Received: 15-02-2017
Accepted: 15-06-2017
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Seasonal Variations of Phytoplankton Community Structure in Relation to Physico-chemical Factors in Ba lai River, Ben Tre Province
,
Tran Thi Ngoc Dung
2
,
Tran Thanh Thai
1
,
Nguyen Thi My Yen
1
,
Ngo Xuan Quang
1
Keywords
Canonical correspondence analysis, phytoplankton, water quality, Ba Lai river, Ben Tre. Province
Abstract
This study examined spatial and temporal variation in phytoplankton communities and physico-chemical water properties in Ba Lai River. Phytoplankton and water samples were collected at 8 different stations in two surveys during March (dry season) and September (rainy season) 2016. A total of 104 species belonging to four groups, namely blue greens algae, diatom, green algae and dinoflagellates were recorded with a clear dominance of Bacillariophyceae. The average abundances were 2010 cells/L and 1620 cells/L in in dry and wet seasons, respectively. Species diversity increased from Ba Lai sluice gate-dam towards the river mouth and the upper section. Results of canonical correspondence analysis (CCA) indicated that the phytoplankton assemblage was influenced by total dissolved solids, salinity and nutrient concentrations.
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