Remediation Of Aquatic Aanimals And Plants On Eutrophic Water Body

In recent years, with the city’s rapid economic development, the eutrophication oflakes, reservoirs and other aquatic ecosystems has become one of the world’s commonenvironmental problems, eutrophication will not only water quality deterioration, thebiodiversity of the water drop, aquatic ecosystem destruction, the more harm to humanhealth. Eutrophication has caused widespread concern and attention of the limnologyscientists, biologists and environmental scientists. Many studies show that theeutrophication of water bodies as ecological problems, relying solely on a single animal,a single plant or single method, it is difficult to control eutrophication.This study was conducted in the indoor laboratory, including silver carp and bighead carp two kinds of filter feeding fish and Myriophyllum, Cabamba carolimana,Echinodorus three kinds of aquatic plants, by building a combination of indoor smallwater ecosystems, including a single filter feeders fish combination and the commoncombination of filter-feeding fish and aquatic plants, we studied aquatic plants and filterfeeding fish different combinations of the role of ecological restoration of eutrophicwater. The test results show that:1) Filter-feeding fish can repair and purify TN, TP and Chla of eutrophic water,especially the suppression and removal of algae.2) A small ecosystem by aquatic plants and filter feeding fish have good removalefficiency on the eutrophication of water bodies’TN, TP and Chla, the purification ofeutrophic water is better than a single filter-feeding fish combinations.3) In the aquatic plant and animal portfolio composed of silver carp and three kindsof aquatic plants, the combination of silver carp and Myriophyllum eutrophic waterbody purification effect is better, and the silver carp and Myriophyllum combination ofTN, TP, and the Chla removal have shown a better purification effect.4) In the aquatic plant and animal portfolio composed of bighead carp and threekinds of aquatic plants, a combination of bighead carp and Myriophyllum, acombination of bighead carp and Echinodorus are better on purifying effect ofeutrophication, the combination of bighead carp and The Myriophyllum is moresignificant on TN removal efficiency.5) in a small ecosystem of aquatic plants and filter feeding fish，with temperatureand other external conditions change, aquatic plants and fish will have different degrees of death, when it is applied to the actual lake water bodies, it is timely to salvage thebrown aquatic plants and fish of death, and uptake of N and P nutrients with the plantout of the water, to prevent the release of N and P with death of the aquatic plants andanimals.