Oyster reef structure and oyster configuration method using the same

Abstract

The application discloses an oyster reef structure and an oyster arrangement method using the same, and belongs to the field of oyster culture. The oyster reef structure comprises an upper edge of the oyster reef structure, a hollow structure, and a lower edge of the oyster reef structure. The upper edge of the oyster reef structure is arranged on the top of the hollow structure, and the lower edge of the oyster reef structure is arranged on the bottom of the hollow structure. The oyster reef structure can play a role in weakening waves and currents, increasing the attachment area of oysters, and facilitating the growth, habitation and reproduction of oysters. The hollow structure in the middle of the oyster reef can facilitate water exchange, reduce silt deposition, and provide a sheltering and inhabiting environment for oysters and other marine organisms. In addition, through the oyster reef arrangement method, a stable ecological system with biological diversity suitable for marine organisms to inhabit can be formed after a certain period of time after the oysters are attached.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of marine ecological restoration, in particular to an oyster reef structure and an oyster configuration method using the same. BACKGROUND

[0002] At present, the related technologies for repairing oyster reefs at home and abroad are still relatively scarce. Although various types of oyster reefs currently used can effectively protect seawalls or other marine projects from erosion and damage, the production difficulty is relatively high. The internal and external space of the oyster reef is small, and the biological attachment area is small, which cannot meet the habitat and attachment needs of various organisms, and is not conducive to water exchange. Therefore, it is urgent to provide an oyster reef with a large attachment area, high water permeability and good resistance to wave and current impact for use in marine ecological restoration engineering. Moreover, the existing oyster configuration method has poor effect, low survival rate, and has a certain impact on the marine environment. SUMMARY

[0003] The technical problem to be solved by the present application is to provide an oyster reef structure and an oyster configuration method using the same to solve the above problems.

[0004] The present application is achieved by the following technical solutions.

[0005] The oyster reef structure of the present application comprises an oyster reef structure upper edge, a hollow structure, and an oyster reef structure lower edge, wherein the oyster reef structure upper edge is installed at the top of the hollow structure, and the oyster reef structure lower edge is installed at the bottom of the hollow structure.

[0006] Further, the hollow structure is a prefabricated hollow cylindrical reinforced concrete.

[0007] Further, the oyster reef structure upper edge has a width of 2.0 m, the oyster reef structure lower edge has a width of 2.0 m, the longitudinal length of the oyster reef structure upper edge and the oyster reef structure lower edge is 2.0 m, the height between the oyster reef structure upper edge and the oyster reef structure lower edge is between 0.6 m and 1.0 m, and the single weight control is between 2.5 t and 3.5 t.

[0008] Further, the hollow structure has an internal diameter of 0.6 m and a height of 0.2-0.6 m.

[0009] Further, the oyster reef structure upper edge, the hollow structure, and the oyster reef structure lower edge are made of C35 concrete material, and the reinforcing steel bars are HRB400.

[0010] Further, the structure surface of the oyster reef structure upper edge, the hollow structure, and the oyster reef structure lower edge and the interior of the hollow body are formed with a roughened surface.

[0011] A method for oyster arrangement in an oyster reef structure:

[0012] S1: Select the oyster species and the placement location and height of the oyster reef structure based on the temperature of the placement location;

[0013] S2: Secure the oyster shells to the rope;

[0014] S3: Each rope holds the same number of oyster shells, forming an oyster reef unit;

[0015] S4: Attach the formed oyster reef subunits to the oyster reef structure.

[0016] Furthermore, according to step S2 above, the rope is selected as a brown rope with a diameter of 0.3-0.5m, and the spacing between adjacent oyster shells is 3-5cm.

[0017] Furthermore, according to step S3 above, 20-40 oyster shells are fixed on each brown rope to form an oyster reef unit.

[0018] Furthermore, according to step S4 above, 3-5 oyster reef sub-units are attached to the oyster reef structure.

