Development Of Marine Economy Research Articles

Hot spots, evolutionary trends, and future prospects for the sustainable development of the marine economy in the past 30 years: a comparative bibliometric analysis based on CiteSpace

How to assess the quality of sustainable development is an important issue for the marine economy. This study examined studies on sustainable development of marine economy over the past 30 years using core databases from China National Knowledge Infrastructure and Web of Science. This study introduced bibliometric analysis methods and CiteSpace software to track and comparatively analyze the hotspots of studies from 1994 to 2023. This study showed that (1) the research on sustainable development of the marine economy has achieved extensive results. Researchers have already collaborated with those in China. (2) Hotspots for Chinese research are mainly focused on building an indicator system of marine economy's sustainable development, realizing the path of sustainable development of regional marine economy, and planning the sustainable development goals of specific marine industries. In contrast, other countries focus on protecting marine ecology and identifying the path of sustainable development of the marine industry. (3) Strengthening exchange and cooperation between institutions and scholars from various countries, and further studies on the micro-paths of blue carbon sinks, marine ecological civilization and high-quality development, low-carbon development of marine industries will become new hotspots for research.

Research on the driving effect of marine economy on the high-quality development of regional economy – Evidence from China’s coastal areas

Exploring the driving effect of the marine economy on high-quality economic development can help improve the quality of national economic development and optimize the direction of marine economic development. Based on the data of China’s coastal areas from 2006 to 2019, this study adopts the entropy weight-TOPSIS method to comprehensively evaluate the level of marine economy and the high-quality economic development in coastal areas. Further, we use random forest regression and partial dependence plots to reveal the driving effect of the marine economy on the advancement of high-quality economic growth in China’s coastal areas. The results show that the driving effect of the marine economy on the high-quality development of coastal areas is affected by the moderating effect of the economic elements, and regions should choose their development paths according to the location of their elements in the optimal interval. Our research results can provide a scientific foundation for the formulation of differentiated economic high-quality development policies in China’s coastal areas.

Edge‐guided representation learning for underwater object detection

AbstractUnderwater object detection (UOD) is crucial for marine economic development, environmental protection, and the planet's sustainable development. The main challenges of this task arise from low‐contrast, small objects, and mimicry of aquatic organisms. The key to addressing these challenges is to focus the model on obtaining more discriminative information. The authors observe that the edges of underwater objects are highly unique and can be distinguished from low‐contrast or mimicry environments based on their edges. Motivated by this observation, an Edge‐guided Representation Learning Network, termed ERL‐Net is proposed, that aims to achieve discriminative representation learning and aggregation under the guidance of edge cues. Firstly, an edge‐guided attention module is introduced to model the explicit boundary information, which generates more discriminative features. Secondly, a hierarchical feature aggregation module is proposed to aggregate the multi‐scale discriminative features by regrouping them into three levels, effectively aggregating global and local information for locating and recognising underwater objects. Finally, a wide and asymmetric receptive field block is proposed to enable features to have a wider receptive field, allowing the model to focus on smaller object information. Comprehensive experiments on three challenging underwater datasets show that our method achieves superior performance on the UOD task.

Impact of marine industrial agglomeration on high-quality marine economic development: the mediating effect of knowledge spillover

Industrial agglomeration significantly influences economic development; however, its impact on high-quality economic growth within the marine industry remains understudied. We conducted a study using panel data from 11 coastal provinces in China (2008–2020) and used the entropy method to quantify high-quality marine economic development (HQMED). Our study meticulously examines the direct, mediating, and nonlinear effects of marine industrial agglomeration (MIA) on HQMED. The key findings include the following: (1) There is a steady HQMED growth and reduced interprovincial gaps. (2) MIA significantly enhances local HQMED and leads to positive spatial spillover to adjacent regions. (3) The analysis of the mediating effect highlights the pivotal role of knowledge spillover in MIA’s influence on HQMED. (4) Threshold analysis shows significant MIA effects on local and neighboring HQMED using knowledge spillover as a threshold variable. The study’s findings hold theoretical and practical significance and guide MIA’s role in fostering sustainable marine economic development in China.

