Tương quan giữa sự thay đổi độ mặn và thành phần loài tảo giáp (<i>Dinophyta</i>) ở vùng cửa sông Mỹ Thanh, Sóc Trăng

Abstract

     This study was conducted to assess the effect of salinity variations on species composition of dinoflagellates in My Thanh estuary area to provide database for proposing measures for water quality management to enhance sustainability of shrimp farming in the area. Water samples were monthly collected at high and low tides during a day for assessing physio-chemical parameters and species composition of dinoflagellates during a period of 6 months, from November 2017 to April 2018. The results showed that a total number species of dinoflagellates recorded was 17 in which highest number was obtained at high tide (15 species) and lowest number was recorded at low tide (11 species). The number of species decreased from the estuary to inland area (Nhu Gia). The algae densities ranged from 0-12,153 cell/L and the average densities of dinoflagellates was highest in the estuary both at high tide and low tide (6,382 cell/L and 2,817 cell/L). Results of multivariate correlation analysis showed that species composition of dinoflagellates was affected by salinity variations.

Keywords: dinoflagellates, My Thanh estuary, salinity, species composition.