Distribution of phytoplankton in the Three-Gorge Reservoir during rainy and dry seasons

The Science of the Total Environment
Hui ZengHongtao Chen

Abstract

After damming of the Yangtze River, in order to explore the impacts of the Three-Gorge Dam (TGD) on the aquatic ecosystem, phytoplankton composition, abundance and biomass spatial distribution were studied in the Three-Gorge Reservoir (TGR), and the closest upstream anabranch Xiangxi River, which is 38 km away from the Three-Gorge Dam (TGD) during August (rainy season) 2004 and April (dry season) 2005. In surveys, 6 transects (2 downstream and 4 cross-stream) and 25 stations have been investigated and 314 samples were collected from the surface to the river bed with water samplers. In TGR, 63 taxa and 60 taxa were identified in the rainy and dry seasons, respectively. In the Xiangxi River, 39 taxa were observed in the rainy and dry seasons. Algal blooms occurred in the Xiangxi River and at the influx region of the Yangtze and Xiangxi in both seasons, but had not occurred prior to damming. In the rainy season, the dominant species was Chroomonas acuta with 1.84x10(7) cells l-1, and in the dry season the dominant species were Asterionella formosa and Cryptomonas ovata with 1.34x10(7) cells l-1 and 1.79x10(6) cells.l-1, respectively. In the main channel of TGR, there were no significant correlations between phytoplankton abundance...Continue Reading

Citations

Jul 6, 2014·Environmental Monitoring and Assessment·YuLing HuangDaoBin Ji
Jun 6, 2013·Environmental Monitoring and Assessment·Faping Bu, Xiaoyi Xu
Jan 9, 2013·Environmental Science and Pollution Research International·Xing-zhong YuanWei Deng
Feb 28, 2015·Scientific Reports·Qingyun YanJizhong Zhou
May 28, 2013·The Science of the Total Environment·E TornésS Sabater
May 29, 2018·Environmental Science and Pollution Research International·Chaoxuan GuoBoqiang Qin
Nov 26, 2008·Water Environment Research : a Research Publication of the Water Environment Federation·Xinghui XiaZhenyao Shen

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