A method for predicting carbon sink of mangrove reforestation in a culture pond

Abstract

The application discloses a kind of breeding pond mangrove reforestation carbon sink prediction method, it is related to carbon sink evaluation technical field, for solving the problem that prior art cannot accurately predict relevant carbon sink.The method respectively measures mangrove and coastal aquaculture pond carbon dioxide and methane emission and conversion calculation, obtains carbon emission reduction amount;Determination mangrove plant carbon sink and soil carbon burial rate, obtain carbon sink increment;Measure different soil organic carbon storage, calculate the change in reserves.Finally, these three aspects of data, with mangrove seedling recovery 20 years forest conversion, calculate the aquaculture pond mangrove reforestation carbon sink.This method comprehensively considers the carbon emission and soil carbon sink difference ignored by prior art, by innovative calculation method, to accurately evaluate the aquaculture pond mangrove reforestation carbon sink provides an effective way.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon sink evaluation, and particularly relates to a method for predicting carbon sink of mangrove reforestation in aquaculture pond. BACKGROUND

[0002] Mangrove is an important component of coastal wetlands, with the ability to efficiently absorb carbon dioxide from the atmosphere and store carbon in the soil for a long time. This makes it play an important role in global ecological systems in response to climate change, and it is therefore included in the Intergovernmental Panel on Climate Change (IPCC) 2013 Wetlands Greenhouse Gas Supplement and in the United Nations' self-determined contribution of ecosystems to carbon sink, highlighting its importance in global ecology and climate regulation.

[0003] In the 20th century, a large number of mangroves in China's coastal areas were reclamationed into aquaculture ponds, which became one of the important reasons for the degradation of mangroves in China. The government of China realized the role of mangroves in responding to climate change, maintaining biodiversity, and protecting the coast, and began to vigorously promote mangrove restoration. One of the main measures for mangrove restoration is the reforestation of mangroves in aquaculture ponds, because the carbon sink generated by the reforestation of mangroves in aquaculture ponds is of great significance to the increase of carbon sink in coastal wetlands, and helps to improve the ecological function and ability to respond to climate change of coastal wetlands.

[0004] There are differences in carbon emissions between aquaculture ponds and mangroves, and after mangroves are reclamationed into aquaculture ponds, the feed added to the aquaculture ponds will have an impact on the organic carbon content at the bottom of the pond. However, the existing methods for predicting carbon sink of mangrove reforestation in aquaculture ponds have defects. For example, only the part of carbon sequestration and sink increase of mangrove plants after the aquaculture ponds are restored into mangroves is considered; Dey et al. in 2024 predicted the vegetation and soil carbon storage in mangrove restoration areas, but did not conduct comparative analysis of the vegetation and soil carbon sink brought by the reforestation of mangroves in aquaculture ponds, and also ignored the differences in carbon emissions between aquaculture ponds and mangroves, as well as the differences in soil carbon sink between the bottom of the aquaculture ponds and mangroves. These deficiencies make the existing methods unable to comprehensively and accurately predict the carbon sink of mangrove reforestation in aquaculture ponds, and it is difficult to meet the demand for accurate evaluation of carbon sink of mangrove ecosystems. SUMMARY

[0005] In view of the deficiencies in the prior art, the present application provides a method for predicting carbon sink of mangrove reforestation in aquaculture ponds. This method calculates the differences in soil carbon sink between the bottom of the aquaculture ponds and mangroves, the contribution of plant carbon sequestration and soil carbon sink after the reforestation of mangroves, and the differences in carbon emissions between aquaculture ponds and mangroves, and other factors, to comprehensively obtain the carbon sink contribution of mangrove reforestation in aquaculture ponds. This method fills the gaps in the prior art and provides a more comprehensive and scientific prediction approach.

[0006] To achieve the above object, the present application provides the following technical solutions.