[0019] The beneficial effects of this invention are as follows: The oyster reef structure of this invention can dampen waves and currents, increase the attachment area for oysters, and facilitate oyster growth, habitat, and reproduction. The hollow structure in the middle of the oyster reef facilitates water exchange, reduces siltation, and provides shelter and habitat for oysters and other marine life. Furthermore, through the oyster reef configuration method, after oysters attach and a certain period of time, a stable ecosystem with biodiversity suitable for marine life can be formed. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of an embodiment of the present invention. Detailed Implementation

[0022] The following is combined Figure 1 The present invention will be described in detail below. For ease of description, the directions referred to below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The directions of the projection relationship are consistent in all directions: up, down, left, right, front, and back.

[0023] Combined with appendixFigure 1 The oyster reef structure includes an oyster reef structure upper edge 2, a hollow structure 1, an oyster reef structure lower edge 3, the oyster reef structure upper edge 2 is installed at the top of the hollow structure 1, and the oyster reef structure lower edge 3 is installed at the bottom of the hollow structure 1.

[0024] The hollow structure 1 is a prefabricated hollow cylindrical reinforced concrete, and the cylindrical shape is less affected by waves and water flow, and can achieve excellent force unloading and flow distribution effects on ocean currents.

[0025] The width of the oyster reef structure upper edge 2 is 2.0m, the width of the oyster reef structure lower edge 3 is 2.0m, the longitudinal length of the oyster reef structure upper edge 2 and the oyster reef structure lower edge 3 is 2.0m, the height between the oyster reef structure upper edge 2 and the oyster reef structure lower edge 3 is between 0.6m and 1.0m, and the single weight control is between 2.5t and 3.5t.

[0026] The oyster reef structure upper edge 2 and the oyster reef structure lower edge 3 are preferably square plates, which can keep the oyster reef structure stable, and the upper and lower edges are equal in size, which is convenient for placement. The square plate can bring the advantages of convenient connection, uniform stress and good support.

[0027] The inner diameter of the hollow structure 1 is 0.6m, and the height is 0.2-0.6m, which is adjusted according to the depth of the river channel at the placement position. The height is selected to best meet the growth requirements of oysters.

[0028] The oyster reef structure upper edge 2, the hollow structure 1, and the oyster reef structure lower edge 3 all use C35 concrete material, and the steel bar is HRB400.

[0029] The surface of the oyster reef structure upper edge 2, the hollow structure 1, and the oyster reef structure lower edge 3 and the inside of the hollow body are all formed into a rough surface, which can make oysters better adhere to the surface of the oyster reef structure and not fall off under the impact of waves and tidal currents.

[0030] The oyster reef structure of the present application can be individually arranged, and a space allowance is left between multiple oyster reef structures, which can configure more oysters on a single oyster reef structure for their growth, or connect multiple oyster reef structures into a whole for arrangement, which is convenient for taking and placing the oyster reef structure.

[0031] When multiple oyster reef structures are connected and arranged, the connection of the whole reef body has sufficient internal and external structures to meet the environment for the attachment and habitat of various marine organisms, and the open rate can reach more than 70%, which is suitable for aquaculture and can greatly improve the output of fishery aquaculture.

[0032] An oyster configuration method: the oyster reef surface oyster configuration method,

[0033] S1: Select oyster species according to temperature, and the placement position and height of oyster reef structure;

[0034] S2: Fix oyster shells on the rope

[0035] S3: The same number of oyster shells are fixed on each rope to form oyster reef subunits

[0036] S4: Fix the formed oyster reef subunits on the oyster reef structure

[0037] According to the above step S2, the rope is selected to be a brown rope with a diameter of 0.3-0.5 m, and the spacing between adjacent oyster shells is 3-5 cm.

[0038] According to the above step S3, 20-40 oyster shells are fixed on each brown rope to form oyster reef subunits.

[0039] According to the above step S4, 3-5 oyster reef subunits are bound on the oyster reef structure.

