Fish community biomass control-based method for maintaining steady state of urban grass-type lake
A biomass and fish technology, applied in chemical instruments and methods, biological water/sewage treatment, fish farming, etc., can solve the problem of weakening the downward control of zooplankton on phytoplankton, unfavorable recovery of aquatic plants or population growth, unfavorable Phytoplankton control and other issues to achieve the effect of reducing management costs
Inactive Publication Date: 2020-07-24
NANJING INST OF GEOGRAPHY & LIMNOLOGY
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Too many zooplankton-eating fish will weaken the downward control of zooplankton on phytoplankton, resulting in a large number of phytoplankton blooms; less carnivorous fish is not conducive to the control of phytoplankton; in addition, herbivorous fish and omnivorous fish Too much is not conducive to the recovery or population growth of aquatic plants. In some cases, too many herbivorous fish and omnivorous fish can even cause the grass-type "clear water" system to transform into an algae-type "turbid water" system
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0021] In the Gonghu Wetland, two small lakes were selected for the whole lake experiment. The A lake was about 52 mu, and the fish control experiment was carried out, and the B lake was about 25 mu as a control. In the fish control experiment, gillnets and ground cages were used to remove fish biomass in early September 2018, and species identification was carried out for all catches. Length (accurate to 1 mm), weight (accurate to 1 g), statistics of catch tails, and analysis of changes in fish diet composition. Three sampling points were set up in Lake A, namely sampling point 1, sampling point 2, and sampling point 3. The three sampling points of Lake A and Lake B conducts water quality monitoring.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a fish community biomass control-based method for maintaining a steady state of an urban grass-type lake. After a grass-type ecological system is constructed, by utilizing filter-feeding characteristics of different fishes, 80% of fish biomass or more is removed at a time, and it is guaranteed that carnivorous fishes of the remaining fish biomass account for 20% or more; biomass removal of fishes is performed a time according to the steps every 2-3 years, and meanwhile, it is guaranteed that the fish biomass removed each time is greater than 80% of the total biomass ofthe fishes. The method has the beneficial effects that a reasonable fish removal method, fish removal ratio and fish removal frequency are set by utilizing the filter-feeding characteristics of the different fishes, and thus, the turbidity steady state of water can be broken, and is turned into a clear water state so as to achieve the goals of maintaining the transparency of the water and stabilizing the grass-type ecological system, and the management cost of ecological restoration is reduced. In addition, caught fishes can also be sold as green high-end meat to obtain incomes.
Description
technical field [0001] The invention relates to the technical field of water body ecological environment management, and more specifically, to a method for maintaining the steady state of urban grass-type lakes based on fish community biomass regulation. Background technique [0002] After the ecological restoration of the lake in the lakeside city and the construction of the grass-type ecology has been completed, when the density of fish and other consumers in the water body is too high, the structure and function of the "clear water state" grass-type ecosystem will be degraded, and the ecological services of the grass-type ecosystem will be affected. Functions developed, optimized and integrated. At present, fish regulation is one of the most important contents of aquatic animal biomass regulation. Fish are often at the top of the food chain in aquatic ecosystems. By regulating fish, a chain reaction of "downward effect" is caused to regulate the structure and function of...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/10C02F3/32
CPCA01K61/10C02F3/327Y02A40/81
Inventor 汤祥明于谨磊韩翠敏邵克强高光
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.