Construction of copper-functionalized two-dimensional zeolitic imidazole framework-7 (ZIF-7) nanosheets for enhanced antibacterial and antibiofilm performance

Marine biological pollution restricts the sustainable development of marine economy. Cu2O stands as a predominant antifouling agent for developing marine resources engineering. However, the problems of easy aggregation, rapid failure, and explosive release of copper ions limit the practical application of Cu2O. In this work, a novel copper-functionalized two-dimensional zeolitic imidazolate framework-7 nanocomposites ZIF-7@Cu2O was successfully fabricated by in-situ growth methodology. The emergence of ZIF-7@Cu2O nanocomposites solves the above problems in the use of Cu2O. Due to the huge specific surface area of the 2D ZIF-7 nanosheets and the electrostatic interactions, the cubic Cu2O, with a diameter of 250 nm, can be uniformly and firmly anchored on the surface of 2D ZIF-7 nanosheets, thus effectively avoiding the rapid dissolution of cuprous oxide and reducing the release rate of copper ions. Antibacterial experiments demonstrate that, in comparison to ZIF-7, Cu2O, and ZIF-7/Cu2O (physical mixture of ZIF-7 and Cu2O), ZIF-7@Cu2O exhibits superior antibacterial properties with 99.99 % against E. coli and the minimum inhibitory concentration (MIC) of 32 μg/mL. Furthermore, the reactive oxygen species (ROS) assay confirms ZIF-7@Cu2O could promote the generation of ROS. Antibiofilm formation results reveal that ZIF-7@Cu2O nanocomposites are effective in preventing biofilm formation of E. coli and P. aeruginosa at a low concentration (50 μg/mL). Finally, ZIF-7@Cu2O nanocomposites are employed as fillers to prepare ZIF-7@Cu2O/EP composite coating, the bactericidal kinetics and bacterial adherence on the coating surface are investigated. We believe this work could provide novel insights into the rational design of 2D ZIF-based material in the field of antifouling.

Research on the Development Path of Green Marine Economy in the Era of Ecological Civilization

This article explores the development path of the green marine economy in the era of ecological civilization. It highlights the importance of developing a green marine economy and how it has become a global consensus. The article suggests that China should take proactive measures to optimize its marine industrial structure, promote marine scientific and technological innovation, strengthen marine resource protection and environmental governance, and enhance the competitiveness of the marine economy. The ultimate objective is to achieve sustainable development of the ocean, expand the blue economic space, and accomplish the goal of green marine economic development.

Impact of the coupling relationship between marine industry and regional development on the marine economy

To investigate the relationship between the marine industry and regional development, and assess its impact on the marine economy. The study creates an evaluation index system for the coupling relationship between the marine economy and regional development. It applies coupling theory and combines the hierarchical analysis method with the entropy weight method to determine the weight of each index. By constructing the coupling degree and coupling coordination degree model, this paper quantitatively analyzes the coupling relationship and applies the coefficient of variation to assess the coordinated development differences between different regions. The study utilized data from the official China Marine Statistical Yearbook. The analysis revealed an upward trend in the coupling degree of the marine economy and regional development during the study period, increasing from 0.58 to 0.72. This indicated a significant strengthening of the interaction and synergistic development between the two. In typical coastal areas, the coupling degree increased from 0.62 to 0.78, indicating the significant contribution of the marine industry to the region's comprehensive economic development. The study proposes policy recommendations to enhance the adjustment of the marine industrial structure and technological innovation, promote inter-regional cooperation and resource sharing, and strengthen marine environmental protection and sustainable resource utilization. These measures aim to promote the development of the marine economy while safeguarding marine resources.

Where Is the Path to Sustainable Marine Development? Evaluation and Empirical Analysis of the Synergy between Marine Carrying Capacity and Marine Economy High-Quality Development

Enhancing the marine carrying capacity (MCC) is of important value in hastening the transformation of the marine economy and realising the marine economy high-quality development (MEHD). We explore the synergistic mechanism between the MCC and MEHD and its comprehensive indicator system, measure the synergistic relationship between China’s MCC and MEHD from 2006 to 2020 using the improved TOPSIS model and the composite system synergism model, and explore the influencing factors and their interactions using geographic probes. The research findings are (1) that China’s MCC and MEHD show a growing trend during the study period, in which marine green development is at a higher level and the cultivation of marine knowledge improves most significantly, but the general value of the MEHD is relatively low. (2) In terms of the synergistic relationship, the degree of ordering of the two shows a sustained rising trend, and the degree of ordering of the marine economy development as a whole is higher than the MCC; the degree of synergy is increasing, but the general value of synergistic development is low. (3) The main factors driving the MCC and MEHD are the marine consumption capacity, the marine opening, and the marine industrial structure; the explanatory power of most factor interactions tends to decrease, and the explanatory power of the interactions among the development of land-based economy, the marine industry structure, and the marine economy increase, and the impacts of the different factor interactions on the synergistic development are all greater than the factors. The influence of different factors on synergistic development is greater than the influence of each factor alone.