[0007] A prediction method of mangrove reforestation carbon sink of a breeding pond, comprising the steps of:

[0008] Obtaining carbon dioxide and methane emission amounts of the mangrove and the coastal breeding pond, converting the carbon dioxide and methane emission amounts into carbon emission amounts of the mangrove and the coastal breeding pond respectively, and subtracting the carbon emission amounts respectively to obtain a carbon emission reduction amount after the coastal breeding pond is restored to the mangrove;

[0009] Obtaining a mangrove plant carbon sink and a soil carbon burial rate, and obtaining a carbon sink increase amount after the coastal breeding pond is restored to the mangrove according to a sum of the mangrove plant carbon sink and the soil carbon burial rate;

[0010] Obtaining organic carbon reserves of bottom soil of the coastal breeding pond and soil of the same depth of the mangrove after the mangrove is reforested into the coastal breeding pond, and obtaining a change of the organic carbon reserves of the bottom soil caused by the reforestation of the mangrove into the coastal breeding pond according to a difference between the organic carbon reserves of the bottom soil and the soil of the same depth of the mangrove;

[0011] According to the carbon emission reduction amount after the coastal breeding pond is restored to the mangrove, the carbon sink increase amount after the coastal breeding pond is restored to the mangrove, and the change of the organic carbon reserves of the bottom soil caused by the reforestation of the mangrove into the coastal breeding pond, a mangrove reforestation carbon sink of the breeding pond is calculated.

[0012] The prediction method of the mangrove reforestation carbon sink of the breeding pond as described above, further,

[0013] The carbon dioxide and methane emission amounts are converted into carbon emission amounts of the mangrove and the coastal breeding pond respectively, and specifically:

[0014]

[0015] The carbon emission amounts are subtracted to obtain the carbon emission reduction amount after the coastal breeding pond is restored to the mangrove, and specifically:

[0016] E C = E CA -E CM ;

[0017] In the formula, E CM and E CA are carbon emission amounts of the mangrove and the breeding pond respectively, and are carbon dioxide emission amounts of the mangrove and the breeding pond respectively, and are methane emission amounts of the mangrove and the breeding pond respectively, and E C is the carbon emission reduction amount after the coastal breeding pond is restored to the mangrove.

[0018] The method for predicting the carbon sink of the mangrove reforestation in the aquaculture pond as described above is further,

[0019] The carbon sink of the mangrove plant C P including the carbon sink of the litter C L and the carbon sink of the tree growth C G wherein,

[0020] The carbon sink of the litter C L is:

[0021]

[0022] The carbon sink of the tree growth C G is:

[0023]

[0024] The carbon sink of the litter C L and the carbon sink of the tree growth C G are added, i.e. C P =C L +C G , to obtain the carbon sink of the mangrove plant C P ;

[0025] The soil carbon burial rate C S is specifically:

[0026] C S =BD×C t %×SR;

[0027] The sum of the carbon sink of the mangrove plant and the soil carbon burial rate obtains the increment of the carbon sink C M after the coastal aquaculture pond is restored to the mangrove, which is specifically:

[0028] C M =C P +C S ;

[0029] In the formula, B i is the biomass of the litter collected in the i th month, C Bi % is the carbon content of the litter collected in the i th month, A w is the area of the litter collection net, f(D, H) is the allometric equation for calculating the tree biomass, D i1 and D i2 are the diameters of the i th tree in the sample plot measured at the beginning and end of the year, respectively, H i1 and H i2 are the heights of the i th tree in the sample plot measured at the beginning and end of the year, respectively, C i1 % and C i2% represents the carbon content of the i-th tree in the quadrat at the beginning and end of the year, respectively, where n is the number of trees in the quadrat, and A is the carbon content of the i-th tree in the quadrat. p BD is the area of ​​the quadrat, C is the bulk density of the soil column sample, and D is the area of ​​the quadrat. t % represents the carbon content of a soil column sample, and SR represents the soil deposition rate; C P It is a plant carbon sink, C L It is a carbon sink from litter, C G It is the carbon sink of tree growth, C S It is the rate of soil carbon burial, C M This represents the increase in carbon sequestration after aquaculture ponds are restored to mangroves.

[0030] The method for predicting carbon sequestration in mangrove reforestation projects using aquaculture ponds, as described above, can be further...

[0031] Based on the difference in organic carbon storage between the bottom soil and mangrove soil at the same depth, the change in bottom soil organic carbon storage caused by the reclamation of mangroves into coastal aquaculture ponds is obtained, specifically as follows:

[0032] SOC C =SOC M -SOC A ;

[0033] In the formula, SOC C The change in soil organic carbon (SOC) at the bottom of the mangrove forest caused by its reclamation into aquaculture ponds. A It refers to the organic carbon storage (SOC) in the bottom soil after reclamation into coastal aquaculture ponds. M It is the soil organic carbon storage of mangroves at the same depth.

