METHOD OF EUTROPHIC WATER BODY RESTORATION BASED ON ECOSYSTEM MODEL AND BIOMANIPULATION TECHNOLOGY

摘要

#$%^&*AU2020101936A420201001.pdf#####ABSTRACT The present invention relates to a method of eutrophic water body restoration based on an ecosystem model and a biomanipulation technology. First, an ECOPATH model is used to fit an energy flow pattern of a current ecosystem; when it is determined that annual production of phytoplankton or macroohytes in a water body is too high, according to output results of the model, on the basis of minimum primary production required for maintaining operation of the system, a method of quantitatively adding fish consumers is adopted for excess primary production, and a predation effect of the fish consumers is used to increase consumption of the primary production in the system; at the same time, a top-down effect is produced to control biomass and community structure of a primary producer. After the restoration is completed, fish catch is evaluated using the ECOPATH model, and the economic fish species added in the current year are harvested according to evaluation results, to maintain energy balance of the ecosystem.2/2 Performing sample collection of aquatic organisms in a current damaged water body Species Individual Parameters of Trophic predation composition biomass functional groups relationship Inputing data into an ECOPATH model, and performing data fitting, pilot run, checkout, and regrouping Evaluating output results of the model (before restoration) Determininga Evaluating whether Determiningthe main primary productivity exceeds the amount exceeding producer standard the standard Determining the biomass of the added consumer functional groups (herbivorous/filterfeeding/omnivorous/carnivorous) Quantitatively adding fish consumers Evaluating output results of the model (after restoration) Determiningfish Comparing system energy Evaluating changes in c flow changes before and ecosystem performance after restoration parameters FIG. 3