JP7216056B2 - Eelgrass bed creation method and eelgrass bed - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for creating an eelgrass bed and an eelgrass bed.

Eelgrass is an aquatic seed plant that grows in coastal sand and mud at depths of 1 to several meters in the temperate to subarctic regions of the northern hemisphere. In the past, eelgrass beds, which are large communities of eelgrass, have been produced by the stock transplanting method, in which stocks are collected from existing eelgrass beds and transplanted to the destination, or by producing seedlings from seeds collected from existing eelgrass beds and transporting them to the destination. It is created by either a young seedling transplanting method, or a seeding method in which seeds collected from an existing eelgrass bed are sown at a destination. In any of these methods, the place of construction is the local seabed or inside a container installed on the seabed (see Patent Document 1, for example).

JP 2014-100103 A

Here, referring to FIG. 3, the amount of light in water, the stability of the bottom sediment 14, and the water temperature are particularly important for the growth of eelgrass 20 . Therefore, the place where the eelgrass bed is created must be a sea area where these conditions are suitable for the growth of the eelgrass 20 . Assuming that the stability of the bottom sediment 14 is ensured, for example, in a sea area with poor seawater transparency, the water depth for creating the eelgrass bed must be shallow in order to obtain the necessary amount of underwater light. If the depth is shallow, the water temperature will be high in the summer, and there is a risk that it will not be suitable for the growth of eelgrass. Therefore, even if there is a demand to create a eelgrass bed in such a sea area, it is difficult to meet the demand because there is no place suitable for the creation.

In addition, even if the seabed 56 is deep enough to be unsuitable for the growth of eelgrass 20, although the seawater has good transparency and high water temperatures in the summer can be avoided, the lack of underwater light makes it difficult to create an eelgrass bed. Have difficulty. In any of the above-described cases, civil engineering work may be carried out in order to adjust the depth of the seabed 56 to a depth suitable for the growth of the eelgrass 20, but such construction is performed only to create the eelgrass bed. is not practical in many cases due to costs and other factors.
The present invention has been made in view of the above problems, and its object is to grow eelgrass under conditions suitable for growth regardless of the transparency of seawater.

(Mode of invention)
The following aspects of the invention exemplify configurations of the present invention, and will be described separately in order to facilitate understanding of the various configurations of the present invention. Each term does not limit the technical scope of the present invention, and while considering the best mode for carrying out the invention, replaces, deletes, or further The technical scope of the present invention can also include the addition of the constituent elements.

(1) A method for creating an eelgrass bed, in which eelgrass seeds, seedlings, or stocks are laid out together with bottom sediment in a plurality of containers with an open upper surface, and the plurality of containers are transferred from a floating body placed on the surface of the sea into the sea. A method for creating an eelgrass bed, in which the eelgrass is placed in a predetermined water depth zone in the sea by hanging the eelgrass, and the eelgrass grown in the predetermined water depth zone is used to create the eelgrass bed .

In the method for creating an eelgrass bed described in this section, first, seeds, seedlings, or stocks of eelgrass, which are the sources of the eelgrass to be grown, are spread in a plurality of containers with open tops, together with bottom sediment. . At this time, the stability of the bottom sediment is ensured by using any bottom sediment suitable for the growth of eelgrass. By suspending the plurality of containers into the sea from a floating body installed on the surface of the sea, they are installed in a predetermined depth zone in the sea. The predetermined water depth zone in this case is a water depth zone in which both underwater light intensity and water temperature suitable for the growth of eelgrass are ensured according to the transparency of the seawater of the site.