[0034] The method for predicting carbon sequestration in mangrove reforestation projects using aquaculture ponds, as described above, can be further...

[0035] Based on the reduction in carbon emissions after coastal aquaculture ponds were restored to mangroves, the increase in carbon sequestration after restoration, and the change in bottom soil organic carbon storage caused by the reclamation of mangroves into coastal aquaculture ponds, the carbon sequestration of mangrove reforestation in aquaculture ponds was calculated as follows:

[0036] C T =20×(E C +C M )+SOC C ;

[0037] In the formula, C T The carbon sink of mangrove reforestation in aquaculture ponds is calculated based on the total carbon emissions from the conversion of mangrove seedlings into mature forests over 20 years and the total carbon sink of mangroves.

[0038] Compared with the prior art, the advantages of this invention are as follows:

[0039] (1) The prior art has obvious limitations in predicting the mangrove reforestation carbon sink of aquaculture ponds. It does not take into account the reduced carbon emissions during the process of restoring aquaculture ponds to mangroves. The carbon emission levels of aquaculture ponds and mangrove ecosystems are different, and after the conversion of aquaculture ponds to mangroves, carbon emissions will decrease accordingly. This part of the reduction is crucial for accurate carbon sink assessment. At the same time, the existing technology also does not pay attention to the difference in carbon sink between the bottom of the aquaculture pond and the mangrove soil. Due to the differences in soil properties and organic carbon content between aquaculture ponds and mangroves, their carbon sink capacity is also different, and the existing technology does not include this difference in carbon sink prediction. The prediction method proposed in this application measures the carbon dioxide and methane emissions of mangroves and coastal aquaculture ponds respectively, and calculates the carbon emission difference after conversion, i.e. the reduction of carbon emissions after the conversion of aquaculture ponds to mangroves. At the same time, the carbon sink of mangrove plants, the soil carbon burial rate and the organic carbon storage of different soils are measured and the difference is calculated, taking into account various factors to make the prediction result more accurate.

[0040] (2) Traditional prediction methods often only focus on one or a few aspects, such as only considering the carbon sequestration and sink of mangrove plants after the conversion of aquaculture ponds to mangroves. This single consideration method cannot fully reflect the true situation of carbon sink. The prediction method proposed in this application points out that the carbon sink of mangrove reforestation in aquaculture ponds is composed of three parts: carbon emission reduction, reforestation carbon sink increase and soil carbon sink increase. Carbon emission reduction reflects the positive impact of carbon emission changes during the conversion of the ecosystem on carbon sink; reforestation carbon sink increase covers the carbon fixed by litter and growth of mangrove plants during their growth; soil carbon sink increase considers the contribution of mangrove soil to carbon storage. This multi-dimensional carbon sink composition framework comprehensively and systematically presents the carbon sink situation of mangrove reforestation in aquaculture ponds, providing a new and more scientific method for carbon sink prediction. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0042] Figure 1 The flowchart of the prediction method of the mangrove reforestation carbon sink of aquaculture ponds in the embodiments of the present application. DETAILED DESCRIPTION

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0044] Example:

[0045] It should be noted that the terms "comprising" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or devices.

[0046] Figure 1 This is a schematic flowchart illustrating the carbon sequestration prediction method for mangrove reforestation in aquaculture ponds according to an embodiment of the present invention. Figure 1 As shown in the embodiment of the present invention, a method for predicting carbon sequestration in mangrove reforestation in aquaculture ponds may specifically include the following steps:

[0047] Step 1: Obtain the carbon dioxide and methane emissions from mangrove forests and coastal aquaculture ponds, convert the carbon dioxide and methane emissions into individual carbon emissions from mangrove forests and coastal aquaculture ponds, and subtract the individual carbon emissions to obtain the reduction in carbon emissions after the coastal aquaculture ponds are restored to mangrove forests.

[0048] In this step, carbon dioxide and methane emissions were measured separately for mangrove forests and coastal aquaculture ponds. This is because mangrove forests and coastal aquaculture ponds differ in their ecosystem functions, resulting in different amounts of carbon dioxide and methane emissions into the atmosphere.

