10 August 2024, Volume 46 Issue 4

    

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• Research Papers
• Study on the calibration of wave field simulation in the China adjacent sea based on SWAN model

  LIN Yifan, LIU Yufei, WANG Xiaohe, LU Peng, YANG Zihao, DONG Sheng

  2024, 46(4): 1-10. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.001

  Abstract ( ) PDF ( )

  Based on the observations originated from satellites and archived in IFREMER, the sensitivity analysis and adaptive modification were conducted on the wind input source term, dissipation caused by white-capping and bottom friction and their parameters of SWAN model with unstructured mesh grid in the China adjacent sea. The applicability of the modified model was validated by performing 25 years numerical simulation. Results indicated that the reanalysis wind speed data from NCEP were consistent with observations in China sea and could be used as the wind forcing for wave simulation. The Komen pattern with the coefficient of 1.86×10^-5 for both the wind input source term and the dissipation caused by white-capping was considered as the optimal parameter combination for this sea area. As for calculating the dissipation due to the bottom friction, COLLINS model with default parameter was the most suitable. And the calibrated SWAN model was stable and could simulate the significant wave height more accurately in the China adjacent sea.
• Study on the synoptic characteristics and precipitation prediction of strong convection in Shandong peninsula

  MEI Chanjuan, CHU Zihe, ZHANG Can, SU Yi, WAN Fujing

  2024, 46(4): 11-21. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.002

  Abstract ( ) PDF ( )

  The temporal and spatial distribution characteristics, physical parameters, and fallout forecasts of strong convection under different weather typologies in Shandong peninsula from 2015 to 2020 were analyzed and studied. The results showed that: strong convective weather mainly occurred under five weather situations, namely, low trough, high-altitude cold vortex, northwesterly flow, edge of the sub-tropical height and transverse trough; strong convective weather events mainly concentrated in June-August, and were most likely to occur in the afternoon to the nighttime, and were mostly unevenly distributed; the spatial distribution mainly exhibited four characteristics, namely, western-type, eastern-type, area-wide-type, and local-type, with local-type events being the most frequent. The physical parameter characteristics differed greatly among different weather situation configurations, and the physical parameter characteristics varied greatly among different weather situations. The physical parameters of different weather configurations varied greatly, with the CAPE value and K index of the sub-tropical height edge type being larger than those of other situations, the vertical wind shear SHR6 and the total index TT of the high-altitude cold vortex type being the largest, the CAPE value and K index of the northwesterly flow type being small, and the SI value being positive. Strong convection caused by weak cold fronts and sea-breeze fronts was most likely to occur in the western part of Yantai, and then moved eastward to become weaker, and the eastern type was more likely to happen at night. The eastern type mostly occurred at night, mostly due to the influence of the surface convergence line, and the different positions of the inversion trough also determined the different fallout areas of the strong convection. The region-wide type mainly occurred under the influence of the upper-air cold vortex or the strong trough cold front; the local type corresponded to the edge of the subduction plateau and the northwesterly airflow type, with the surface convergence line as the main triggering system, which had a very good correlation with the sea-land topography and the mountainous topography.
• Effect of water temperature on physical clogging ofcoastal heterogeneous layer during artificial recharge

  LIN Guoqing, ZHAO Di, HUANG Zhuoxiong, MO Weiming

  2024, 46(4): 22-29. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.003

  Abstract ( ) PDF ( )

  Artificial recharge is easy to cause clogging in coastal strata. The temperature of recharge water and the heterogeneity of porous media are important influencing factors for physical clogging. In this paper, by changing the particle gradation of porous media to simulate heterogeneous layers with different permeability, constant head seepage experiments were carried out to explore the spatio-temporal evolution law of permeability coefficient of heterogeneous porous media under the condition of 10～25 ℃ recharge, and to quantitatively analyze the sedimentary distribution characteristics of suspended particles in porous media, and to reveal the influence of water temperature and aquifer heterogeneity on the physical blockage of coastal strata. The results showed that the effect of water temperature on the clogging process of particles in porous media was limited by the heterogeneity of the media, and there existed a critical value of coefficient of uniformity. When the coefficient of uniformity was below the critical value, the clogging rate increaseed with the increase of the temperature of recharge water. When the coefficient of uniformity was higher than the critical value, the water temperature had little effect on the physical clogging of porous media. Under constant temperature of recharge water, the larger the coefficient of uniformity of porous media was, the more serious of the surface clogging. The results can provide scientific basis for preventing physical clogging of coastal aquifer.
• Dynamic variation and hydrochemical characteristics of groundwater depth in Nansi lake west plain

