Device and method for collecting sediment surface sedimentation aquatic plant propagule banks

A collection device and surface subsidence technology are applied in the field of collection devices and methods for sediment surface subsidence aquatic plant propagule banks, which can solve problems such as uneliminated plant decline, avoid feeding, prevent separation from the collection device, and inhibit agitation. Effect

Pending Publication Date: 2018-11-13
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Determining the size of the propagule pool is an important prerequisite for restoring aquatic plants and studying the regeneration characteristics of plant communities. Some ecological restoration projects have blindly introduced a large number of aquatic plant seedlings to restore aquatic plants without investigating the propagule pool, and have not eliminated the resulting A key factor in plant decline, leading to many failure cases

Method used

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  • Device and method for collecting sediment surface sedimentation aquatic plant propagule banks
  • Device and method for collecting sediment surface sedimentation aquatic plant propagule banks
  • Device and method for collecting sediment surface sedimentation aquatic plant propagule banks

Examples

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Effect test

Embodiment 1

[0039] Such as Figure 1-9 As shown, the collecting device of the present invention comprises the largest propagule bank collecting device, the actual propagule bank collecting device and the fixing device;

[0040] Such as figure 1As shown, the collection device for the largest propagule bank includes a drum 1, a fixed support 6, a first screen 2, a second screen 3, a gill net 4 and a barbed wire 5, and the barbed wire 5 is welded on a flat steel Made of several stainless steel nails, the gill net 4 is a mesh structure with barbed wire 5 fixed on the surface; net 4 and barbed wire 5; the specification of the second screen 3 is 8 mesh, fixed at 10 mm above the bottom of the drum; the specification of the second screen 2 is 2 mesh, fixed above the first screen 3, and the A sieve 3 distance 20mm. Fix the gillnet 4 at 20mm above the first screen 2, and the aperture of the gillnet 4 is 30mm*30mm; the top of the gillnet 4 is fixed upwards along the inner wall of the cylinder 1 i...

Embodiment 2

[0047] In this embodiment, the study of the characteristics of newborn seed banks on the sediment surface near Yushan Island in the eastern part of Taihu Lake is taken as an example to illustrate the application example of the collection device of the present invention.

[0048] The device described in Example 1 is arranged on the surface of the sediment. After a week of arrangement, the divers dive into the water body and cover a layer of 200 mesh nylon nets respectively on the drums of the largest propagule bank collection device and the actual propagule bank collection device. After the largest propagule bank collection device and the actual propagule bank collection device were raised from the water surface, they were brought into the laboratory for analysis. The results show that the collection device can capture seeds and fragments of various plants and other asexual propagules, and the collected seeds include the seeds of bitter grass with a length and width less than 1m...

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Abstract

The invention relates to a device and a method for collecting sediment surface sedimentation aquatic plant propagule banks. The device comprises a largest propagule bank collecting device, an actual propagule bank device and a fixing device; the largest propagule bank collecting device comprises a barrel, a fixed bracket, a sieve net, a gill net and a barbed wire; the fixed bracket is arranged inthe barrel and is used for fixing the sieve net, the gill net and the barbed wire; the sieve net is fixed above the bottom of the barrel; the gill net is fixed on the sieve net; 3 loops of barbed wires are sequentially fixed above the gill net along the upward direction of the inner wall of the barrel; and the sieve net is removed from the actual propagule bank device and the distance between thebarbed wires is adjusted, so that aquatic animals can eat normally propagules and the actual propagule generation quantity on the sediment surface under the natural condition is obtained. Scientific evaluation on the propagule condition of large aquatic plants needs to comprehensively evaluate the number of seeds and asexual propagules newly settled on the sediment surface.

Description

technical field [0001] The invention relates to a collection device and method for a subsidence aquatic plant propagule bank on the surface of sediments, which can provide important data support for the study of large-scale aquatic plant community renewal and plant restoration. Background technique [0002] Macroscopic aquatic plants are the main primary producers of aquatic ecosystems, regulating the circulation of substances and energy flows within the aquatic environment system, and also play a vital role in maintaining the structure and function of freshwater ecosystems. Aquatic plants can provide food sources, habitats, and reproductive substrates for a variety of organisms, so a healthy large aquatic plant community is conducive to improving the biodiversity and stability of the lake ecosystem. With the aggravation of eutrophication in lakes, the decline of aquatic vegetation, especially submerged vegetation, is a common phenomenon worldwide. Water pollution and the di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/04
CPCG01N1/04
Inventor 黄蔚陈开宁汤同欢温超男
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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