That is, in a sea area with poor seawater transparency, for example, a relatively shallow water depth zone is selected in which an appropriate amount of underwater light can be obtained and the water temperature tends to be less likely to rise due to the flow of seawater. On the other hand, in a sea area where the seawater is highly transparent, for example, a water depth zone is selected in which a sufficient amount of underwater light is ensured even though the depth is such that the water temperature is not likely to be high even in the summer. Then, eelgrass beds are created using the eelgrass grown in a plurality of containers installed in such a predetermined water depth zone. As a result, regardless of the transparency of sea water in the sea area where the site is located, an environment suitable for the growth of eelgrass is ensured for all the conditions necessary for the growth of eelgrass, such as the stability of the bottom sediment, the amount of underwater light, and the water temperature. becomes. Therefore, eelgrass can grow under conditions suitable for growth even in places where the water depth is deep down to the seabed, for example, where the use has been changed from an anchorage or lumberyard.

( 2 ) A method for creating an eelgrass bed in (1 ) above, wherein a raft for cultivating marine products is used as the floating body (claim 1 ).
The method for creating an eelgrass bed described in this section uses a raft for cultivating marine products such as oysters and scallops as a floating body used when suspending a plurality of containers from the surface of the sea into the sea. be. As a result, synergistic effects are expected between the growth of eelgrass and the cultivation of marine products, such as the supply of oxygen from the eelgrass in the container to the aquaculture area while saving the trouble of manufacturing and installing a dedicated floating body.

( 3 ) A method for creating an eelgrass bed in ( 2 ) above, wherein at least part of the locations where the plurality of containers are installed is used as it is as a eelgrass bed (claim 2).
The method for creating an eelgrass bed described in this section uses at least a part of the installation locations of a plurality of containers located in a predetermined depth zone in the sea not only as a growing place for eelgrass but also as an eelgrass bed as it is. be. As a result, even in sea areas that were previously thought to be difficult to use for eelgrass beds, an environment suitable for the growth of eelgrass can be secured as a habitat for eelgrass. It will be well made.

( 4 ) In the above items ( 2 ) and ( 3 ), a method for creating an eelgrass bed (claim Item 3).
The method for creating a eelgrass bed described in this section is to grow at least some of the eelgrass strains grown in a plurality of containers installed in a predetermined depth zone in the sea, and grow eelgrass in a different growing place than the one where the plurality of containers are installed. It is transplanted to another place to create a place. As a result, eelgrass beds grown in an environment suitable for growth are utilized to easily create eelgrass beds in various locations.

( 5 ) In items ( 2 ) to ( 4 ) above, a method for creating an eelgrass bed, wherein at least a portion of the eelgrass grown in the plurality of containers is moved together with the container to another location for creating an eelgrass bed ( Claim 4).
The method for creating a eelgrass bed described in this section is to use at least a part of eelgrass grown in a plurality of containers installed in a predetermined depth zone in the sea to create a eelgrass bed different from the growing place where the plurality of containers are installed. It is to move the whole container to another place for building. At this time, the eelgrass that has grown to a sufficient stage is moved so that a eelgrass bed is created corresponding to the environment of the destination. As a result, eelgrass beds grown in an appropriate environment can easily create eelgrass beds in various locations.

(6) In items ( 2 ) to (5) above, after the decline period of eelgrass, at least some of the plurality of containers are collected, eelgrass seeds are sown in the containers, and the collected containers are placed at the predetermined water depth. A method for creating a eelgrass bed, in which eelgrass is newly grown from eelgrass seeds in the re-installed container by re-installing it in the belt (claim 5 ).
The method for creating a eelgrass bed described in this section recycles at least some of the plurality of containers installed in a predetermined depth zone in the sea until the decline period of eelgrass passes to renew eelgrass. It is grown in That is, a container to be reused is collected from the sea, new eelgrass seeds are sown in the collected container, and the container is placed again in the same predetermined depth zone in the sea as before collection, so that the In this method, eelgrass is newly grown from eelgrass seeds. As a result, eelgrass can be repeatedly grown in an environment suitable for growth while suppressing costs without using a new container.