  SONG Yang, SHI Xinzhi, WANG Jin

  2024, 46(4): 30-36. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.004

  Abstract ( ) PDF ( )

  Nansi lake west plain (Tengxi plain), located in the northwest of Zaozhuang city, Shandong province, is one of the "eight water sources" of Zaozhuang city. In this paper, the monitoring data of 41 groundwater monitoring wells in Tengxi plain from 2011 to 2020 were sorted and calculated, and the dynamic variation trend of groundwater depth and hydrochemical characteristics of Tengxi plain were analyzed. The results showed that the variation of groundwater depth in Tengxi plain was small in the year, generally ranging from 1 to 5 m. The annual variation of groundwater depth showed seasonal fluctuation. The groundwater depth began to increase from March to April in normal and dry years, which was mainly affected by agricultural irrigation. The groundwater depth was smaller in August and September in wet, normal and dry years, which was related to precipitation recharge. Combined with the dynamic method of water level, the groundwater level in Tenxi plain showed a rising trend in the past ten years, with an average rising rate of 0.41 m/a, and the area with the largest rise of groundwater level was in the southwest of Tenxi plain. According to the analysis of Piper diagrams and Gibbs diagram, the groundwater type in Tengxi plain was HCO^-₃·SO^2-₄-Ca²⁺, which was mainly affected by rock weathering. In order to provide some basis for groundwater management in Tengxi plain, this paper responds to the gradual attention of the state to groundwater in recent years.
• Analysis of the law and mechanism of the erosion and deposition of the Lvsi area in recent 30 years

  WU Chuangshou, TIAN peng, GU Weifang

  2024, 46(4): 37-41. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.005

  Abstract ( ) PDF ( )

  Based on the hydro-topographical data of the area from 1989 to 2019, the study area is 34369 m². Establishing the DEM model, the paper used Kriging Interpolation and mathematical statistics to quantitatively analyze the mechanism of the erosion and deposition of Lvsi area. The results showed that the subsea terrain of Lvsi Area had turned from deposition to erosion in the past 30 years. The total sediment deposition volume was 54 million cubic meters from 1989 to 2006. The erosion started since 2006, and the total volume of the eroded sediment had been maintained between -5 and -13 million cubic meters. On the one hand, the erosion was attributed to the decreasing of the regional sediment supply due to the declining of the rate of sediment transport in Yangtze basin and along the coastline of northern Jiangsu. On the other hand, the hydrodynamic change of current and tide due to the reclamation projects along the coastline also caused the erosion.
• Hydrochemical characteristics and evolution mechanisms of the groundwater in the lower reaches of Hangshui river

  LIU Guanqun, LI Xiong, ZHANG Suqi

  2024, 46(4): 42-52. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.006

  Abstract ( ) PDF ( )

  The lower reaches of the Huangshui river was selected as a typical study area, and the hydrochemical composition of shallow groundwater in this area was analyzed employing multivariate statistical analysis, Piper three-line diagram, Gibbs diagram, silicate stability field diagram, ion ratio, calculation of water-soluble composition and reverse hydrogeochemical simulation. The results show that: (1) From the southeast to northwest of the study area, the concentrations of TDS and Cl gradually increased, and the water quality changed from freshwater to salt water. The dominant anion types of groundwater were along HCO₃→HCO₃·Cl→Cl·HCO₃→Cl changes. Na⁺ and Ca²⁺ were the major cation in most regions. (2) The weathering and dissolution of carbonate rock, evaporite and aluminosilicate were the main hydrogeochemical processes in the groundwater in this area. Besides, there was the positive cation alternate adsorption. (3) The results of reverse hydrogeochemical simulation quantitatively verified that the chemical composition of groundwater in the upper and middle reaches of Huangshui river was mainly controlled by rock weathering, the groundwater in the lower reaches was mainly affected by seawater intrusion, and cation exchange occurred under the influence of seawater intrusion.
• Study on grain-size characteristics and geotechnical properties of surface sediments in the northeast Qingdao sea area

