Succession pattern of phytoplankton of Daning River in the Three Gorges Reservoir and its driving factors

被引：1

作者：

Zhang J.-L. ^{[1
]}

Zheng B.-H. ^{[2
]}

Liu D.-F. ^{[1
]}

Wang L.-J. ^{[2
]}

Tan Q.-R. ^{[1
]}

机构：

[1] Key Laboratory of Ecological Remediation of Lakes and Rivers and Algal Utilization of Hubei Province, College of Civil and Environmental, Hubei University of Technology, Wuhan

[2] State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental Sciences, Beijing

来源：

Zheng, Bing-Hui (zhengbh@craes.org.cn) | 2017年 / Science Press卷 / 38期

关键词：

Driving factors; Ecological functional groups; Phytoplankton; Succession pattern; Three Gorges Reservoir;

D O I：

10.13227/j.hjkx.201606137

中图分类号：

学科分类号：

摘要：

To elucidate succession pattern of phytoplankton in the Daning River and its driving factors, multivariate statistical analysis was conducted. By using the monitoring data in different seasons of Daning river during April 2012 to January 2013, this paper analyzed the succession pattern of phytoplankton in the Daning River and its driving factors in typical tributaries of river-style reservoirs. According to the characteristics of water level, the operational period of the TGR was classified into following four stages: stage I (pre-November-April), stage II (May-July), stage III (July-September) and stage IV (September-November). (1)The results indicated that the values of Chlorophyll-a concentrations and algal density showed similar seasonal variations, with the highest values occurring in stage III, followed by stages IV, II and I. Succession of C-R-S growth strategies was the same generally: CR-R type dominated in stage I, CS, CR/CS and R-CR dominated in stage II, III and IV, respectively. (2)The mean values of Margalef index and Pielou index in stage IV and III were significantly greater than those in stage II and I; the value of Shannon-waver index showed that the highest value in stage III, followed in a descending order by stage I, II and IV; the successional rate had the highest value in stage IV, followed in descending order by stage III, I and II. (3) The results of Correlation analysis suggested that no significant relationships were observed between the environmental parameters and phytoplankton abundance in stage I. The results indicated that relative water column stability(RWCS), index of feasible energy for phytoplankton (Et) and index of feasible energy (Ef*) were key regulatory factors for phytoplankton community in stage I. The results indicated that Et, Ef* and total phosphorus (TP) were key regulatory factors for phytoplankton abundance in stage II. The results of the redundancy analysis (RDA) suggested that RWCS, TP and the ratio of euphotic depth [Deu(λPAR)] to mixing depth (Dmix)[Deu(λPAR)/Dmix] were key regulatory factors for phytoplankton community composition in stage II. The results indicated that Ef* and TP were key regulatory factors for phytoplankton abundance in stage III. The results of the RDA suggested that [Deu(λPAR)/Dmix], Et, Ef* and TP were key regulatory factors for phytoplankton community composition in stage III. The results indicated that TP was key regulatory factor for phytoplankton abundance in stage IV. The results of the RDA suggested that [Deu(λPAR)/Dmix] was key regulatory factor for phytoplankton community composition in stage IV. © 2017, Science Press. All right reserved.

引用

页码：535 / 546

页数：11

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