Physicochemical Process, Crustacean, and Microcystis Biomass Changes In Situ Enclosure after Introduction of Silver Carp at Meiliang Bay, Lake Taihu
| Autor: | Chunlong Yi, Chengjie Yin, Congqiang Luo, Leyi Ni, Longgen Guo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Cyanobacteria
Silver carp biology Article Subject Phosphorus lcsh:R chemistry.chemical_element lcsh:Medicine Plankton biology.organism_classification Algal bloom chemistry Algae Environmental chemistry Microcystis Botany lcsh:Q General Agricultural and Biological Sciences Carp lcsh:Science General Environmental Science |
| Zdroj: | Scientifica, Vol 2017 (2017) |
| Popis: | In order to control cyanobacteria blooms with silver carp in Lake Taihu, an in situ experiment was carried out by stocking silver carp at a biomass of 35, 70, and 150 g m-3and no carp control in waterproof enclosures. Physicochemical water parameters and biomass of plankton were measured in enclosures to evaluate the suitable stocking density of silver carp for relieving internal nutrients and constraining cyanobacteria growth in Lake Taihu. It is found that the 35 g m-3silver carp group and 70 g m-3silver carp group presented lower total phosphorus, lower chlorophyll-a, and higher water transparency. Increased nitrogen to phosphorus ratio, which indicated the result of algae decline in fish presence enclosures, was attributed to decline of phosphorus. Phosphorus decline also exerted limitation on reestablish of cyanobacteria bloom. Crustacean zooplankton biomass andMicrocystisbiomass decreased significantly in fish presence enclosures. Silver carp could be more effective to regulate algae bloom in enclosures with dense cyanobacteria. Therefore, nonclassic manipulation is supposed to be appropriate method to get rid of cyanobacteria blooms in Lake Taihu by stocking 35 to 70 g m-3silver carp in application. |
| Databáze: | OpenAIRE |
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