  GUO Xijun, LI Anlong, JI Xiangkun, SHEN Kunming, CUI Enping

  2024, 46(4): 53-59. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.007

  Abstract ( ) PDF ( )

  Based on the data of 123 sea samples from Jimo city, Qingdao and the historical investigation data, this paper made a statistical analysis of the relationship between the indoor particle size parameters and the in-situ geotechnical characteristics, and obtained the sedimentary environment division of the study area and the correlation between the particle size parameters and the geotechnical parameters. The study showed that the sedimentary environment of the study area could be divided into coastal sedimentary environment, transitional sedimentary environment, shallow marine sedimentary environment and residual sedimentary environment. The correlation between grain size parameters and geotechnical parameters in different sedimentary environments was good, but the correlation formula was obviously different. These relationships could provide a basis for understanding the engineering geological conditions of the study area, and provide a reference for inversion of the engineering geological characteristics of the regional seabed by using the existing research data.
• The influence of naphthalene acetic acid and indole butyric acid on the growth of Oocystis sp.

  ZHENG Tianze, LIU Quanyu, KONG Xiangxian, LV Dongwei

  2024, 46(4): 60-65. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.008

  Abstract ( ) PDF ( )

  In this study, we explored the effects of two plant growth regulators naphthalene acetic acid (NAA) and indole butyric acid (IBA) with different concentrations on the growth of Oocystis sp. The results showed that the concentration of NAA and IBA promoter the algal growth at the concentrations ranging from 0.1 to 0.5 mg/L. The optimal concentration of NAA and IBA was 0.25mg/L. The two regulators inhibited the growth of Oocystis sp. at concentrations higher than 0.5mg/L. After the in-depth study on the effects of the two regulators, we found that the combined use of NAA and IBA is better than that of separated use in promoting the growth of Oocystis sp. The optimal synergistic concentration of both regulators was 0.25mg/L, and the concentration ratio was 1∶1.
• Analysis and evaluation of heavy metal pollution of Uca arcuate in the intertidal zone of Xiaoyangshan

  DING Jianxiang, XUE Junzeng

  2024, 46(4): 66-72. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.009

  Abstract ( ) PDF ( )

  The heavy metal contents of Cu, Hg, Pb, Zn, Cd, Cr and As in the surface water, suspended particulate matter, surface sediments and Uca arcuate in the Yangshan port and natural sea area were analyzed. The results showed that: the content of heavy metals in suspended particulates was significantly higher than that in surface sediments, Uca arcuate and surface water;the content of heavy metals in port waters was significantly higher than that in natural waters. In order to clarified the difference of heavy metal enrichment in different tissues of Uca arcuate, the contents of heavy metals in muscle, digestive tract, liver, gonad and gill were measured. The results showed that the contents of Cu, Pb, Zn, Cd and Hg in the digestive tract of Uca arcuate were significantly higher than those in other tissues. Values of single factor heavy metal pollution index analysis showed that As pollution was the most serious in each tissue compared with other heavy metals. Cd in the digestive tract and As in the gonads of Uca arcuate reached the heavy pollution level in two sea areas. The Nemero heavy metal pollution index showed that the gonadal tissue of Uca arcuate in the port area was slightly polluted, and all the others were at no pollution level.
• Research Report
• Research on the spatio-temporal evolution of coordinated development of marine economy, marine resources and environment in the coastal areas of China

  WANG Jieruo, YU Jing, SUN Huiying, ZHAO Yue, PAN Lin

  2024, 46(4): 73-80. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.010

  Abstract ( ) PDF ( )

