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Method for regulating and controlling algae outbreak of lake on basis of food web

A technology for lakes and fish, which is applied in the field of controlling algae blooms in lakes based on food webs, can solve problems such as ignoring the complex interactions of food webs, and achieve the effect of aquatic proliferation in lakes

Inactive Publication Date: 2018-03-16
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the current bioregulation technologies are based on one method, using silver carp to prey on algae, regulating with filter-feeding fish, and carnivorous fish regulation technology based on trophic cascades, but these technologies rarely consider the entire food web. complex interactions, so cannot function in long-term lakes

Method used

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Examples

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Embodiment 1

[0020] The water surface area of ​​a small lake is about 1.0km 2 , due to the discharge of sewage from the outside, the lake is in a state of severe eutrophication. The average total nitrogen concentration of the lake is 14mg / L, and the average total phosphorus concentration is 0.95mg / L. Implement the following projects in this lake to construct a complex lake food web, the specific steps are:

[0021] (1) Construction of producer community: plant 5 emergent plants Typha in the shallow water area of ​​the lake (water depth 0-1.5m) / m 2 Or 10 reeds / m 2 , plant 3 water chestnut plants / m in the water depth of 0.5-1.5m 2 Or 2 water lilies / m 2 , plant submerged plants 3 plants / m in water depth of 1.5-3.0m 2 , Smilax 5 plants / m 2 , Foxtail Algae 5 strains / m 2 , hornwort 5 strains / m 2 Or 2 plants / m 2 .

[0022] (2) Construction of consumer community: put 3000 silver carp / km in the lake 2 , 5000 minnows / km 2 , 2000 grass carp fry / km 2 .

[0023] (3) Predator community con...

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PUM

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Abstract

The invention discloses a method for regulating and controlling algae outbreak of a lake on the basis of a food web, and belongs to the technical field of ecological remediation. According to the method, algae outbreak of the lake is regulated and controlled by simultaneously constructing a producer community, a consumer community and a predator community; species of the producer community comprise emergent aquatic plants, floating-leaved plants and submerged plants; and the predator community comprises filter feeding type fishes and herbivorous fishes; and the predator community comprises carnivorous fishes. On the basis of biomanipulation and complex relationship of interaction of organisms, the method is established by comprehensive considering of three artificially adjustable and controllable trophic organisms which affect the biomass of algae in the eutrophicated lake, and the method can play a role in the lake for a long time. In addition, high-trophic-level predation fishes arehigh in price, and aquatic proliferation of the lake can be realized by addition of the carnivorous fishes.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and in particular relates to a method for controlling algal blooms in lakes based on food webs. Background technique [0002] In recent years, with the rapid development of my country's economy, the discharge of a large amount of industrial and agricultural sewage has caused serious eutrophication of water bodies, and algal blooms have broken out in many freshwater lakes, which have had a great impact on people's life and production. The biomass of algae in lakes is the result of the joint action of environmental factors, nutrients, macrophytes, benthic organisms, zooplankton, herbivorous fishes and carnivorous fishes. These factors work together to form a complex food web. Due to the special physiological and ecological characteristics of algae, changes in any link in the food web will have a greater impact on algae. At present, there are physical, chemical and biological methods...

Claims

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Application Information

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IPC IPC(8): C02F3/32A01G33/00A01K61/10
CPCA01G33/00A01K61/10C02F3/327C02F2103/007C02F2303/20Y02A40/80Y02A40/81
Inventor 张化永田旺王中玉赵磊黄海
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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