A method for evaluating carbon sink efficiency of shellfish and algae in different regions

Abstract

The present invention discloses a method for evaluating carbon fixation efficiency of shellfish algae carbon sink in different regions, comprising the following steps: combining the individual average carbon fixation amount and average growth cycle of the cultivated shellfish algae varieties in the region, calculating the carbon fixation efficiency contribution factor of the shellfish algae varieties; calculating the total carbon fixation amount based on the annual output and dry-wet ratio, mass ratio, and carbon content parameters of different shellfish algae varieties; obtaining the carbon fixation amount corresponding to the unit output and the unit area based on the shellfish algae cultivation output, cultivation area, and total carbon fixation amount, and calculating the carbon fixation efficiency contribution factor of the unit production capacity; calculating the carbon fixation efficiency contribution factor of the relevant input based on the total carbon fixation amount, the number of seedlings, and the number of employees; calculating the comprehensive carbon fixation efficiency of the shellfish algae carbon sink in the region based on the carbon fixation efficiency contribution factor and weight coefficient of the shellfish algae varieties, unit production capacity, and personnel input in the region. The present invention analyzes the carbon fixation efficiency of shellfish algae carbon sink in different regions by combining multiple factors, and provides support for the carbon sink benefit evaluation of shellfish algae fisheries in different regions.

Description

Technical Field

[0001] The invention belongs to the technical field of shellfish carbon sink, and in particular relates to a method for evaluating the carbon fixation efficiency of shellfish and algae carbon sinks in different regions. Background Art

[0002] Shellfish and algae aquaculture fishery production activities promote aquatic organisms to absorb carbon dioxide in the water and remove carbon from the water through harvesting. Many coastal provinces are involved in shellfish and algae aquaculture activities, and the cultivated shellfish and algae species include oysters, scallops, mussels, clams and other shellfish, kelp, wakame, laver, river sedge and other algae.

[0003] Analyzing the carbon sequestration efficiency of shellfish and algae in different regions by comprehensively considering multiple factors will help to more comprehensively grasp the carbon sequestration information of shellfish and algae in different regions, provide support for the carbon sequestration benefit assessment of shellfish and algae fisheries in different regions, and guide scientific decision-making in the development of shellfish and algae carbon sinks.

[0004] Since 2022, Fujian, Zhejiang and other places in my country have carried out exploration of carbon sink development in shellfish aquaculture fisheries. Domestic scholars have conducted experimental research on the carbon content parameters of different species of shellfish and algae, providing a basis for the calculation of shellfish and algae carbon sinks. At present, we lack research on the carbon sink capacity of shellfish and algae in other regions. In addition to being affected by the carbon fixation capacity of shellfish and algae species, the carbon sequestration efficiency of shellfish and algae carbon sinks in different regions is also closely related to the shellfish and algae aquaculture output and aquaculture inputs in the region. Summary of the invention

[0005] The problem to be solved by the present invention is to provide a method for evaluating the carbon sink and carbon fixation efficiency of shellfish and algae in different regions. The method comprehensively analyzes the carbon sink and carbon fixation efficiency of shellfish and algae in different regions, and provides support for the carbon sink benefit evaluation of shellfish and algae fisheries in different regions.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for evaluating the carbon sink and carbon fixation efficiency of shellfish and algae in different regions, comprising the following steps:

[0007] S1: Calculate the carbon fixation efficiency contribution factor of shellfish and algae species based on the average individual carbon fixation amount and average growth period of typical cultured shellfish and algae species in the region;

[0008] S2: Calculate the total carbon fixation based on the annual production and dry-wet ratio, mass ratio, and carbon content parameters of different shellfish algae species;

[0009] S3: Based on the shellfish and algae aquaculture output, aquaculture area, and total carbon fixation, the carbon fixation amount corresponding to unit output and unit area is obtained, and the carbon fixation efficiency contribution factor per unit production capacity is calculated;

[0010] S4: Based on the total carbon sequestration amount, the number of seedlings, and the number of employees, calculate the carbon sequestration efficiency contribution factor of the relevant inputs;

[0011] S5: Based on the carbon sequestration efficiency contribution factors and weight coefficients of the shellfish and algae species, unit production capacity and personnel input in the region, calculate the comprehensive carbon sequestration efficiency of the shellfish and algae carbon sink in the region.