(7) In items ( 2 ) to (6) above, by leaving at least a part of the plurality of containers in the predetermined water depth zone after the decline period of the eelgrass, the rhizomes of the eelgrass in the remaining containers (Claim 6 ).
The method for creating an eelgrass bed described in this section involves leaving at least a portion of a plurality of containers installed in a predetermined depth zone in the sea until the decline period of eelgrass passes, and The underground stem of the eelgrass remaining in the soil is used to grow the eelgrass again. As a result, the eelgrass propagates by branching of the rhizome in an environment suitable for growth secured by a container left in a predetermined depth zone in the sea.

(8) An eelgrass bed formed by using a plurality of containers in which eelgrass seeds, seedlings, or stocks are spread inside together with bottom sediment, wherein the plurality of containers are formed from a floating body installed on the surface of the sea. A eelgrass bed that is installed in a predetermined depth zone in the sea by being suspended in the sea .
(9) An eelgrass bed in (8) above, wherein a raft for cultivating marine products is used as the floating body (claim 7 ).
Then, the eelgrass beds described in items (8) and (9) are created by the methods for creating eelgrass beds in items (2) and ( 3 ) above, respectively, and are obtained in items (2) and ( 3 ) above. This method exhibits various functions as an eelgrass bed while exhibiting the same effects as the method for creating an eelgrass bed.

Since the present invention is configured as described above, eelgrass can be grown under conditions suitable for growth regardless of the transparency of seawater.

1 is an image diagram showing an example of a configuration of an eelgrass field according to an embodiment of the present invention; FIG. FIG. 2 is a flowchart showing an example of procedures of a method for creating an eelgrass bed according to an embodiment of the present invention; It is an image diagram for explaining an environment suitable for growing eelgrass.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described based on the accompanying drawings. Here, detailed description of the same or corresponding parts as in the prior art is omitted, and the same or corresponding parts are indicated by the same reference numerals throughout the drawings.
FIG. 1 schematically shows the configuration of an eelgrass bed 10 according to an embodiment of the present invention. As shown, in the eelgrass bed 10 according to the embodiment of the present invention, a plurality of containers 12 (only two are shown in FIG. 1), which are covered with eelgrass 20 together with bottom sediment 14, are placed in predetermined locations in the sea 52. It is installed in the water depth zone 54 and formed by the eelgrass 20 grown in the plurality of containers 12 . The eelgrass 20 shown in FIG. 1 is growing in the middle of forming the eelgrass bed 10 .

For the plurality of containers 12, a bottomed container with an open top is used, for example, a rectangular container with a length and width of about 10 cm to several meters in plan view, but the top is open. It may have a shape other than a rectangle as long as it has a shape. The depth of the container 12 satisfies the depth of the bottom sediment 14 required for the growth of the eelgrass 20, and in addition, the depth of the bottom sediment 14 is such that the bottom sediment 14 does not spill out of the container 12 due to the movement of water due to waves or the like, or the rocking of the container 12 itself. Any height is acceptable. The material of the container 12 may be impermeable or permeable as long as the bottom sediment 14 does not pass through, and any material can be used. It is preferable to use a material such as

Any substrate (e.g., sand) suitable for growing eelgrass 20 may be used as substrate 14 , and eelgrass 20 may be grown from seeds within container 12 or may be transplanted into container 12 . A grown seedling or stock may also be used. A predetermined water depth zone 54 in the sea 52 in which the plurality of containers 12 are installed is set for each eelgrass bed 10 according to the transparency of seawater in the sea area where the eelgrass bed 10 is located. Specifically, in the predetermined water depth zone 54, the amount of underwater light necessary for the growth of the seagrass 20 can be obtained from the sea surface 50, and the water temperature does not become high even in summer, and the water temperature suitable for the growth of the seagrass 20 is maintained. Set to dripping depth.

A plurality of containers 12 are placed in the predetermined water depth zone 54 as described above by one of two methods. That is, one installation method is a method of suspending from a floating body 30 floating on the sea surface 50 to a predetermined water depth zone 54 in the sea 52 via a mooring rope 32, like the container 12 on the left side of FIG. As the floating body 30 used in this method, for example, a farming raft used for farming marine products such as oysters and scallops, or a specially made raft is used. However, any shape and material may be used for the floating body 30 as long as it can be stably installed on the sea surface 50 . Any mooring rope 32 that can stably suspend the container 12 can be used.

