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| Ecological Restoration and Effective Assessment of an Artificial Lagoon in City Beach of Jinshan District in Shanghai |
| YE Wei-jun,CHEN Ya-qu |
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Abstract The ecological restoration item was programmed in an artificial lagoon located in the Jinshan dis‐trict in Shanghai and its effectiveness in controlling the eutrophication of the enclosed lagoon was assessed in the Hangzhou Bay .The main ecological restoration measurements were consisted of seaweed (Gracilar‐ia verrucosa) culture ,construction of artificial wetland by transplanting native marsh plants (bulrush Scirpus mariqueter) ,and manipulation of food web structure of aquatic ecosystem through releasing and stock enhancement of hatchery‐reared aguatic species .It was found that in the ecological restoration the water quality in the lagoon was significantly improved ,including decrease in dissolved inorganic nitrogen (42% ) and phosphorus (50% ) .Additionally ,the ecological restoration measurements extensively amelio‐rated the aquatic food web structure in the lagoon through increase in the abundance of zooplankton and macrobenthos .Zooplankton abundance was found to be increased by 2 .5 times compared to that before the ecological restoration ,and the mean density and biomass of macrobenthos were 16 and 36 times as higher as that before the ecological restoration .Therefore ,the ecological restoration led to increase in abundance of prey species (zooplankton and macrobenthos) ,and to optimization of the aquatic ecosystem structure in the artificial lagoon ,a successive case study for controlling the coastal eutrophication .
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Received: 25 December 2014
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