  As China's marine economy accounts for an increasing proportion of the national economy,the protection of marine resources and the environment has become more important. It is particularly important to realize the coordinated development of marine economy and resources and environment. This paper built a evaluation index system of marine economy and resource environment, established the evaluation model of the coupling coordination degree of marine economy and resource environment, evaluated the coordinated development level of marine economy and resource environment in coastal provinces, and analyzed the temporal and spatial distribution characteristics of the coordinated development of China′s marine economy and resource environment. The research results showed that the coupling degree of marine economy and resource environment in 11 coastal provinces from 2007 to 2016 was developing towards a good coupling. The spatial distribution of marine economy and resource-environment coupling coordination degree was obviously different, and provinces with similar coupling coordination degrees had a certain clustering phenomenon. From north to south, they are: medium coordination type (Liaoning, Hebei) and high coordination type (Jiangsu, Zhejiang, Fujian, Shanghai, Guangdong).
• Studies on the potential and prospects of carbon sink fishery of Tianjin

  MA Lin, LI Chunyan, LI Mingze, LUO Xin, DING Ziyuan, MENG Muhan, XU Lintong, JIANG Jufeng

  2024, 46(4): 81-88. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.011

  Abstract ( ) PDF ( )

  In order to understand the potential of carbon sink fishery of Tianjin, the fishery production and carbon removal of carbon sink organisms identified from 2013 to 2022 were calculated. The results showed that the average yield of fishery output of Tianjin is 335300 tons in this period, of which the average annual freshwater aquaculture output is 271200 tons, accounting for 80.89% of the total. The overall carbon removal from fishery was stable at first, then decreased, and finally stabilized. The average annual carbon removal was 16500 tons. The average annual carbon removal of freshwater aquaculture was 10900 tons, accounting for 66.42%. The carbon removal of silver carp was the highest, 4900 tons. The average annual carbon removal of freshwater fishing industry was 900 tons, accounting for 5.39%. There was no seawater carbon sink organism was cultured, much less the carbon sink varieties of shellfish and algae. The carbon removal amount of mariculture was not discussed. The average annual carbon removal of seawater fishing industry was 4700 tons, accounting for 28.19% of the total. The rice-fish integrated farming is developing rapidly. Tianjin may take this opportunity to improve further the carbon sink capacity by practicing of carbon sink fishery strategy, thus improving the feeding efficiency, leveraging the carbon sink function of natural fisheries and optimizing aquaculture structures. In this way, Tianjin may respond well the double carbon strategy of China, and contribute significantly to carbon neutrality targeting.
• Spatial and temporal patterns of erosion and deposition in the lower Yellow River reaches and their controlling factors

  LI Guangyu, FAN Yongyong, WU Xiao, WANG Houjie, BI Naishuang

  2024, 46(4): 89-99. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.012

  Abstract ( ) PDF ( )

  This study used the cross-section topographic data of the river channel of the lower Yellow River reaches to systematically calculate the inter-annual and seasonal erosion-deposition volume of the main river channel from 1992 to 2011. The major results were presented as follows. From 1992 to 1999, the river channel of the lower Yellow River reaches silted continuously, with a cumulative siltation volume of 1.090 km³. After 2000, the channel shifted from siltation to erosion with a total volume of 1.597 km³ by 2011. On seasonal scale, two-stage pattern of channel evolution was presented. During the flood season from 1992 to 1999, the lower reaches of the Yellow River accumulated 1.471 km³, about 1.4 times of the annual siltation volume. Erosion dominated during dry seasons with a total of 0.473 km³, accounting for 32% of the siltation volume during the flood season. During the flood season from 2000 to 2011, the channel shifted from siltation to erosion with an accumulated volume of 1.148 km³, accounting for 75% of the annual erosion of the lower Yellow River. The erosion flux during dry seasons in 2000-2011 gradually decreased, and the cumulative erosion during the period was 0.381 km³, only 25% of the annual amount. Changes in water and sediment conditions as well as river channel features played critical roles in the evolution process of the river channel in the lower Yellow river reaches. After the implementation of the Xiaolangdi reservoir, the coefficient of sediment incoming decreased significantly, resulting that the river channel turned from siltation to erosion. The river regime coefficient of the lower river channel had dropped overall, and the lower river channel had become more stable.
• Economic loss assessment of typhoon disaster by integrated learning based on sparse self-coding