On the other hand, the other installation method, like the container 12 on the right side of FIG. 36 and float in a predetermined water depth zone 54 in the sea 52 . The floats 36 and weights 34 used in this method may be any floats and weights that balance buoyancy and weight to maintain a stable position of the container 12 . Any mooring rope 32 that stably connects the float 36 and the weight 34 may be used. Although FIG. 1 shows only two containers 12 as the plurality of containers 12, the eelgrass bed 10 according to the embodiment of the present invention is installed in the predetermined water depth zone 54 by any of the methods described above. , more containers 12 are utilized and formed.

Next, along the flow of the flow diagram shown in FIG. 2, a method for creating an eelgrass bed according to the embodiment of the present invention using eelgrass 20 grown in the environment shown in FIG. 1 will be described. Please refer to FIG. The flow diagram shown in FIG. 2 shows an example of the flow of procedures for explaining the method for creating an eelgrass bed according to the embodiment of the present invention. Therefore, the method for creating an eelgrass bed is not limited to this flow chart. For example, some of the steps shown in FIG. Alternatively, the flow may be appropriately added.

S10 (sowing or transplanting eelgrass into containers): A plurality of containers 12 are prepared on land or in the sea, and each container 12 is covered with bottom sediment 14 to a sufficient thickness (for example, about 20 cm). Seeds of eelgrass 20 are sown and further thinly covered with bottom sediment 14. - 特許庁Alternatively, seedlings or stocks of eelgrass 20 grown in another place are transplanted into a prepared container 12, and an appropriate amount of sediment 14 is spread over the container. In any case, seeding or transplanting may be carried out so that an appropriate interval is secured between adjacent eelgrass 20 in consideration of the size of the eelgrass 20 after growing. A cloth or the like may be placed between the inner surface of the bottom sediment 14 and the bottom sediment 14 . Also, when seeds are sown, a restraint such as a wire mesh may be placed on the sediment 14 .

S20 (installation of containers in the sea): The plurality of containers 12 prepared in S10 are installed in a predetermined water depth zone 54 in the sea 52 by one of the installation methods shown in FIG. At this time, all the containers 12 may be installed by one of the installation methods, or a plurality of containers 12 may be installed by dividing them into one installation method group and the other installation method group.
S30 (Growth of eelgrass): The eelgrass 20 in the containers 12 are grown in the predetermined water depth zone 54 of the sea 52 where the plurality of containers 12 are installed in S20. Here, the period for growing the eelgrass 20 depends on the usage of the eelgrass 20 determined in S40 of the next step.

S40 (determination of how to use eelgrass): Using eelgrass 20 grown in a plurality of containers 12, it is determined whether to form eelgrass beds 10 as they are, to transplant strains of eelgrass 20 to another location, or to use another method. It is determined whether to move the eelgrass 20 together with the container 12 to a place. As a result, if it is determined that the eelgrass bed 10 will be formed as it is (the "as is" route in FIG. 2), the process proceeds to S50, and if it is determined that the strain is to be transplanted (the "transplant" route in FIG. 2), the process proceeds to S120. If it is determined that the container 12 is to be moved together with the container 12 (route of "container movement" in FIG. 2), the process proceeds to S140. Any one of the three methods of use described above may be applied to all of the plurality of containers 12 in which the eelgrass 20 has grown, and the plurality of containers 12 are divided into two or three groups, Any one of the three utilization methods described above may be applied to each group.

