Ecosystem model and biomanipulation technology based eutrophic water body remediation method

Abstract

The invention discloses an ecosystem model and biomanipulation technology based eutrophic water body remediation method. Firstly, an ECOPATH model is used to fit the energy flowing mode of the currentecosystem, when the annual production of phytoplankton or aquatic macrophyte in a water body is too high, the minimum primary production requiring for maintaining the operation of the system is takenas the baseline according to the output result of the model, the consumption of the extra primary production in the system is increased through the predation action of fish by using a method of quantitatively adding a fish consumer, and meanwhile, the top-down effect is produced to control the biomass and the community structure of a primary producer. After finishing remediation, the ECOPATH model is used to access the fish catch, the commercial fish species added in the same year are harvested according to the assessment result, so that the balance of energy of the ecosystem is maintained, the fishing catch directly takes away a large quantity of nutritive salts in the water body, and certain economic value is produced. The novel thinking for reference and the technical support are provided for the remediation method taking the scientific experiment as the method from the perspectives of ecology, quantity and energetics, and the method has a very important application value for the ecological remediation of the damaged water body.

Description

technical field [0001] The invention relates to the technical field of ecological environment management, and more specifically, to a method for restoring eutrophic water bodies based on ecosystem models and biological manipulation techniques. Background technique [0002] With the rapid development of economy and society, some freshwater lakes and urban inner lakes in our country are facing the huge pressure of water eutrophication, and the water pollution in some places is very serious, such as Chaohu Lake, Dianchi Lake, Taihu Lake, etc. The main source of water eutrophication pollution is a large number of nutrients contained in water, mainly nitrogen and phosphorus pollutants. Eutrophication of water body is a natural process of water body evolution and aging. Under the influence of human activities, this slow natural process accelerates very quickly. In many areas of my country, especially in areas with a high degree of agricultural intensification and a large amount o...

AI Technical Summary

Problems solved by technology

However, in the process of implementation, there are mainly the following scientific issues that are difficult to determine: 1) the biomass of fish added, 2) the amount of fish recovered and caught, 3) whether the ecosystem has become more perfect, 4) the effect of system restoration how to evaluate

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