  XU Xinwei, DENG Jiajia, TAO Fei, ZHU Junjie, ZHOU Jun

  2024, 46(4): 100-106. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.013

  Abstract ( ) PDF ( )

  In order to eliminate the multi-collinearity between typhoon disaster data indicators and the over-fitting in the training process, this paper used sparse self-coding network to extract nonlinear features of typhoon disaster data in Guangdong province as the input of BP neural network. The output results of neural network were integrated by Bagging method to predict direct economic losses. In order to verify the advantage and effectiveness of sparse self-coding algorithm in feature extraction, the principal component model was introduced for comparative analysis. The experimental results showed that the sparse self-coding network could extract nonlinear features and predict them, and its prediction accuracy is better than that of the linear dimension reduction method represented by principal component analysis. It also proved that the prediction effect of the integrated neural network proposed in this paper was better than that of the multi-layer BP neural network. It was proved that this method was an effective method to solve the problem of economic loss assessment of typhoon disasters, and had a certain application reference value.
• Analysis on the annual water temperature change of sea cucumber ponds in Lushun

  LI Lezhou, LU Yuting, WANG Wenlin, SUN Yahui, WANG Yulong, YANG Gengjie, ZHOU Wei

  2024, 46(4): 107-112. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.014

  Abstract ( ) PDF ( )

  In order to find out the annual water temperature change of sea cucumber breeding ponds in Lushun, three adjacent sea cucumber breeding ponds with the same management method were observed for one year. The results showed that the surface and bottom water temperatures of sea cucumber ponds changed with air temperature during the year. In vertical distribution, the bottom water temperature in March was significantly higher than the surface water temperature, and the surface water temperature during the day in spring was significantly higher than that of the bottom water. The water temperature at 80-120 cm depth was significantly lower than that of other water layers in summer, and there was no significant difference in the water temperature each water layer in autumn and winter. At the same time, the observation of the vertical distribution of dissolved oxygen and salinity each season showed that the surface dissolved oxygen in spring and summer is significantly higher than that of the bottom layer, and the surface salinity in summer is significantly lower than that of the bottom layer. The survey results preliminarily showed that sea cucumber breeding ponds in Lushun are prone to stratify from the spring ice period to the summer high temperature period, which is unfavorable for sea cucumber aquaculture production. Farmers should extend the working hours of aerators to promote water exchange on the basis of natural water exchange. Farmers can also install on-line monitoring equipment for surface and bottom water quality, and start aerators in time when the water has a layered development trend.
• Spatiotemporal distribution characteristics of carbonate system in Sanggou bay and their influencing factors

  DING Yidan, ZHU Lin, FENG Juan, SUI Qi, SUN Xuemei, ZHAO Xinguo, XIA Bin, CHEN Bijuan, QU Keming

  2024, 46(4): 113-120. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.015

  Abstract ( ) PDF ( )

  In order to investigate the influence of various aquaculture mode on the carbonate system in Sanggou bay, a field survey, including seaweed, shellfish-seaweed, shellfish-fish and shellfish culture, was conducted in the open sea area in Sanggou bay in April, July, October and December, 2019. Temperature, salinity, pH, dissolved oxygen, total alkalinity (TA), dissolved inorganic carbon (DIC) and partial pressure of carbon dioxide (pCO₂) were analyzed. In addition, the air-sea carbon dioxide flux (FCO₂) was calculated. The results showed that the main influencing factors of carbonate system in Sanggou bay algae culture area were algae growth and offshore seawater exchange. The carbonate system in the shellfish culture area was affected by both shellfish respiration and calcification. Because of the FCO₂ in Sanggou bay shellfish culture area was negative and was a CO₂ sink area, the calcification of shellfish in this area could be stronger than respiration. The FCO₂ of Sanggou bay aquaculture area in spring, summer, autumn and winter were -66.60±16.82, -52.44±21.66, -74.00±11.45 and -92.65±34.13 mmol·m^-2·d^-1 respectively, indicating that they were the sink of CO₂. The carbonate system in Sanggou bay was affected by aquaculture action, and there were significant differences among different aquaculture modes.
• Comprehensive analysis and evaluation of habitat quality of Songjiang perch resource reserve in Jinghai Bay