[0040] According to the temperature of the installation position, oyster species that can adapt to the temperature of the position are selected, such as the suitable temperature for the growth and reproduction of Crassostrea ariakensis and Crassostrea gigas is 20-26℃, and the suitable temperature for the growth and reproduction of Crassostrea hongkongensis is 24-31℃; At the same time, the placement position and height of the oyster reef structure are also considered, generally requiring that the oyster is exposed to water for no more than 4 hours, and the sea area with a wave height of less than 2 m. The maximum height of the oyster reef structure described in the present application is only 0.6 m, which can completely satisfy the longest time of oyster exposure to water. In addition, the oyster reef structure is heavy and has high stability, and can adapt to sea areas with a wave height of more than 2 m, and when impacted by ocean currents, the oyster reef structure will not displace.

[0041] The oyster shells are fixed on the brown rope with a diameter of 0.3-0.5 m by means of clamping or inserting, and the oysters are stably fixed on the brown rope. The brown rope can make the oysters better adsorb on it, and the brown rope can be placed in water for a long time without problems such as rotting or breaking. The binding of the brown rope on the oyster reef structure enhances the marine biological enrichment capacity, and can improve the biomass and biological density of animals and plants on the surface of the oyster reef structure in a relatively short time, providing shelter and breeding sites for marine animals.

[0042] The spacing between the oyster shells can be 3-5 cm, and 20-40 oyster shells are fixed on each brown rope to form oyster reef subunits. The spacing between individual oysters allows the oysters to grow without being squeezed or folded, and leaves a margin for the volume of the oysters after growth, so that the oysters can still fully contact with the water flow after growing, improve their survival rate, and have a larger volume.

[0043] According to the size of the oyster reef structure, 3-5 oyster reef subunits are selected and bound to the oyster reef structure, preferably by transversely surrounding the oyster reef structure, and the oyster subunits are bound to the oyster reef structure by using a palm rope.

[0044] The oyster reef configuration method described in the embodiment can bring ecological benefits such as water purification and fishery resource proliferation.

[0045] The oyster release time should be suitable for the rapid growth of oysters, and generally from May to August is appropriate. The release time should be selected when the tidal current speed is slow during the neap tide period or the spring tide period, so as to reduce the loss of oyster larvae washed away from the oyster reef structure by the large flow rate, and to avoid strong sunlight, heavy rain or weather with wind above 7 levels, so that the oysters can grow safely and stably.

[0046] The oyster reef structure described in the embodiment can completely meet the longest time of oysters exposed to the water surface. The oyster reef structure has large weight and high stability, and can adapt to larger wave height and current flow rate. In addition, the swimming ability of oyster larvae is very weak, and they mainly float with the current. The oyster structure in the embodiment is beneficial to the fixation and metamorphosis of oyster larvae.

[0047] In the embodiment, after the oyster reef is put into the sea, the staff periodically investigates the species composition, biological density and biomass of the organisms attached to the reef body every two to three years.

[0048] The better investigation method of attached organisms is as follows: the oyster reef structure is hoisted to the land to investigate the biological attachment on the oyster reef on site; the underwater sampling investigation is conducted by divers using a quadrat frame; and the underwater video shooting is conducted. The investigation structure is recorded to facilitate the monitoring of the release location, release quantity and release density, so as to adjust the release conditions and achieve better release effect.

[0049] The oyster reef configuration material adopted in the embodiment is oyster shell and palm rope, which are both natural materials, have good ecological properties, are easy to degrade, and will not pollute the marine environment. At the same time, the palm rope bound to the oyster reef structure enhances the enrichment capacity of marine organisms, and can improve the biomass and biological density of animals and plants on the surface of the oyster reef structure in a short period of time, so as to provide shelter and breeding sites for marine animals.

[0050] In the embodiment, before the formal configuration of the oyster reef structure, a preliminary test is needed to verify the ecological suitability of the selected species in the region and the feasibility of the repair technology. The main purpose is to determine which of the two release forms is better. One is to directly place the oyster larvae on the test block, and the other is to first fix the oyster larvae on the culture rope and then fix them on the test block after stabilization.