[0049] Then, since both carbon dioxide and methane are greenhouse gases, to ensure a consistent measurement of carbon emissions, the measured carbon dioxide and methane emissions need to be converted into carbon emission values. This conversion is based on the ratio of the molecular weight of carbon dioxide and methane to the number of carbon atoms, calculated using the following formula. For example, for mangroves, their carbon emission E... CM The calculation formula is: in, It refers to the carbon dioxide emissions from mangroves. It's the methane emissions from mangroves. and These are the conversion factors for converting carbon dioxide and methane into carbon emissions (derived from the ratio of the molecular weight of carbon dioxide and methane to the number of carbon atoms); similarly, the carbon emissions E from coastal aquaculture ponds can be obtained.CA The calculation formula Such conversion can compare the carbon emissions of mangrove and coastal aquaculture pond under the same carbon measurement standard.

[0050] Then, after obtaining the carbon emissions of mangrove and coastal aquaculture pond respectively, subtract the two, i.e. E C = E CA -E CM , the difference E C is the reduction of carbon emissions after the coastal aquaculture pond is restored to mangrove. This reduction reflects the effect of restoring the aquaculture pond to mangrove in reducing carbon emissions. If the reduction is positive, it means that carbon emissions have indeed decreased after the aquaculture pond is restored to mangrove, which provides a quantitative basis for assessing the role of mangrove reforestation in addressing climate change and reducing greenhouse gas emissions.

[0051] Step 2: Obtain the carbon sink of mangrove plants and soil carbon sequestration rate, and obtain the increase of carbon sink after the coastal aquaculture pond is restored to mangrove according to the sum of the carbon sink of mangrove plants and soil carbon sequestration rate.

[0052] In this step, the carbon sink of mangrove plants consists of two parts: litter carbon sink and carbon sink of tree growth. The litter carbon sink is derived from the litter of mangrove, such as leaves, fruits and flowers. When measuring, these litters are collected through the litter net every month within a year, and the total dry weight and carbon content are measured, and the carbon sink is calculated by the formula , where B i is the biomass of the litter collected in the i th month, C Bi % is the carbon content of the litter collected in the i th month, and A w is the area of the litter collection net.

[0053] Then, the carbon sink of tree growth is related to the growth of the tree, which is predicted by measuring the diameter at breast height and height of the tree within a year, and combining the carbon content of the tree to obtain

[0054] The calculation formula of the carbon sink of tree growth is , where f(D, H) is the allometric equation for calculating the biomass of the tree, D i1 and D i2 are the diameter at breast height of the i th tree in the sample at the beginning and end of the year, H i1 and H i2 are the height of the i th tree in the sample at the beginning and end of the year, C i1 % and C i2 % are the carbon content of the i th tree in the sample at the beginning and end of the year, and n is the number of trees in the sample.p is the area of the sample plot.

[0055] Then, the carbon sink C L of the litterfall is added to the carbon sink C G of the tree growth, i.e., C P = C L + C G , to obtain the carbon sink C P of the mangrove plants.

[0056] The soil carbon burial rate reflects the ability of the soil to store carbon. When measuring, by obtaining a soil column sample, the bulk density BD, the carbon content C t %, and the sedimentation rate SR of the soil are analyzed, and the soil carbon burial rate C S is calculated using the formula C t = BD x C S %.

[0057] Then, the carbon sink C P of the mangrove plants is added to the soil carbon burial rate C S , i.e., C M = C P + C S ; the resulting C M is the increase in carbon sink after the aquaculture pond is restored to mangrove. This carbon sink increase data is of great significance for evaluating the positive contribution of mangrove reforestation in aquaculture ponds to carbon sink, and is an index for measuring the degree of enhancement of carbon sink function of the mangrove ecosystem, which can provide strong data support for the benefit evaluation of related ecological projects and the research of carbon cycle in the ecological system.

