Abstract
The purpose of research is studying the variation of zooplankton community in Ba Lai river in Ben Tre province. Research was conducted in 2 seasons: rainy season (December, 2017) and dry season (March, 2018). There were 7 sampling points in Ba Lai river, Ben Tre province. Our study recorded 95 taxa zooplankton belong to 56 genera, 39 families, 12 orders, 8 classes and 5 phylums. Generally, Rotifers had highest munbers of species among 2 seasons. Rotifers were dominant in density and species composition at all sampling points in the rainy season. Copepods were dominant in density and species composition in the dry season. There were some marine species present at sampling points during the dry season. In addition, the Bray - Curtis analysis showed that the similarity of the zooplankton communities between rainy season and dry season at sampling points wasnot high. This suggests that there was a shift in the structure of the zooplankton community between rainy season and dry season. These are proof to prove the salinity rising in Ba Lai river in dry season. Although there is an irrigation dam to prevent the infiltration of salt water, but the infiltration of salt water is happening. A solution to preserve fresh water to provide local people in dry season is necessary.
Highlights
The purpose of research is studying the variation of zooplankton community in Ba Lai river
Research was conducted in 2 seasons
95 taxa zooplankton belong to 56 genera
Summary
TÓM TẮT Mục tiêu của nghiên cứu nhằm khảo sát sự biến động của quần xã phiêu sinh động vật trên sông Ba Lai tỉnh Bến Tre. Nghiên cứu được tiến hành vào 2 mùa: mùa mưa (tháng 9/2017) và mùa khô (3/2018). Nghiên cứu được tiến hành tại 7 điểm thuộc sông Ba Lai, tỉnh Bến Tre. Kết quả ghi nhận được 95 taxa phiêu sinh động vật thuộc 56 giống, 39 họ, 12 bộ, 8 lớp, 5 ngành. Vào mùa mưa, nhóm Rotatoria là nhóm chiếm ưu thế về mật độ và thành phần loài tại các điểm thu mẫu. Có sự xuất hiện của một số loài nước mặn tại các điểm thu mẫu vào mùa khô. Đây là bài báo công bố mở được phát hành theo các điều khoản của the Creative Commons Attribution 4.0 International license
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