S50 (Eelgrass field creation): In the predetermined water depth zone 54 of the sea 52 where the plurality of containers 12 are placed in S20, the eelgrass 20 sufficiently grown in the containers 12 is used to create the eelgrass bed 10 as it is. In other words, the eelgrass field 10 is created using the environment as shown in FIG. The eelgrass bed 10 exhibits functions such as a habitat for organisms, a spawning ground for fish and shellfish, a nursery for fish and shellfish, a fishing ground, and a purification function for water quality and bottom sediment. Let

S60 (determination of utilization method after decline period): In the eelgrass field 10 created in S50 above, the method of utilization after the eelgrass 20 reaches the decline period is whether to sow new seeds or to use the underground stems of the eelgrass 20. Alternatively, it is determined from those not particularly used. As a result, when it is determined to sow newly (route of "sowing" in FIG. 2), the process moves to S70, and when it is determined to use the rhizome (route of "use of underground stem" in FIG. 2), the process moves to S100, If it is determined not to be used in particular (route of "none in particular" in FIG. 2), the process proceeds to S110. Any one of the three methods of use described above may be applied to all of the plurality of containers 12 after the eelgrass 20 has declined, and the plurality of containers 12 may be divided into two or three groups. Therefore, any one of the three usage methods described above may be applied to each group.

S70 (container recovery): The container 12 determined to be used for seeding in S60 is recovered from the predetermined water depth zone 54 in the sea 52 to land or sea.
S80 (Sowing eelgrass in container): Seeds of eelgrass 20 are sown in the collected container 12 in the same manner as described in S10 above. At this time, the sediment 14 remaining in the container 12 may be reused, or new sediment 14 may be used.
S90 (reinstallation of the container in the sea): The container 12 seeded with the eelgrass 20 is re-installed in the predetermined water depth zone 54 in the sea 52 where it was placed before collection. The installation method at this time is the same as that described in S20 above. Then, by proceeding to S30 described above, the eelgrass 20 is grown from the seeds in the predetermined water depth zone 54 in the next season.

S100 (Container Leaving): The container 12 determined to use the rhizome in S60 is left as it is in a predetermined water depth zone 54 in the sea 52 . Then, the eelgrass 20 in the bottom sediment 14 is branched and propagated, and the eelgrass 20 is grown in the predetermined water depth zone 54 in the above S30 so that it grows again in the container 12 .
S110 (container recovery): The container 12 determined not to be used in S60 is recovered from the predetermined water depth zone 54 in the sea 52 onto land. At this time, the floating body 30, the mooring rope 32, the weight 34, the float 36, and the like used to set the container 12 in the predetermined water depth zone 54 are also collected at the same time. This concludes the explanation of how to create the eelgrass beds along the route.

S120 (transplantation of eelgrass stock): The eelgrass 20 that has grown to a stock in S30 is transplanted to another location for creating an eelgrass bed 10 . The transplantation destination at this time may be the seabed 56, a container installed on the seabed 56, or a container 12 installed in a predetermined water depth zone 54 in the sea 52 as shown in FIG. There may be.
S130 (Creation of eelgrass bed at transplantation destination): At the transplantation site where the strain of eelgrass 20 was transplanted in S120, the eelgrass 20 is sufficiently grown from the strain to create the eelgrass bed 10, and the function of the eelgrass bed 10 is exhibited. Let This concludes the explanation of how to create the eelgrass beds along the route.

S140 (moving eelgrass together with the container): The eelgrass 20 grown in S30 is moved together with the container 12 to another location for creating the eelgrass field 10. The timing of movement may be determined in consideration of the environment of the destination. Further, when moving, the container 12 may be installed on the seabed 56 at the destination, or may be installed at a predetermined water depth zone 54 in the sea 52 at the destination as shown in FIG.
S150 (Eelgrass field creation at destination): At the destination location where the eelgrass 20 was moved together with the container 12 in S140, according to the growth state of the eelgrass 20 at the time of movement, the eelgrass 20 that was moved creates the eelgrass field 10. Alternatively, the eelgrass 20 is sufficiently grown to create the eelgrass bed 10, and the eelgrass bed 10 exhibits its function. This concludes the explanation of how to create the eelgrass beds along the route.