[0012] Furthermore, in S1, the calculation formula of the carbon fixation efficiency contribution factor of the shellfish algae species is as follows:

[0013] Among them, B0 is the average carbon fixation amount of individual shellfish and algae, T is the average growth period, and the species are divided into three categories: high carbon fixation species, medium carbon fixation species, and low carbon fixation species according to the calculation results, and the carbon fixation efficiency factor I1 is determined.

[0014] Furthermore, in S2, the annual total carbon fixation amount of the shellfish algae is calculated as follows:

[0015] C=∑C 1i +∑C 2j

[0016] Among them, i represents different shellfish species in the region, and j represents different algae species in the region;

[0017] C1=P1×W1×M1×F1+(1-M1)×F′1

[0018] Among them, C1 is the annual carbon fixation of shellfish, P1 is the annual wet weight of shellfish production, W1 is the dry-wet ratio of shellfish, M1 is the shell mass ratio of shellfish, F1 is the carbon content of shellfish shells, and F'1 is the carbon content of shellfish soft tissues;

[0019] C2=P2×W2×F2

[0020] Among them, C2 is the annual carbon fixation of algae, P2 is the annual wet weight of algae production, W2 is the dry-wet ratio of algae, and F2 is the carbon content of algae.

[0021] Furthermore, in S3, the carbon fixation amount corresponding to the unit output is calculated as follows:

[0022]

[0023] Among them, D1 is the carbon fixation corresponding to unit output, P1 is the annual output of shellfish, P2 is the annual output of algae, C is the total carbon fixation of shellfish and algae, i is the different shellfish species in the region, and j is the different algae species in the region.

[0024] Furthermore, in S3, the carbon fixation amount per unit area is calculated as follows:

[0025]

[0026] Among them, D2 is the carbon fixation per unit area, S1 is the annual production of shellfish, S2 is the annual production of algae, C is the total carbon fixation of shellfish and algae, i is the different shellfish species in the area, and j is the different algae species in the area.

[0027] Furthermore, in S3, the carbon sequestration efficiency contribution factor per unit production capacity is divided into three categories: high carbon sequestration per unit production capacity, medium carbon sequestration per unit production capacity, and low carbon sequestration per unit production capacity according to the output and area corresponding to the unit carbon sink amount, and the carbon sequestration efficiency factor I2 is determined.

[0028] Furthermore, in S4, the carbon fixation amount corresponding to the seedling input is calculated as follows:

[0029]

[0030] Among them, E1 is the carbon fixation corresponding to unit seedlings, Z1 is the number of shellfish seedlings, Z2 is the number of algae seedlings, C is the total carbon fixation of shellfish and algae, i is the different shellfish species in the area, and j is the different algae species in the area.

[0031] Furthermore, in S4, the personnel input corresponding carbon fixation amount, and the calculation formula is as follows:

[0032]

[0033] Among them, E1 is the carbon fixation per unit person, R is the number of people engaged in aquaculture, and C is the total carbon fixation of shellfish and algae.

[0034] Furthermore, in S4, the carbon fixation efficiency contribution factor per unit input is divided into three categories: high-input carbon fixation, medium-input carbon fixation, and low-input carbon fixation according to the carbon fixation amount per unit seedling and per unit personnel, and the carbon fixation efficiency factor I3 is determined.

[0035] Furthermore, the comprehensive carbon fixation efficiency of the algae carbon sink in this area is calculated as follows:

[0036] ∑ω i I i

[0037] Where I is the comprehensive carbon fixation efficiency index, ω i is the carbon fixation efficiency weight coefficient, I i The carbon fixation efficiency factor is determined by the expert experience method, and the carbon fixation efficiency weight coefficients ω1, ω2, and ω3 of the shellfish and algae species, unit production capacity, and personnel input are determined.

