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Water 2018, 10(2), 152; https://doi.org/10.3390/w10020152

Impacts of Environmental Variables on a Phytoplankton Community: A Case Study of the Tributaries of a Subtropical River, Southern China

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1
Beijing Key Laboratory of Traditional Chinese Medicine Protection and Utilization, Faculty of Geography Science, Beijing Normal University, Beijing 100875, China
2
College of Resources Science and Technology, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China
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College of Resource and Environment, Yunnan University, Kunming 650091, China
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Shenzhen Academy of Environmental Sciences, Shenzhen 518001, China
*
Author to whom correspondence should be addressed.
Received: 15 December 2017 / Revised: 2 February 2018 / Accepted: 2 February 2018 / Published: 4 February 2018
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Abstract

The phytoplankton community in the river is closely related to the location of the river and the impact of human activities. To summarize the patterns of phytoplankton community changes in rivers and to analyze the reasons for these patterns and differences, we sampled the three tributaries of the Dongjiang River at different latitudes in the dry and rainy season for three years. The results showed that the three rivers were mesotrophic, lightly eutrophic and moderately eutrophic respectively. From the south to the north, the water temperature and nutrition showed an increasing trend. In two different seasons, the differences in the water temperature and dissolved oxygen were clear. In the dry season, results of the multidimensional scaling (MDS) analysis indicated that the phytoplankton community structures in the Li River and Qiuxiang River were similar. Regardless of the number of species, the cell abundance or the dominance index, Bacillariophyta were found to be dominant. Chlorophyta was dominant in the Danshui River. In the rainy season, Bacillariophyta, Bacillariophyta-Chlorophyta and Chlorophyta-Cyanophyta became the dominant types in the Li River, Qiuxiang River and Danshui River, respectively. These different patterns in phytoplankton community variation were affected by both the water quality and temperature. View Full-Text
Keywords: phytoplankton community; variation pattern; trophic level; seasonal change; subtropical river phytoplankton community; variation pattern; trophic level; seasonal change; subtropical river
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Hou, Z.; Jiang, Y.; Liu, Q.; Tian, Y.; He, K.; Fu, L. Impacts of Environmental Variables on a Phytoplankton Community: A Case Study of the Tributaries of a Subtropical River, Southern China. Water 2018, 10, 152.

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