[0058] Step 3: Obtain the organic carbon storage of the bottom soil of the coastal aquaculture pond after the mangrove reclamation and the organic carbon storage of the mangrove soil at the same depth, and obtain the change in the organic carbon storage of the bottom soil caused by the reclamation of the mangrove into the coastal aquaculture pond according to the difference between the organic carbon storage of the bottom soil and the organic carbon storage of the mangrove soil at the same depth;

[0059] In this step, for the bottom soil after the reclamation of the mangrove into the coastal aquaculture pond, a column sample is taken at the bottom of the aquaculture pond. The obtained column sample is layered, and then the organic carbon content and the bulk density of each layer of soil are measured, and combined with the thickness of each layer, the organic carbon storage SOC A of the bottom soil of the coastal aquaculture pond is obtained through corresponding calculation. This layered measurement and calculation method can more accurately reflect the actual storage of organic carbon in the bottom soil of the aquaculture pond, because the organic carbon content and properties of soil at different depths may be different.

[0060] Then, for the mangrove soil of the same depth, the measurement method similar to that of the soil at the bottom of the culture pond is adopted, i.e., taking a columnar sample, dividing layers, measuring the organic carbon content and bulk density, and then calculating the organic carbon storage SOC of the mangrove soil of the same depth by combining the thickness M . By measuring the two kinds of soil of the same depth, the scientificity and accuracy of subsequent comparison are ensured, and the interference factors of the change of the organic carbon storage caused by the difference in soil depth can be effectively excluded.

[0061] Then, the organic carbon storage SOC M of the mangrove soil of the same depth is subtracted from the organic carbon storage SOC A of the soil at the bottom of the coastal culture pond after reclamation, i.e., SOC C = SOC M -SOC A ; the difference SOC C is the change of the organic carbon storage of the bottom soil caused by the reclamation of the mangrove into the culture pond. The change value reflects the increase and decrease of the soil organic carbon storage during the reclamation process. If SOC C is positive, it means that the organic carbon storage of the bottom soil decreases after the reclamation of the mangrove into the culture pond; if it is negative, it means that the organic carbon storage increases. The data is very important for accurately evaluating the change trend of the soil carbon sink in the process of the reforestation of the culture pond into the mangrove, is one of the important parameters for calculating the carbon sink of the reforestation of the culture pond into the mangrove, and can provide a basis for in-depth research on the carbon cycle and carbon sink function of the mangrove ecosystem.

[0062] Step 4: The carbon sink of the reforestation of the culture pond into the mangrove is calculated according to the decrease of the carbon emission after the coastal culture pond is restored into the mangrove, the increase of the carbon sink after the coastal culture pond is restored into the mangrove, and the change of the organic carbon storage of the bottom soil caused by the reclamation of the mangrove into the coastal culture pond.

[0063] The decrease of the carbon emission after the coastal culture pond is restored into the mangrove, the increase of the carbon sink after the coastal culture pond is restored into the mangrove (the decrease of the emission and the increase of the carbon sink are converted into the total carbon emission and the total carbon sink of the mangrove after the mangrove seedlings are restored for 20 years to form a forest), and the change of the organic carbon storage of the bottom soil caused by the reclamation of the mangrove into the coastal culture pond are comprehensively calculated, and the calculation formula is C T = 20 x (E C +C M )+ SOC C ; in the formula, C T is the carbon sink of the reforestation of the culture pond into the mangrove.

[0064] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0065] The above embodiments are only for the purpose of illustrating the technical concepts and characteristics of the present application, and the purpose is to enable those of ordinary skill in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the essence of the present application should be covered within the protection scope of the present application.

Claims

1. A method for predicting a mangrove reforestation carbon sink of a cultivation pond, characterized by, Including the following steps: Obtain the carbon dioxide and methane emissions from mangrove forests and coastal aquaculture ponds, convert the carbon dioxide and methane emissions into individual carbon emissions from mangrove forests and coastal aquaculture ponds, and subtract the individual carbon emissions to obtain the reduction in carbon emissions after the aquaculture ponds are restored to mangrove forests. Obtain the carbon sequestration rate of mangrove plants and the carbon burial rate of soil. Based on the sum of the carbon sequestration rates of mangrove plants and soil, obtain the increase in carbon sequestration after coastal aquaculture ponds are restored to mangroves. The organic carbon storage of the bottom soil after mangroves are reclaimed into coastal aquaculture ponds and the mangrove soil at the same depth is obtained. Based on the difference in organic carbon storage between the bottom soil and the mangrove soil at the same depth, the change in organic carbon storage of the bottom soil caused by the reclamation of mangroves into coastal aquaculture ponds is obtained. The carbon sink of mangrove reforestation in aquaculture ponds was calculated based on the reduction of carbon emissions after the coastal aquaculture ponds were restored to mangroves, the increase of carbon sink after the coastal aquaculture ponds were restored to mangroves, and the change in bottom soil organic carbon storage caused by the reclamation of mangroves into coastal aquaculture ponds.