[0038] The advantages and positive effects of the present invention are:

[0039] The present invention analyzes the carbon sink and carbon fixation efficiency of shellfish and algae in different regions by combining multiple factors, and provides support for the carbon sink benefit assessment of shellfish and algae fisheries in different regions. The carbon sink and carbon fixation efficiency of shellfish and algae in different regions is comprehensively assessed based on the carbon fixation capacity of typical cultured shellfish and algae varieties in different regions, the culture output and area, seedlings and personnel input factors; the calculation method for carbon sink benefit assessment of shellfish and algae fisheries in different regions is simple and easy to implement; the data used for the carbon sink and carbon fixation efficiency assessment of shellfish and algae in different regions are all public data and updated every year, which is conducive to ensuring the continuous assessment of the carbon sink efficiency of shellfish and algae. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall process of an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0045] like Figure 1 As shown, a method for evaluating the carbon sink efficiency of shellfish and algae in different regions includes the following steps:

[0046] S1: Calculate the carbon fixation efficiency contribution factor of shellfish and algae species based on the average individual carbon fixation amount and average growth cycle of typical aquaculture shellfish and algae species in the region. Specifically, the calculation formula for the carbon fixation efficiency contribution factor of shellfish and algae species is as follows:

[0047] Among them, B0 is the average carbon fixation amount of individual shellfish and algae, T is the average growth period, and the species are divided into three categories: high carbon fixation species, medium carbon fixation species, and low carbon fixation species according to the calculation results, and the carbon fixation efficiency factor I1 is determined.

[0048] S2: Calculate the total carbon fixation based on the annual production and dry-wet ratio, mass ratio, and carbon content parameters of different shellfish algae species. Specifically, the annual total carbon fixation calculation formula of the shellfish algae is as follows:

[0049] C=∑C 1i +∑C 2j

[0050] Among them, i represents different shellfish species in the region, and j represents different algae species in the region;

[0051] C1=P1×W1×M1×F1+(1-M1)×F′1

[0052] Among them, C1 is the annual carbon fixation of shellfish, P1 is the annual wet weight of shellfish production, W1 is the dry-wet ratio of shellfish, M1 is the shell mass ratio of shellfish, F1 is the carbon content of shellfish shells, and F'1 is the carbon content of shellfish soft tissues;

[0053] C2=P2×W2×F2

[0054] Among them, C2 is the annual carbon fixation of algae, P2 is the annual wet weight of algae production, W2 is the dry-wet ratio of algae, and F2 is the carbon content of algae.

[0055] S3: Based on the output of shellfish and algae farming, farming area, and total carbon fixation, the carbon fixation amount corresponding to unit output and unit area is obtained, and the carbon fixation efficiency contribution factor per unit production capacity is calculated. Specifically, the carbon fixation amount corresponding to unit output is calculated as follows:

[0056]

[0057] Among them, D1 is the carbon fixation corresponding to unit output, P1 is the annual output of shellfish, P2 is the annual output of algae, C is the total carbon fixation of shellfish and algae, i is the different shellfish species in the region, and j is the different algae species in the region.

[0058] The carbon fixation per unit area is calculated as follows:

[0059]

[0060] Among them, D2 is the carbon fixation per unit area, S1 is the annual production of shellfish, S2 is the annual production of algae, C is the total carbon fixation of shellfish and algae, i is the different shellfish species in the area, and j is the different algae species in the area.

[0061] The carbon sequestration efficiency contribution factor per unit production capacity is divided into three categories: high carbon sequestration per unit production capacity, medium carbon sequestration per unit production capacity, and low carbon sequestration per unit production capacity according to the output and area corresponding to the unit carbon sink, and the carbon sequestration efficiency factor I2 is determined.

[0062] S4: Based on the total carbon sequestration, the number of seedlings, and the number of employees, calculate the carbon sequestration efficiency contribution factor of the relevant input. Specifically, the carbon sequestration amount corresponding to the seedling input is calculated as follows:

[0063]

[0064] Among them, E1 is the carbon fixation corresponding to unit seedlings, Z1 is the number of shellfish seedlings, Z2 is the number of algae seedlings, C is the total carbon fixation of shellfish and algae, i is the different shellfish species in the area, and j is the different algae species in the area.

[0065] The carbon fixation amount corresponding to the personnel input is calculated as follows:

[0066]

[0067] Among them, E1 is the carbon fixation per unit person, R is the number of people engaged in aquaculture, and C is the total carbon fixation of shellfish and algae.

[0068] The carbon sequestration efficiency contribution factor per unit input is divided into three categories: high-input carbon sequestration, medium-input carbon sequestration, and low-input carbon sequestration according to the carbon sequestration amount per unit seedling and per unit personnel, and the carbon sequestration efficiency factor I3 is determined.

