COMPARISON OF FRESHWATER ALGAE TYPES IN JUNE AND SEPTEMBER 2019 AT MAE RAM STREAM, MAE RIM DISTRICT, CHIANG MAI PROVINCE, THAILAND

Journal of Applied Biological Sciences

article

Pongpan Leelahakriengkrai¹  Tatporn Kunpradid¹ 

[1] Chiang Mai Rajabhat University, Faculty of Science and Technology, Department of Biology;Chiang Mai Rajabhat University, Faculty of Science and Technology, Centre of Excellence of Biodiversity Research and Implementation for Community

关键词: Benthic diatom;    macroalgae;    water quality.;   

DOI  :  10.5281/zenodo.7114129

学科分类：生物科学（综合）

来源: Nobel Bilim ve Arasirma Merkezi/Nobel Science and Research Cente

【 摘 要 】

The distribution of freshwater algae in Mae Ram Stream in Mae Rim District, Chiang Mai Province, Thailand was investigated in June and October of 2019. Benthic diatoms and macroalgae were collected from nine sampling sites located along a stream in the upstream to downstream areas. The physical and chemical water properties at each sampling sites were analysed and classified for the trophic status. The results show that the water temperature ranged between 22.0-30.0 °C, Velocity 0.28-0.79 m/s, Turbidity 2.98-182.33 NTU, pH 7.01-8.02, Total Dissolved Solids 91.93-162.01 mg/l, Conductivity 131.33-249.35 µs/cm-1 , DO 4.88-8.02 mg/l, BOD5 0.27-3.47 mg/l, Nitrate 0.29-1.29 mg/l, Ammonium 0.09-0.61 mg/l and Soluble reactive phosphorus 0.27-0.96 mg/l. The trophic status of the water at each sampling site was classified as the oligotrophic to mesotrophic. A total of 111 benthic diatoms were found. The most abundant species were Eolimna minima, Nitzschia sp.1, Achnanthes pusilla, Gomphonema lagenula and Nitzschia palea, respectively. The highest species abundance was recorded for Eolimna minima which was found at all sampling sites, whereas Nitzschia palea was found as a majority group only at the downstream sampling sites. A total of 14 species of macroalgae were found and they were classified into four divisions, Chlorophyta, Cyanophyta, Charophyta and Rhodophyta. The most abundant group was Chlorophyta and the least abundant group was Rhodophyta. Furthermore, Compsopogon spp. (Rhodophyta) was found to be a common species at the downstream sites, whereas Nitella sp. and Chara sp. (Charophyta) were only found at the upstream sampling sites.

【 授权许可】

Unknown