[0051] The following two methods are used for the test: (1) in the seedling pool, the attached blocks are directly inoculated and attached, and after being fixed and stabilized, the on-site test is carried out; (2) in the seedling pool, the attached blocks are first attached and fixed on the culture rope, and after being stabilized, the on-site test is carried out. In order to prevent the oyster reef structure from being buried by silt, the blocks need to be horizontally fixed with fixing piles, and when inspecting, the blocks can be lifted for inspection.

[0052] The experimental results show that: the oyster enrichment capacity of the oyster fixed on the culture rope and then fixed on the test block is 9-12 times higher than that of the oyster directly attached on the block, and the survival rate of the oyster and other marine organisms reaches more than 90%, which is 2-3 times higher than that of the oyster directly attached on the block.

[0053] The oyster reef structure adopted by the present application not only has high porosity and large permeability, but also saves materials and causes less damage to the ecological environment, thereby reducing the carbon emission to a certain extent. The hollow structure design not only effectively reduces the harm caused by hydration heat in the production process, but also avoids the early cracking of concrete. The height of the oyster reef structure can be adjusted according to the changes of the tidal level and geological conditions of the repair area. The oyster reef and oyster configuration method adopted by the present application has the characteristics of environmental friendliness, ecology, high seedling efficiency and survival rate, and fast growth speed, and overcomes the difficulties of poor ecological environmental friendliness of the current oyster reef attachment material and low seedling efficiency, growth, survival and reproduction efficiency of the reef body.

[0054] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. An oyster reef structure, characterized in that: It includes an upper edge (2) of an oyster reef structure, a hollow structure (1), and a lower edge (3) of an oyster reef structure. The upper edge (2) of the oyster reef structure is installed on the top of the hollow structure (1), and the lower edge (3) of the oyster reef structure is installed on the bottom of the hollow structure (1). The width of the upper edge (2) of the oyster reef structure is set to 2.0m, the width of the lower edge (3) of the oyster reef structure is set to 2.0m, the longitudinal length of the upper edge (2) and the lower edge (3) of the oyster reef structure is 2.0m, the height between the upper edge (2) and the lower edge (3) of the oyster reef structure is between 0.6m and 1.0m, and the single weight is controlled between 2.5t and 3.5t; The upper edge (2) and lower edge (3) of the oyster reef structure are square plates.

2. The oyster reef structure according to claim 1, characterized in that: The hollow structure (1) is a precast hollow cylindrical reinforced concrete structure.

3. The oyster reef structure according to claim 2, characterized in that: The hollow structure (1) has an internal diameter of 0.6m and a height of 0.2-0.6m.

4. The oyster reef structure according to claim 1, characterized in that: The upper edge (2), hollow structure (1), and lower edge (3) of the oyster reef structure are all made of C35 concrete and reinforced with HRB400 steel bars.

5. The oyster reef structure according to claim 1, characterized in that: The upper edge (2), hollow structure (1), lower edge (3) of oyster reef structure and hollow body all have roughened surfaces.

6. A method for oyster configuration based on any one of claims 1-5 of an oyster reef structure, characterized in that: S1: Select the oyster species and the placement location and height of the oyster reef structure based on the temperature of the placement location; S2: Secure the oyster shells to the rope; S3: Each rope holds the same number of oyster shells, forming an oyster reef unit; S4: Attach the formed oyster reef subunits to the oyster reef structure; According to step S2 above, the rope is selected as a brown rope with a diameter of 0.3-0.5m, and the distance between adjacent oyster shells is 3-5cm; According to step S3 above, 20-40 oyster shells are fixed on each brown rope to form an oyster reef unit; According to step S4 above, 3-5 oyster reef sub-units are tied to the oyster reef structure; the oyster sub-units are tied to the oyster reef knot by wrapping them horizontally with hemp rope.

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