Now, according to the embodiment of the present invention having the above configuration, it is possible to obtain the following effects. That is, in the method for creating an eelgrass bed according to the embodiment of the present invention, as shown in FIGS. Then, the eelgrass 20 to be grown is spread with the bottom sediment 14 (S10 in FIG. 2). At this time, the stability of the bottom sediment 14 can be ensured by using any bottom sediment 14 suitable for the growth of the seagrass 20 . Then, the plurality of containers 12 are suspended in the sea 52 from a floating body 30 installed on the sea surface 50, or floated in the sea 52 from a weight 34 installed on the seabed 56 using a float 36. 52 to a predetermined water depth zone 54 (S20 in FIG. 2). In this case, the predetermined water depth zone 54 is a water depth zone that ensures both underwater light intensity and water temperature suitable for the growth of eelgrass 20 according to the transparency of the seawater of the site.

That is, in a sea area with poor seawater transparency, for example, a relatively shallow water depth zone is selected in which an appropriate amount of underwater light can be obtained and the water temperature tends to be less likely to rise due to the flow of seawater. On the other hand, in a sea area where the seawater is highly transparent, for example, a water depth zone is selected in which a sufficient amount of underwater light is ensured even though the depth is such that the water temperature is not likely to be high even in the summer. Then, the eelgrass beds 10 are created using the eelgrass 20 grown in the plurality of containers 12 installed in such a predetermined water depth zone 54 (S30 in FIG. 2). As a result, an environment suitable for the growth of the seagrass 20 is ensured for all the conditions necessary for the growth of the seagrass 20, such as the stability of the bottom sediment 14, the amount of light in the water, and the water temperature, regardless of the transparency of the seawater in the sea area. can do. Therefore, it is possible to grow the eelgrass 20 under conditions suitable for growing even in a place where the water depth is deep down to the seabed 56, for example, where the use has been changed from an anchorage or a lumberyard.

In addition, in the method for creating an eelgrass bed according to the embodiment of the present invention, at least a part of the installation locations of the plurality of containers 12 located in the predetermined water depth zone 54 in the sea 52 is used not only as a growing place for the eelgrass 20, but also as a growing place. , may be used as it is as the eelgrass field 10 (S50 in FIG. 2). As a result, it is possible to secure an environment suitable for the growth of the eelgrass 20 as a habitat for the eelgrass 20, even in a sea area that was conventionally thought to be difficult to use for the eelgrass bed 10. It is possible to efficiently create the eelgrass bed 10 from the location.

In addition, in the method for creating an eelgrass bed according to the embodiment of the present invention, at least part of the eelgrass 20 grown in a plurality of containers 12 installed in a predetermined water depth zone 54 in the sea 52 is grown in a plurality of containers 12 may be transplanted to another place for creating the eelgrass bed 10, which is different from the growing place where the is installed (S120 in FIG. 2). As a result, it is possible to easily create eelgrass beds 10 in various places using the strains of eelgrass 20 grown in an environment suitable for growth (S130 in FIG. 2).
Furthermore, in the method for creating an eelgrass bed according to the embodiment of the present invention, at least some of the eelgrass 20 grown in a plurality of containers 12 installed in a predetermined water depth zone 54 in the sea 52 are placed in a plurality of containers 12 . The entire container 12 may be moved to another place for creating the eelgrass bed 10, which is different from the growing place where the eelgrass was grown (S140 in FIG. 2). This also makes it possible to easily create eelgrass beds 10 in various places from eelgrass 20 grown in an appropriate environment (S150 in FIG. 2).

