thị Minh Nguyệt; Vũ Thị Kiều Loan; Tống Trần Huy; Nguyễn Hữu Nghĩa; Lê Nguyên Hưng; Nguyễn Khắc Lâm; Phạm Thái Giang

doi:10.34238/tnu-jst.9128

PHYTOPLANKTON IN UNCLE HO'S FISH POND AND THEIR CORRELATION WITH HYDROCHEMICAL PARAMETERS

About this article

Received: 02/11/23 Revised: 05/03/24 Published: 11/03/24

Authors

1. Pham Thi Thanh , Centre for Environment and Disease monitoring in Aquaculture - Research Institute for Aquaculture number 1
2. Nguyen Thi Minh Nguyet, Centre for Environment and Disease monitoring in Aquaculture - Research Institute for Aquaculture number 1
3. Vu Thi Kieu Loan, Centre for Environment and Disease monitoring in Aquaculture - Research Institute for Aquaculture number 1
4. Tong Tran Huy, Centre for Environment and Disease monitoring in Aquaculture - Research Institute for Aquaculture number 1
5. Nguyen Huu Nghia, Centre for Environment and Disease monitoring in Aquaculture - Research Institute for Aquaculture number 1
6. Le Nguyen Hung, President Ho Chi Minh’s Vestige in the Presidential Palace area
7. Nguyen Khac Lam, Hanoi Agricultural Development Center
8. Pham Thai Giang, Centre for Environment and Disease monitoring in Aquaculture - Research Institute for Aquaculture number 1

Abstract

Managing the pond’s water quality, including the algal community, is vital. This study aimed to evaluate the diversity of algae species and the relationship between Chlorophyll-a with hydrochemical parameters in Uncle Ho’s fish pond. Algae species were identified under a microscope at magnifications of 10×, 20× and 40×, chlorophyll-a was measured with an algae analyzer, and hydrochemical parameters were analyzed in the laboratory which meet ISO 17025:2017 standard. The results showed that there were 93 algal species and under species, in six taxonomic groups, detected in the pond. Chlorophyta was the dominant group (52.69%,) followed by Euglenophyta (19.35%), Cyanobacteriophyta (17.20%), Bacillariophyta (8.60%), Ochrophyta (1.08%) and Rhodophyta (1.08%). Chlorophyceae was the most dominant class with 36 species and under species, of which distinct dominant species were Pediastrum duplex, followed by Pediastrum simplex, Pediastrum tetras, Scenedesmus quadricauda and Dictyosphaerium pulchellum. The mean chlorophyll-a concentration in the rainy season (from April to October) was 1.15 times higher than in the dry season (from November to March). Studied results also found that temperature positively correlated with pH (r = 0.56, P = 0.01), Chlorophyll-a positively correlated with COD, and TSS (r=0.81, =0.64 p<0.01) suggested that the growth of algae caused the change of TSS concentration in Uncle Ho's fish pond. COD had a positive correlation with TSS (r=0.44, p<0.05) due to the adsorption of TSS.

Keywords

Phytoplankton; Diversity; Chlorophyll-a; Hydrochemical parameters; Uncle Ho's fish pond

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DOI: https://doi.org/10.34238/tnu-jst.9128

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