Diversity of phytoplankton species in aquaculture ponds of Dak Ha, Sa Thay, Kon Plong districts, Quang Ngai province
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Abstract
This paper studied the diversity of phytoplankton species at 9 sampling points of aquaculture ponds in 3 districts of Dak Ha, Sa Thay, Kon Plong, Kon Tum province in 2022 ̶ 2023. The results recorded 7 phyla, 98 genera and 142 species, of which 22 genera and 23 species of phytoplankton appeared in all 3 sampling periods. The values of the biodiversity index (H’) and the diversity value index (Dv) at 9 sampling points ranged from 2.51 - 3.66 and 2.39 - 3.58, respectively, indicating that the diversity of phytoplankton in aquaculture ponds is high and very high. The regulation index (J) ranged from 0.95 - 0.99, indicating that phytoplankton species were evenly distributed at all studied sampling points. The similarity coefficient of species composition of phytoplankton populations at 9 sampling points ranged from 0.43 - 0.85. The number of phytoplankton species in water samples collected at 9 studied locations had a negative correlation with the impedance value of the water samples. In particular, the main environmental factors affecting the cell density of phytoplankton communities at the sampling locations in this study were suspended solids, salinity, and conductivity, which had a positive correlation, and a negative correlation with impedance.
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© 2026 The authors. This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License.
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