[0069] S5: Based on the carbon sequestration efficiency contribution factors and weight coefficients of the shellfish and algae species, unit production capacity and personnel input in the region, calculate the comprehensive carbon sequestration efficiency of the shellfish and algae carbon sink in the region. Specifically, the comprehensive carbon sequestration efficiency of the shellfish and algae carbon sink in the region is calculated as follows:

[0070] I=∑ω i I i

[0071] Where I is the comprehensive carbon fixation efficiency index, ω i is the carbon fixation efficiency weight coefficient, I i The carbon fixation efficiency factor is determined by the expert experience method, and the carbon fixation efficiency weight coefficients ω1, ω2, and ω3 of the shellfish and algae species, unit production capacity, and personnel input are determined.

[0072] The following is an evaluation of the comprehensive carbon fixation efficiency of shellfish and algae in Liaoning and Fujian provinces based on the shellfish aquaculture species, aquaculture output, aquaculture area, seedling quantity and personnel input in Liaoning and Fujian provinces in the 2023 China Fisheries Statistical Yearbook. Specifically, the data used for the calculation are shown in Table 1-3.

[0073] Table 1 Shellfish farming data in Liaoning Province

[0074]

[0075] Table 2 Shellfish farming data in Fujian Province

[0076]

[0077]

[0078] Table 3 Dry-wet ratio, mass ratio and carbon content of shellfish cultured in my country

[0079]

[0080] The calculation steps for evaluating the carbon sequestration efficiency of shellfish in Liaoning Province are as follows:

[0081] S1: The main farmed shellfish species in Liaoning Province are oysters, mussels, scallops, clams, cockles and razor clams, which are high carbon fixation species. The carbon fixation efficiency contribution factor of shellfish species, the carbon fixation efficiency factor I1, is 8.

[0082] S2: The total annual carbon fixation of shellfish in Liaoning Province is calculated based on the shellfish production, dry-wet ratio, mass ratio and carbon content in Tables 1 and 3. The shellfish carbon fixation C1 is 193.105 million tons.

[0083] S3: The carbon fixation amount D1 corresponding to the unit output of shellfish in Liaoning Province is calculated based on the total carbon fixation amount and total output, and D1 is 0.077.

[0084] The carbon fixation amount D2 corresponding to unit area of ​​shellfish in Liaoning Province is calculated based on the total carbon fixation amount and total area, and D2 is 0.434.

[0085] The carbon sequestration efficiency contribution factors per unit production capacity in Liaoning Province are divided into three categories: high carbon sequestration per unit production capacity, medium carbon sequestration per unit production capacity, and low carbon sequestration per unit production capacity according to the output and area corresponding to the unit carbon sink, and the contribution factor values ​​are 8, 5, and 3 respectively. This example is medium carbon sequestration per unit production capacity, and the carbon sequestration efficiency factor I2 is 5.

[0086] S4: The carbon fixation amount E1 corresponding to seedling input in Liaoning Province is calculated based on the total carbon fixation amount and the number of seedlings, and E1 is 0.0376.

[0087] The carbon sequestration amount E2 corresponding to the personnel input in Liaoning Province is calculated based on the total carbon sequestration amount and the number of personnel, and E2 is 3.37.

[0088] The contribution factors of carbon sequestration efficiency per unit input in Liaoning Province are divided into three categories: low-input carbon sequestration, medium-input carbon sequestration, and high-input carbon sequestration according to the carbon sequestration amount per unit seedling and per unit personnel, and the contribution factor values ​​are 8, 5, and 3 respectively. This example is low-input carbon sequestration, and the carbon sequestration efficiency factor I3 is 8.

[0089] S5: Calculation of the comprehensive carbon fixation efficiency of shellfish and algae carbon sinks in Liaoning Province. The carbon fixation efficiency weight coefficients of shellfish and algae varieties, unit production capacity and personnel input are 1 / 3, 1 / 3, and 1 / 3 respectively. The comprehensive carbon fixation efficiency index is I=1 / 3×8+1 / 3×5+1 / 3×8=7. The carbon fixation efficiency of shellfish varieties is high, the carbon fixation efficiency per unit production capacity is medium, and the carbon fixation efficiency of personnel input is high.

[0090] The calculation steps for evaluating the carbon sequestration efficiency of shellfish in Fujian Province are as follows:

[0091] S1: The main farmed shellfish species in Fujian Province are oysters, mussels, scallops, clams, cockles and razor clams, which are high carbon fixation species. The carbon fixation efficiency contribution factor of shellfish species, the carbon fixation efficiency factor I1, is 8.