  MENG Di, XIA Bin, SUN Xuemei, CHEN Bijuan, QU Keming

  2024, 46(4): 121-129. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.016

  Abstract ( ) PDF ( )

  Jinghai Bay Songjiang Perch Conservation Area have high economic and ecological values. Grasping the quality of its ecological environment is of a great significance. Based on the monitoring data of nutrients, heavy metals and other environmental factors in 2017, 2019 and 2020, and by using the comprehensive quality index method, we comprehensively evaluated the ecological environment quality of the sea area. The main factors affecting the water quality of the investigated sea area were analyzed through principal component analysis. The eutrophication and pollution of heavy metal were also evaluated. The results showed that the surface seawater quality is at a state of light pollution in 2017 and 2019; the surface seawater quality is permitting in 2020 with the value ranges from 0.80 to 1.73. The results of principal component analysis showed that COD, DIN, Cu, Cd and Zn (>0.9) are the main environmental factors affecting the water quality of Jinghai Bay nature reserve. The organic pollution index varied between 4.68 and 12.59, indicating that the bay is severely polluted. The eutrophication level of Jinghai Bay in 2017 was at an eutrophication state. The bay was at the potential eutrophication state with nitrogen limitation in 2019 and 2020. We should actively reduce the organic pollution and eutrophication of Jinghai Bay Reserve in future, pay attention to the heavy metals, and actively take the prevention measures.
• Background nutrient salt concentration determination of artificial and aged natural seawaters used in seawater nutrient analysis

  REN Hongwei, CHEN Lichao, HU Yubin

  2024, 46(4): 130-134. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.017

  Abstract ( ) PDF ( )

  Nutrient assay is essential in the routine oceanographic surveys. The nutrients of seawater are determined on a continuous flow analyzer usually requires artificial seawater or aged low-nutrient natural seawater as the basal solution of standard calibration and the rinsing solution of the assaying system when seawater sample is changed. In this study, the concentrations of components (phosphate, nitrite, nitrate, ammonia nitrogen and silicate) in Sigma, Aladdin and Sinopharm sodium chloride (GR grade) solutions and aged West Pacific seawater were determined. The results showed that the concentrations of nitrite, nitrate, ammonia nitrogen and silicate varied in the three commercial sodium chloride salt solutions except phosphate. In contrast, the concentration of silicate was relatively high and trace amount of nitrite was found while the other three nutrients were not detectable in the aged West Pacific seawater.
• Research Review
• Research progress of marine carbon sequestration- visual analysis based on Citespace

  ZHANG Jian, YANG Weihua, LIU Ping, SUN Haoran, CUI Zixuan

  2024, 46(4): 135-142. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.018

  Abstract ( ) PDF ( )

  Using Citespace software, 2496 and 135 literatures in the field of marine carbon sequestration searched in Web of Science core collection and CNKI database were analyzed by bibliometrics visualization, and the research development process, research hotspots and frontiers in the field of marine carbon sequestration were analyzed from the aspects of published volume, countries and regions, institutions, periodicals and keywords. The volume of articles published abroad showed a linear growth trend, while the trend of domestic articles did not conform to the linear growth trend. From the perspective of national and regional cooperation, Germany, Canada, Australia and the Netherlands cooperated most closely and had the greatest impact on this field. In terms of the level of institutional scientific research, the United States had the largest volume of papers and the most influential, Woods Hole Oceanog. Inst. had the strongest influence in this field. The main international journals were Global Biogechemical Cycles, Biogeo Sciences and Geophysical Reasearch Letters. The main domestic journals were Scientia Sinica (Terrae), Progress in Fishery Sciences, Marine Sciences and so on. Foreign research hotspots mainly focused on marine carbon sequestration and its role in dealing with climate change, the frontier of research was the impact of global storage of blue carbon on climate change. Domestic research hotspots were the mechanism of marine carbon sequestration and ocean acidification, and the research frontier was roughly the same as abroad.
• A research on the bigeye tuna catch quotas system of the international commission for the conservation of Atlantic tunas