Further, in the method for creating an eelgrass bed according to the embodiment of the present invention, at least some of the plurality of containers 12 installed in a predetermined water depth zone 54 in the sea 52 until the decline period of the eelgrass 20 has passed. 12 may be reused to grow eelgrass 20 anew. That is, the container 12 to be reused is recovered from the sea 52 (S70 in FIG. 2), seeds of eelgrass 20 are newly sown in the recovered container 12 (S80 in FIG. 2), and the container 12 is placed in the same manner as before recovery. By re-installing in the predetermined water depth zone 54 in the sea 52 (S90 in FIG. 2), the eelgrass 20 can be newly grown from the seeds of the eelgrass 20 in the container 12. FIG. As a result, it is possible to repeatedly grow the eelgrass 20 under an environment suitable for growth while suppressing costs without using a new container 12 .

Furthermore, in the method for creating an eelgrass bed according to the embodiment of the present invention, at least some of the plurality of containers 12 installed in a predetermined water depth zone 54 in the sea 52 until the decline period of the eelgrass 20 has passed. 12 may be left as it is, and the underground stems of the eelgrass 20 remaining in the left container 12 may be used to grow the eelgrass 20 again (S100 in FIG. 2). As a result, the eelgrass 20 can be propagated by branching of the rhizome in an environment suitable for growth secured by the container 12 left in the predetermined water depth zone 54 in the sea 52 .

In addition, in the method for creating an eelgrass bed according to the embodiment of the present invention, marine products such as oysters and scallops are cultivated as the floating bodies 30 used when suspending the plurality of containers 12 from the sea surface 50 to the sea 52. You can use the farming rafts As a result, a synergistic effect can be expected between the growth of the eelgrass 20 and the cultivation of marine products, such that oxygen can be supplied from the eelgrass 20 in the container 12 to the farming area while saving the trouble of manufacturing and installing the dedicated floating body 30. can do.
On the other hand, the eelgrass bed 10 according to the embodiment of the present invention is created by the above-described method for creating an eelgrass bed according to the embodiment of the present invention. Various functions as the eelgrass field 10 can be exhibited while exhibiting the same effects as.

10: Eelgrass field, 12: Multiple containers, 14: Sediment, 20: Eelgrass, 30: Floating body, 34: Weight, 36: Float, 50: Sea surface, 52: Undersea, 54: Predetermined water depth zone, 56: Seabed

Claims (7)

A method for creating an eelgrass bed,
Spread eelgrass seeds, seedlings, or stocks together with bottom sediment in a plurality of containers with open tops,
By suspending the plurality of containers into the sea from a floating body installed on the sea surface, they are installed in a predetermined depth zone in the sea,
creating an eelgrass bed using eelgrass grown in the predetermined depth zone ;
A method for creating an eelgrass bed, wherein a raft for cultivating marine products is used as the floating body . 2. The method for creating an eelgrass bed according to claim 1, wherein at least part of the locations where the plurality of containers are installed is used as it is as the eelgrass bed. 3. The method for creating an eelgrass bed according to claim 1 or 2, wherein at least some of the eelgrass strains grown in the plurality of containers are transplanted to another location for creating an eelgrass bed. 4. An eelgrass bed according to any one of claims 1 to 3, wherein at least part of the eelgrass grown in the plurality of containers is moved together with the containers to another location for creating the eelgrass beds. construction method. After the decline period of eelgrass, at least part of the plurality of containers is collected, seeds of eelgrass are sown in the containers, and the collected containers are re-installed in the predetermined water depth zone, thereby 5. The method for creating an eelgrass bed according to any one of claims 1 to 4 , wherein eelgrass is newly grown from eelgrass seeds. After the decline period of eelgrass, at least part of the plurality of containers is left in the predetermined water depth zone as it is, so that the underground stems of the eelgrass in the remaining containers are used to grow the eelgrass again. The method for creating an eelgrass bed according to any one of claims 1 to 5 . An eelgrass bed formed using a plurality of containers in which eelgrass seeds, seedlings, or stocks are spread inside together with sediment,
The plurality of containers are installed in a predetermined depth zone in the sea by being suspended into the sea from a floating body installed on the surface of the sea ,
An eelgrass bed, wherein a raft for cultivating marine products is used as the floating body .

Images