[0092] S2: The total annual carbon fixation of shellfish in Fujian Province is calculated based on the shellfish production, dry-wet ratio, mass ratio and carbon content in Tables 2 and 3. The shellfish carbon fixation C1 is 282.345 million tons.

[0093] S3: The carbon fixation amount D1 corresponding to the unit production of shellfish in Fujian Province is calculated based on the total carbon fixation amount and total production, and D1 is 0.091.

[0094] The carbon fixation amount D2 corresponding to a unit area of ​​shellfish in Fujian Province is calculated based on the total carbon fixation amount and total area, and D2 is 3.85.

[0095] The carbon sequestration efficiency contribution factors per unit production capacity in Fujian Province are divided into three categories: high carbon sequestration per unit production capacity, medium carbon sequestration per unit production capacity, and low carbon sequestration per unit production capacity according to the output and area corresponding to the unit carbon sink, and the contribution factor values ​​are 8, 5, and 3 respectively. This example is high carbon sequestration per unit production capacity, and the carbon sequestration efficiency factor I2 is 8.

[0096] S4: The carbon fixation amount E1 corresponding to the seedling input in Fujian Province is calculated based on the total carbon fixation amount and the number of seedlings, and E1 is 0.0007.

[0097] The carbon sequestration amount E2 corresponding to the personnel input in Fujian Province is calculated based on the total carbon sequestration amount and the number of personnel, and E2 is 1.24.

[0098] The contribution factors of carbon sequestration efficiency per unit input in Fujian Province are divided into three categories: low-input carbon sequestration, medium-input carbon sequestration, and high-input carbon sequestration according to the carbon sequestration amount per unit seedling and per unit personnel, and the contribution factor values ​​are 8, 5, and 3 respectively. This example is medium-input carbon sequestration, and the carbon sequestration efficiency factor I3 is 5.

[0099] S5: Calculation of the comprehensive carbon fixation efficiency of shellfish and algae carbon sinks in Fujian Province. The carbon fixation efficiency weight coefficients of shellfish and algae varieties, unit production capacity and personnel input are 1 / 3, 1 / 3, and 1 / 3 respectively. The comprehensive carbon fixation efficiency index is I = 1 / 3×8+1 / 3×8+1 / 3×5=7. The carbon fixation efficiency of shellfish varieties is high, the carbon fixation efficiency per unit production capacity is high, and the carbon fixation efficiency of personnel input is medium.

[0100] The advantages and positive effects of the present invention are:

[0101] The present invention analyzes the carbon sink and carbon fixation efficiency of shellfish and algae in different regions by combining multiple factors, and provides support for the carbon sink benefit assessment of shellfish and algae fisheries in different regions. The carbon sink and carbon fixation efficiency of shellfish and algae in different regions is comprehensively assessed based on the carbon fixation capacity of typical cultured shellfish and algae varieties in different regions, the culture output and area, seedlings and personnel input factors; the calculation method for carbon sink benefit assessment of shellfish and algae fisheries in different regions is simple and easy to implement; the data used for the carbon sink and carbon fixation efficiency assessment of shellfish and algae in different regions are all public data and updated every year, which is conducive to ensuring the continuous assessment of the carbon sink efficiency of shellfish and algae.

[0102] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for evaluating carbon sink efficiency of shellfish and algae in different regions, characterized by: The following steps are included: S1: Calculate the carbon fixation efficiency contribution factor of shellfish and algae species based on the average individual carbon fixation amount and average growth period of typical cultured shellfish and algae species in the region; S2: Calculate the total carbon fixation based on the annual production and dry-wet ratio, mass ratio, and carbon content parameters of different shellfish algae species; S3: Based on the shellfish and algae aquaculture output, aquaculture area, and total carbon fixation, the carbon fixation amount corresponding to unit output and unit area is obtained, and the carbon fixation efficiency contribution factor per unit production capacity is calculated; S4: Based on the total carbon sequestration amount, the number of seedlings, and the number of employees, calculate the carbon sequestration efficiency contribution factor of the relevant inputs; S5: Based on the carbon sequestration efficiency contribution factors and weight coefficients of the shellfish and algae species, unit production capacity and personnel input in the region, calculate the comprehensive carbon sequestration efficiency of the shellfish and algae carbon sink in the region.