  WANG Xiaojun, ZHANG Li

  2024, 46(4): 143-151. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.019

  Abstract ( ) PDF ( )

  The International Commission for the Conservation of Atlantic Tuna (ICCAT) determines the annual total allowable catch of bigeye tuna (BET) and implements the fishing quota system according to the basic principles of the two-year historical average catch from 1991 to 1992. By sorting out the standards of quota allocation, suggestions and reports relating to the quota system over the years, and combining the nominal catch of BET of China and the implementation of the quota system, we have dug out four core standards for the development of ICCAT catch quota system, the average historical catch of the 1991-1992, the undeveloped quota not exceeding 15% of the total of the country can be transferred under ICCAT authorization, the overfishing will be penalized for two consecutive management periods, and the quota for the fishing year will be adjusted to the next year. Four suggestions have been put forward to safeguard the interests of China's Atlantic BET fishery, which included improving the quota allocation system of BET; actively participating in the consultation of quota formulation, strengthening the ability of Chinese administrative departments, scientific research departments to participate in international fishery consultation and negotiation, and strengthening the capacity of fulfilling the Atlantic tuna fishery.
• Game analysis of marine administrative behaviors against the marine spatial planning perspective

  JIANG Yong, ZHU Qinglin, AN Taitian, SHI Yaping, LIU Ruohan, ZHANG Jie, QU Jiarun, WANG Anning

  2024, 46(4): 152-157. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.020

  Abstract ( ) PDF ( )

  The development and utilization of the ocean in China cannot be separated from its effective management by the main body of marine administration. However, the central government and local governments are still not fully cooperative. In this paper, we made a game analysis of marine administrative subjects in marine spatial planning. First, we defined the main body of marine management in current system. Second, against the perspective of marine space planning, we analyzed the main body of marine administration and its centralized and decentralized management system by game. The results showed that the marine administration in China can adopt the approach of setting up marine spatial planning. Centralized management system is appropriate. In other words, the central government may directly participate in the unified management of marine spatial planning in a straight and vertical way.
• Research on spatial governance model of coastline security protection in Shenzhen

  WANG Jiangbo, ZHANG Lingyun, GOU Aiping

  2024, 46(4): 158-163. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.021

  Abstract ( ) PDF ( )

  With the increasing frequency of coastal disasters and the advancement of national spatial governance, coastal safety protection has gradually become one of the important contents of urban spatial governance. There are many shortcomings in the current urban coastline safety protection space governance work, which cannot meet the growing safety protection needs of the public and hinder the overall process of urban governance. This article takes Shenzhen as an example to analyze the current situation and problems of coastal safety protection space governance, and combines foreign experience to propose innovative strategies for governance models.
• Analysis of vessel charter mechanism of Western and Central Pacific Fisheries Commission

  SUN Ning, DAI Xiaojie

  2024, 46(4): 164-172. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.022

  Abstract ( ) PDF ( )

  The Western and Central Pacific FisheriesCommission (WCPFC), a regional fishery management organization, was established in 2004, which is responsible for conserving and managing the highly migratory fish stocks in Western and Central Pacific Ocean. There are currently 26 members, 7 participating territories and 9 cooperating non-members parties, of them, 19 belong to small island developing states (SIDS). SIDS have abundant fishery resources and good fishing grounds in the exclusive economic zone, and the potential to be exploited in the future. Distant Water Fishing Nations (DWFN) have fishing capacity to exploit the tuna stocks, but not the ideal fishing grounds. In order to increase the fishing opportunity and explore fishing grounds for DWFN, and facilitate SIDS tuna fisheries, the WCPFC adopted the conservation and management measures of vessel charter notification during the sixth regular session of WCPFC in 2009. By analyzing the vessel charter mechanism of WCPFC, in this article we presented the current situation of the Chinese-flag tuna fishing vessels chartered by SIDS, aiming to overcome the limitations of the vessel charter mechanism. China should actively promote the establishment of multi-year charter mechanisms with SIDS, continue to promote bilateral cooperation among SIDS governments, increase land-based investment in island countries, and enhance the possibility of Chinese-flag tuna fishing vessel being chartered, thus win the living space for China distant water enterprises. While quotas and the number of vessels are restricted, a variety of cooperation methods should be explored, actively participate in the international affairs and fight for legitimate rights and interests.
• Studies on the public-private-partnership model in environmental management of fishing ports

