Hongjie Qin1, Zhiyong Zhang1, Haiqin Liu1, Dunhai Li2, Xuezheng Wen1, Yingying Zhang1, Yan Wang1, Shaohua Yan3. 1. Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, People's Republic of China. 2. Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, People's Republic of China. 3. Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, People's Republic of China. shyan@jaas.ac.cn.
Abstract
To achieve the goals of harmful cyanobacterial bloom control and nutrient removal, an eco-engineering project with water hyacinth planted in large-scale enclosures was conducted based on meteorological and hydrographical conditions in Lake Dianchi. Water quality, cyanobacteria distribution, and nutrient (TN, TP) bioaccumulation were investigated. Elevated concentrations of N and P and low Secchi depth (SD) were relevant to large amount of cyanobacteria trapped in regions with water hyacinth, where biomass of the dominant cyanobacteria Microcystis (4.95 × 10(10) cells L(-1)) was more than 30-fold compared with values of the control. A dramatic increase of TN and TP contents in the plants was found throughout the sampling period. Results from the present study confirmed the great potential to use water hyacinth for cyanobacterial bloom control and nutrient removal in algal lakes such as Lake Dianchi.
To achieve the goals of harmful cyanobacterial bloom control and nutrient removal, an eco-engineering project with water hyacinth planpan>ted inpan> large-scale enclosures was conpan>ducted based onpan> meteorological anpan>d hydrographical conpan>ditionpan>s inpan> Lake Dianpan>chi. pan> class="Chemical">Water quality, cyanobacteria distribution, and nutrient (TN, TP) bioaccumulation were investigated. Elevated concentrations of N and P and low Secchi depth (SD) were relevant to large amount of cyanobacteria trapped in regions with water hyacinth, where biomass of the dominant cyanobacteria Microcystis (4.95 × 10(10) cells L(-1)) was more than 30-fold compared with values of the control. A dramatic increase of TN and TP contents in the plants was found throughout the sampling period. Results from the present study confirmed the great potential to use water hyacinth for cyanobacterial bloom control and nutrient removal in algal lakes such as Lake Dianchi.
Entities:
Keywords:
Bloom control; Eutrophication; Harmful cyanobacteria; Nutrient removal; Water hyacinth; Water restoration
Authors: Daniel J Conley; Hans W Paerl; Robert W Howarth; Donald F Boesch; Sybil P Seitzinger; Karl E Havens; Christiane Lancelot; Gene E Likens Journal: Science Date: 2009-02-20 Impact factor: 47.728