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Simulation method for negative effects caused by controlling juvenile fish outbreak by using filter feeding organisms to control ecological rehabilitation project

A simulation method and ecological restoration technology, applied in application, fish farming, climate change adaptation, etc., can solve the negative impact of ecological restoration and other problems, achieve the effect of repairing eutrophic water body, improving lighting conditions, and low cost

Active Publication Date: 2015-08-19
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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AI Technical Summary

Problems solved by technology

A large number of new juvenile fish have a great negative impact on ecological restoration

Method used

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  • Simulation method for negative effects caused by controlling juvenile fish outbreak by using filter feeding organisms to control ecological rehabilitation project
  • Simulation method for negative effects caused by controlling juvenile fish outbreak by using filter feeding organisms to control ecological rehabilitation project

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Embodiment 1

[0020] Embodiment 1 The simulation method that river clam inhibits sediment suspension

[0021] The simulation method of the present invention includes the following processes:

[0022] (1) Sediment preparation: the sediment comes from Taihu Lake, passed through a 60-mesh stainless steel sieve, and fully mixed, and each experimental barrel was divided into 10cm;

[0023] (2) Lake water preparation: Filter Taihu Lake water (500-mesh nylon screen) and mix well. Add half of the lake water to each experimental tank first, clarify for 5 days, and then fill up the water in the tank. Collect water samples and measure the initial hydration indicators of the experiment, such as chlorophyll a (Chl a), total nitrogen (TN), total phosphorus (TP), suspended solids (SS) and dissolved oxygen (OD), as background values;

[0024] (3) The experiment of adding river clams and carp at the same time officially started;

[0025] (4) Sampling: Water samples are taken once every 4 days, and collect...

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Abstract

The invention provides a simulation method for negative effects caused by controlling juvenile fish outbreak by using filter feeding organisms to control an ecological rehabilitation project. The simulation method comprises the following steps: preparing sediment, preparing lake water, adding corbicula fluminea and carps to start an experiment and sampling, wherein the density of the added corbicula fluminea and carps is corbicula fluminea density treatment (0, 60 and 180) and is converted into the unit area biomass (namely 0, 214g / m<2> and 643g / m<2>); the density of the carps is (1 and 3) and is converted into the unit area biomass (namely 4.3g / m<2> and 12.9g / m<2>). According to an experiment biological method adopted by a biological principle, the simulation of the negative effects caused by controlling the juvenile fish outbreak by using the filter feeding organisms to control the ecological rehabilitation project is accurately realized; a biological operation principle is utilized and the filter feeding organisms, namely the corbicula fluminea, are added; the sediment suspension caused by the juvenile fish outbreak of the carps is controlled by the corbicula fluminea, and the illumination conditions of a water body are improved, so that the aim of repairing the eutrophication water body is realized; the method has the characteristics of safety, low cost and the like.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for simulating the negative effects caused by the outbreak of juvenile fish in a filter-feeding biological control ecological restoration project. Background technique [0002] Using classical biomanipulation technology to improve water transparency is one of the most important prerequisites for water ecological restoration. However, biomanipulation technology has encountered many challenges in the practical application of lake ecosystem restoration. The reasons for the unsuccessful biological manipulation are quite complicated. Generally speaking, it is mainly due to the weakening of the trophic cascade effect in the long food chain with the increase of the trophic level and the non-linear relationship of the trophic cascade in the complex food web, which makes the ecological restoration The effect is unsatisfactory. The rapid increase in the number of...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCA01K61/00Y02A40/81
Inventor 李宽意沈睿杰闵屾朱小龙谷娇宁晓雨
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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