Phytoplankton community structure and water quality assessment in an ecological restoration area of Baiyangdian Lake, Ch
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ORIGINAL PAPER
Phytoplankton community structure and water quality assessment in an ecological restoration area of Baiyangdian Lake, China H. Zhu1,2 · X. G. Liu2 · S. P. Cheng1 Received: 25 May 2020 / Revised: 29 July 2020 / Accepted: 24 August 2020 © The Author(s) 2020
Abstract Shihoudian Lake is one of the ecological restoration engineering pilot sites of Baiyangdian Lake, China. To evaluate the phytoplankton characteristics and eutrophication status in Shihoudian Lake, we investigated the community structure of phytoplankton, including the species composition, density, biomass dominance, biodiversity and water quality parameters, in autumn 2018 and spring and summer 2019. The relationships between the community structure and the main environmental factors were analysed using a multivariate statistical method. A total of 143 species of phytoplankton were identified, belonging to 53 genera and eight phyla, and Cyanophyta and Prochlorophyta were the most dominant phyla. Both the density and the biomass were the highest in the summer. A redundancy analysis showed that total phosphorus and chemical oxygen demand were the primary influencing factors of the community distribution of Cyanophyta. Evaluation of the comprehensive diversity index and water quality index revealed that the water of Shihoudian Lake was lightly to moderately polluted, providing scientific evidence for eco-environmental protection and remediation. Keywords Algae · Freshwater ecosystems · Redundancy analysis · Total phosphorus · Trophic status
Introduction Freshwater ecosystems provide important benefits for humans, including providing drinking water, aquatic products and entertainment venues (Strayer and Dudgeon 2010). In recent decades, many lakes have become eutrophic, and some, such as lake Taihu (China’s third largest lake) (Li et al. 2014b) and lake Erie (USA) (Michalak et al. 2013), have even suffered cyanobacterial blooms. Such blooms cause a variety of environmental problems, including reductions in fish yields, deterioration of water quality (Chen et al. 2019), loss of submerged macrophytes (Li et al. 2014b) and an overall decline in biological diversity. Editorial responsibility: Ta Yeong Wu. * S. P. Cheng [email protected] 1
Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, 1239, Siping Road, Shanghai 200092, China
Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, No. 63 Chifeng Road, Yangpu District, Shanghai 200092, China
2
Phytoplankton are essential primary producers (Becker et al. 2010) in water bodies, and changes in phytoplankton species and numbers could directly influence water ecosystem structure and function (Lepistö et al. 2004). Thus, phytoplankton not only represent the basis of mass cycling and energy flow in the whole aquatic ecosystem (Wang et al. 2014a; Wang and Wang 2014) but are also an important indicator of the eutrophic status of water (Kolar et al. 2005). A st
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