Algae community and trophic state of subtropical reservoirs in southeast Fujian, China
Algae community and trophic state of subtropical reservoirs in southeast Fujian, China
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闽东南亚热带水库藻类群落及营养状况
DOI：
10.1007/s11356-011-0683-1
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发表时间：
2012-06
影响因子：
5.8
通讯作者：
Guo, Peiyong
中科院分区：
文献类型：
--
作者：
Yu, Xiaoqing;Liu, Lemian;Zhang, Wenjing;Guo, Peiyong
背景、目的和范围福建水库是经济社会可持续发展的重要水资源，但目前对其研究较少。近年来，随着人口的增长和用水需求的增加，许多水库的重点从防洪和灌溉用水转向了饮用水。然而，大多数地区富营养化水平迅速上升，这是最严重和最具挑战性的环境问题之一。本研究对闽东南典型亚热带水库藻类群落特征、营养状况及富营养化控制策略进行了研究。材料与方法2010年夏季福建省11个水库地表水样品采用聚氯乙烯塑料瓶采集。利用光学显微镜对浮游藻类进行了研究。水的性质按国家标准方法测定。结果与讨论浅层储层一般具有较高的营养状态指数（TSI），比深层储层更容易受到人为干扰。共发现硅藻门、绿藻门、绿藻门、隐藻门、蓝藻门、绿藻门、绿藻门、黄藻门等8门129个类群，其中绿藻门（52个）、蓝藻门（20个）、绿藻门（17个）、绿藻门（14个）类群最为丰富。优势类群为绿藻（40.58%）、蓝藻（22.91%）、硅藻（21.61%）、绿藻（6.91%）。不同水库间藻类的物种丰富度、丰度、多样性和均匀度均有显著差异。TSI结果表明，11个水库均为富营养化水库，其中3个为超富营养化水库，6个为中富营养化水库，2个为轻度富营养化水库。藻类多样性与TSI atP呈显著正相关（< 0.05）。典型对应分析（CCA）结果表明，温度、透明度、电导率、DO、TC、NH4-N、NOx-N、TP和叶绿素是影响藻类群落分布的重要环境变量。透明度和叶绿素是解释群落数据的最强环境因子。此外，福建水库氮磷超标的水质退化可能受到农业和城市因素相互作用的影响。今后应制定以流域为基础的管理策略，特别是磷的控制，以保护饮用水源和实现水库的可持续发展。结论与建议根据综合TSI值，调查水库均呈富营养化；研究结果为福建省水库水质退化预警提供了依据。此外，营养状态在形成群落结构和决定藻类物种多样性方面起着重要作用。因此，迫切需要长期定期监测裸藻、蓝藻、TN、TP和叶绿素的水库，以进一步了解富营养化的未来趋势，并制定基于流域的蓝藻水华危害管理策略。
Backgroundaim, and scopeFujian reservoirs in southeast China are important water resources for economic and social sustainable development, although few have been studied previously. In recent years, growing population and increasing demands for water shifted the focus of many reservoirs from flood control and irrigation water to drinking water. However, most of them showed a rapid increase in the level of eutrophication, which is one of the most serious and challenging environmental problems. In this study, we investigated the algae community characteristics, trophic state, and eutrophication control strategies for typical subtropical reservoirs in southeast Fujian.Materials and methodsSurface water samples were collected using polyvinyl chloride (PVC) plastic bottles from 11 Fujian reservoirs in summer 2010. Planktonic algae were investigated by optical microscopy. Water properties were determined according to the national standard methods.Results and discussionShallow reservoirs generally have higher values of trophic state index (TSI) and appear to be more susceptible to anthropogenic disturbance than deeper reservoirs. A total of 129 taxa belonging to eight phyla (i.e., Bacillariophyta, Chlorophyta, Chrysophyta, Cryptophyta, Cyanophyta, Euglenophyta, Pyrrophyta, Xanthophyta) were observed and the most diverse groups were Chlorophyta (52 taxa), Cyanophyta (20 taxa), Euglenophyta (17 taxa), Chrysophyta (14 taxa). The dominant groups were Chlorophyta (40.58%), Cyanophyta (22.91%), Bacillariophyta (21.61%), Chrysophyta (6.91%). The species richness, abundance, diversity, and evenness of algae varied significantly between reservoirs. TSI results indicated that all 11 reservoirs were eutrophic, three of them were hypereutrophic, six were middle eutrophic, and two were light eutrophic. There was a strong positive correlation between algal diversity and TSI atP< 0.05. Our canonical correspondence analysis (CCA) results illustrated that temperature, transparency, conductivity, DO, TC, NH4-N, NOx-N, TP, and chlorophyllawere significant environmental variables affecting the distribution of algae communities. The transparency and chlorophyllawere the strongest environmental factors in explaining the community data. Furthermore, the degradation of water quality associated with excess levels of nitrogen and phosphorus in Fujian reservoirs may be impacted by interactions among agriculture and urban factors. A watershed-based management strategy, especially phosphorus control, should be developed for drinking water source protection and sustainable reservoirs in the future.Conclusion and recommendationsAll investigated reservoirs were eutrophicated based on the comprehensive TSI values; thus, our results provided an early warning of water degradation in Fujian reservoirs. Furthermore, the trophic state plays an important role in shaping community structure and in determining species diversity of algae. Therefore, long-term and regular monitoring of Euglenophyta, Cyanophyta, TN, TP and chlorophyllain reservoirs is urgently needed to further understand the future trend of eutrophication and to develop a watershed-based strategy to manage the Cyanophyta bloom hazards.
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DOI：
--
发表时间：
2001
期刊：
--
影响因子：
--
作者：
K. Clarke;R. Warwick
通讯作者：
K. Clarke;R. Warwick
影响因子：
5.8
作者：
Huibin Yu;B. Xi;Jinyuan Jiang;M. Heaphy;Hailong Wang;Dinglong Li
通讯作者：
Huibin Yu;B. Xi;Jinyuan Jiang;M. Heaphy;Hailong Wang;Dinglong Li
DOI：
10.1139/cjfas-58-10-1905
发表时间：
2001-10-01
影响因子：
2.4
作者：
Downing, JA;Watson, SB;McCauley, E
通讯作者：
McCauley, E
DOI：
10.1360/062005-286
发表时间：
2005-12-01
期刊：
SCIENCE IN CHINA SERIES C-LIFE SCIENCES
影响因子：
--
作者：
Jin, XC;Xu, QJ;Huang, CZ
通讯作者：
Huang, CZ
影响因子：
5.4
作者：
W. W. Walker-W.
通讯作者：
W. W. Walker-W.