  JIN Ziman, LV Ming

  2024, 46(4): 173-181. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.023

  Abstract ( ) PDF ( )

  Fishing port is an important strategic area for the development of fishery economy. The environmental governance is also a staple of integrated management reform of fishing ports. With the environment expenditure of our country, the control of environmental pollution in the fishing port has been on the agenda. The government provides public services through the public-private-partnership (PPP) model, and promotes the improvement of the environmental pollution of the fishing port by virtue of the advantages of social forces in capital, technology and management. The cooperative governance between government and enterprises makes the pollution treatment professional and scientific. In this paper, we analyzed the necessity and feasibility of PPP model in fishing port environmental governance based on the experience of Taizhou fishing port. We also analyzed the plight of the PPP model in fishing port environmental governance. We optimized the PPP model for the fishing port environment governance of government and enterprises into a mutual cooperation, risk sharing and benefit sharing model.
• Construction of the evaluation index system of island ecological civilization based on SAVEE method: a case study of Shigongliao island and Hailing island

  CHEN Shaoyang, LIU Na, TONG Zhaoduo, LIU Zhenwen

  2024, 46(4): 182-189. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.024

  Abstract ( ) PDF ( )

  As an integral part of national territory, islands play an important role in safeguarding maritime rights and interests. However, in recent years, with the development of islands by mankind, the ecological environment of the islands has been destroyed, and the construction of ecological civilization is not optimistic. Therefore, the ecological protection of islands should be strengthened, and the construction of islands’ ecological civilization should be emphasized. China has a large number of islands and the ecological environment is complex. To protect the island’s ecological civilization, it is necessary to establish a complete and effective evaluation index system for the construction of island ecological civilization. This study applied the SAVEE method, took five major aspects of ecological civilization as primary indicators, selected 21 secondary indicators to construct an indicator system, and used the constructed evaluation indicator system to select Shigongliao island and Hailing island for comparative evaluation and analysis. This study put forward countermeasures and suggestions based on the evaluation results. The results showed that the level of ecological civilization construction on Hailing island was significantly higher than that of Shigongliao island, especially in terms of ecological protection and infrastructure construction. The model quantified the level of island ecological civilization construction, consistent with the actual island ecological civilization development status, verified the applicability of the model in the field of island ecological civilization, and provided data support for the ecological civilization construction of Chinese islands.
• Research advances on the biological characteristics and breeding technology of seahorse (Hippocampus abdominalis)

  ZHANG Yongming, DONG Dengpan, WANG Haiyan, WANG Yuyu, GAN Qifeng, TENG Fuhai

  2024, 46(4): 190-199. https://doi.org/10.13984/j.cnki.cn37-1141.2024.04.025

  Abstract ( ) PDF ( )

  The seahorse (Hippocampus abdominalis) inhabits southwestern Pacific Ocean and the waters near Oceania and New Zealand. Its large size, strong disease resistance and high survival rate in seedling cultivation make this species high in medicinal and economic values. In recent years, continuous global climate change has been impacting the marine ecosystems and reducing the natural resource of this species. Such scenario is even becoming worse due to the market demand increase. As a result, H. abdominalis has been listed in Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora(CITES). The researches relating to its resource conservation and development, reproductive biology and aquaculture technology are receiving intensifying attentions. In 2016,H. abdominalis was introduced into China where its artificial breeding of seedlings has met success and boomed currently. In this paper, we summarized the research findings in the biology and artificial breeding of H. abdominalis, and prospected the research direction, trying to provide a powerful reference for the resource protection and artificial breeding technology development of H. abdominalis.