2. The method for predicting carbon sequestration in mangrove reforestation in aquaculture ponds according to claim 1, characterized in that, The carbon dioxide and methane emissions are converted into carbon emissions from mangroves and coastal aquaculture ponds, respectively: ; ; Subtracting the respective carbon emissions from each yields the carbon emission reduction after restoring the aquaculture ponds to mangroves, specifically: - ； wherein, and are carbon emissions from mangrove forests and aquaculture ponds, respectively, and are carbon dioxide emissions from mangrove forests and aquaculture ponds, respectively, and are methane emissions from mangrove forests and aquaculture ponds, respectively, is the reduction in carbon emissions after the aquaculture ponds are restored to mangrove forests.

3. The method for predicting carbon sequestration in mangrove reforestation in aquaculture ponds according to claim 2, characterized in that, Mangrove plant carbon sinks Including litter carbon sequestration Carbon sinks from tree growth ,in, Litter carbon sequestration for: ; Carbon sinks from tree growth for: ; Carbon sequestration of litter Carbon sinks from tree growth Adding, that is Obtain carbon sequestration from mangrove plants ; Soil carbon sequestration rate Specifically: = % ； The sum of the carbon sequestration rates of mangrove plants and soil carbon can be used to obtain the increase in carbon sequestration after coastal aquaculture ponds are restored to mangroves. Specifically: ； In the formula It is the biomass of litter collected in the i-th month. % represents the carbon content of litter collected in the i-th month. It is the area of ​​the net for collecting litter. () is the allometric growth equation for calculating tree biomass. and These are the measurements of the diameter at breast height (DBH) of the i-th tree within the quadrat at the beginning and end of the year, respectively. and These are the measurements of the height of the i-th tree within the quadrat at the beginning and end of the year, respectively. %and % represents the carbon content of the i-th tree in the quadrat at the beginning and end of the year, respectively, and n is the number of trees in the quadrat. It is the area of ​​the quadrat. It is the bulk density of a soil column sample. The percentage represents the carbon content of a soil column sample. It is the soil deposition rate; It is a plant carbon sink. It is a carbon sink from litter. It is a carbon sink for tree growth. It is the rate of soil carbon burial. This represents the increase in carbon sequestration after aquaculture ponds are restored to mangroves.

4. The method for predicting carbon sequestration in mangrove reforestation in aquaculture ponds according to claim 3, characterized in that, Based on the difference in organic carbon storage between the bottom soil and mangrove soil at the same depth, the change in bottom soil organic carbon storage caused by the reclamation of mangroves into coastal aquaculture ponds is obtained, specifically as follows: ; In the formula The change in the organic carbon storage in the bottom soil is caused by the reclamation of mangrove forests into aquaculture ponds. It refers to the organic carbon storage in the bottom soil after the land has been reclaimed into coastal aquaculture ponds. It is the soil organic carbon storage of mangroves at the same depth.

5. The method for predicting carbon sequestration in mangrove reforestation in aquaculture ponds according to claim 4, characterized in that, Based on the reduction in carbon emissions after coastal aquaculture ponds were restored to mangroves, the increase in carbon sequestration after restoration, and the change in bottom soil organic carbon storage caused by the reclamation of mangroves into coastal aquaculture ponds, the carbon sequestration of mangrove reforestation in aquaculture ponds was calculated as follows: )+ ; In the formula The carbon sink of mangrove reforestation in aquaculture ponds is calculated based on the total carbon emissions from the conversion of mangrove seedlings into mature forests over 20 years and the total carbon sink of mangroves. This is the reduction in carbon emissions after the aquaculture ponds were restored to mangroves; This represents the increase in carbon sequestration after aquaculture ponds are restored to mangroves; The change in the organic carbon storage in the bottom soil is caused by the reclamation of mangrove forests into aquaculture ponds.

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