2. The method for evaluating carbon sink efficiency of shellfish and algae in different regions according to claim 1, characterized in that: In S1, the calculation formula of the carbon fixation efficiency contribution factor of the shellfish algae species is as follows: Among them, B0 is the average carbon fixation amount of individual shellfish and algae, T is the average growth period, and the species are divided into three categories: high carbon fixation species, medium carbon fixation species, and low carbon fixation species according to the calculation results, and the carbon fixation efficiency factor I1 is determined.

3. A method for evaluating carbon sink efficiency of shellfish and algae in different regions according to claim 1 or 2, characterized in that: In S2, the annual total carbon fixation of the shellfish algae is calculated as follows: C=∑C 1i +∑C 2j Among them, i represents different shellfish species in the region, and j represents different algae species in the region; C1=P1×W1×M1×F1+(1-M1)×F′1 Among them, C1 is the annual carbon fixation of shellfish, P1 is the annual wet weight of shellfish production, W1 is the dry-wet ratio of shellfish, M1 is the shell mass ratio of shellfish, F1 is the carbon content of shellfish shells, and F'1 is the carbon content of shellfish soft tissues; C2=P2×W2×F2 Among them, C2 is the annual carbon fixation of algae, P2 is the annual wet weight of algae production, W2 is the dry-wet ratio of algae, and F2 is the carbon content of algae.

4. A method for evaluating carbon sink efficiency of shellfish and algae in different regions according to claim 1 or 2, characterized in that: In S3, the carbon fixation amount corresponding to the unit output is calculated as follows: Among them, D1 is the carbon fixation corresponding to unit output, P1 is the annual output of shellfish, P2 is the annual output of algae, C is the total carbon fixation of shellfish and algae, i is the different shellfish species in the region, and j is the different algae species in the region.

5. A method for evaluating carbon sink efficiency of shellfish and algae in different regions according to claim 1 or 2, characterized in that: In S3, the carbon fixation amount per unit area is calculated as follows: Among them, D2 is the carbon fixation per unit area, S1 is the annual production of shellfish, S2 is the annual production of algae, C is the total carbon fixation of shellfish and algae, i is the different shellfish species in the area, and j is the different algae species in the area.

6. A method for evaluating carbon sink efficiency of shellfish and algae in different regions according to claim 1 or 2, characterized in that: In S3, the carbon sequestration efficiency contribution factor per unit capacity is divided into three categories: high carbon sequestration per unit capacity, medium carbon sequestration per unit capacity, and low carbon sequestration per unit capacity according to the output and area corresponding to the unit carbon sink amount, and the carbon sequestration efficiency factor I2 is determined.

7. A method for evaluating carbon sink efficiency of shellfish and algae in different regions according to claim 1 or 2, characterized in that: In S4, the carbon fixation amount corresponding to the seedling input is calculated as follows: Among them, E1 is the carbon fixation corresponding to unit seedlings, Z1 is the number of shellfish seedlings, Z2 is the number of algae seedlings, C is the total carbon fixation of shellfish and algae, i is the different shellfish species in the area, and j is the different algae species in the area.

8. A method for evaluating carbon sink efficiency of shellfish and algae in different regions according to claim 1 or 2, characterized in that: In S4, the personnel input the corresponding carbon fixation amount, and the calculation formula is as follows: Among them, E1 is the carbon fixation per unit person, R is the number of people engaged in aquaculture, and C is the total carbon fixation of shellfish and algae.

9. A method for evaluating carbon sink efficiency of shellfish and algae in different regions according to claim 1 or 2, characterized in that: In S4, the carbon fixation efficiency contribution factor per unit input is divided into three categories: high-input carbon fixation, medium-input carbon fixation, and low-input carbon fixation according to the carbon fixation amount per unit seedling and per unit personnel, and the carbon fixation efficiency factor I3 is determined.

10. A method for evaluating carbon sink efficiency of shellfish and algae in different regions according to claim 1 or 2, characterized in that: The comprehensive carbon fixation efficiency of the algae carbon sink in this area is calculated as follows: I=∑ω i I i Where I is the comprehensive carbon fixation efficiency index, ω i is the carbon fixation efficiency weight coefficient, I i The carbon fixation efficiency factor is determined by the expert experience method, and the carbon fixation efficiency weight coefficients ω1, ω2, and ω3 of the shellfish and algae species, unit production capacity, and personnel input are determined.

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