Research on the Integrated Development of Marine Culture and Tourism Enabling the Common Prosperity of Islands

The integrated development of Marine cultural tourism and the common prosperity of islands is an important path to promote the development of Marine economy and realize the common prosperity of islands. This paper summarizes the research results of the integrated development path, strategy and case analysis of Marine cultural tourism and island common prosperity, summarizes relevant policy suggestions and practical experience, and provides reference for Marine economic development and island common prosperity.

Mapping of nearshore bathymetry using Gaofen-6 images for the Yellow River Delta-Laizhou Bay, China

Bathymetric mapping is integral to maintaining marine ecosystems, managing coastal zones, and safeguarding the environment. However, achieving accurate large-scale bathymetric maps remains a challenge in China, particularly in nearshore turbid waters. To address this gap, we leveraged seasonal Gaofen-6 (GF-6) data to conduct bathymetry mapping in the Yellow River Delta-Laizhou Bay area. In our study, we found that longer wavelengths, such as those in the red-edge2 and near-infrared (NIR) bands, exhibited superior performance in determining bathymetry. Moreover, specific band ratios derived from GF-6 data—such as Blue/NIR (BN), Violet/NIR (VN), Blue/Red-edge2 (BE), Violet/Red-edge2 (VE), Green/NIR (GN), and Green/Red-edge2 (GE)—showed promising outcomes, particularly in turbid nearshore waters. When comparing models, the random forest regression (RFR) model outperformed the classification and regression trees (CART) model in turbid nearshore areas, showing higher R2 values and lower RMSE. Notably, both models demonstrated higher accuracy in March compared to May and October. Incorporating the Normalized Difference Turbidity Index (NDTI) notably improved bathymetric results, especially in turbid sea regions. Furthermore, nearshore bathymetry proved highly susceptible to natural processes, seasonal variations, and human activities. The significant discrepancies in bathymetry among coastal areas emphasize the need for tailored management strategies to enhance coastal management and foster sustainable marine economic development.

The coordination of technological and financial innovation concepts on the marine economy and its ecological development

This study first constructs an evaluation index system based on the pressure state response model, and assigns weights through entropy method and coefficient of variation method, providing theoretical and methodological support for comprehensive measurement and evaluation. Second, the least squares decision model is introduced and the PVAR model is used to analyze the development level of China's marine economy, ecology, and technological and financial innovation. The results indicated that from 2012 to 2022, the marine economic development level, marine ecological development level, and marine technology and financial innovation development level of 9 coastal provinces in China all showed a certain growth trend. However, in terms of the level of marine ecological development, various provinces had shown a downward trend, with Hebei performing the best, with an average of 0.230. Although various regions have achieved significant development in marine economy, ecology, and technological and financial innovation, the level of development varies among regions, and some regions have relatively low levels of technological innovation. The pressure and challenges between the marine economy and ecological environment protection caused by these real environments remain significant.

Obstacles to the development of China's marine economy: Total factor productivity loss from resource mismatch

The total factor productivity (TFP) of the marine economy loss due to the resource mismatch remains a major obstacle to the development of China's marine economy. This study analyzes the intrinsic mechanism of the four types of capital mismatches, including natural, knowledge, social, and institutional, affecting the TFP of the marine economy. Firstly, the Stochastic Frontier Analysis model is used to obtain the TFP in 11 Chinese coastal provinces from 2000 to 2020. Then the four types of capital are unified into the HK model to study their spatio-temporal characteristics, and the extended Syrquin decomposition is used to analyze the sources of the changes in the marine economic output during the whole study period. At the same time, we estimate the output gap and the contribution of distortionary changes in each type of resource. Finally, we use Bootstrap to measure the impact of each type of resource mismatch on TFP. The results show that ① TFP is on the rise and belongs to the middle level. Nevertheless, there is a slow growth rate, noticeable regional differences, with a specific "path dependence". ② All capitals are distorted, and only the distortion coefficient of natural capital is greater than 1. Spatially, resources are under-allocated in the economic pioneer regions and over-allocated in the latecomer regions. ③ At present, China's marine economic growth is mainly driven by resource inputs. Correcting the inter-regional resource distortion can raise output by 21%. ④ The contribution of knowledge and social capital distortions is positive but small, while institutional and natural capital contribute more but fluctuate sharply. Resource allocation tends to be rationalized in Shanghai, Zhejiang, Fujian, Shandong, and Guangdong. ⑤ The mismatch of natural capital shows an “inverted U-shaped” trend, with 2006 as the "inflection point". The mismatch of knowledge, social, and institutional capital shows a decreasing trend and remains stable. Mismatch of all capitals harms the TFP of the marine economy, and institutional capital mismatch has the greatest impact. This assessment framework can measure the extent of other resource mismatches in other regions of the world, and the results of the study can provide lessons for localities to promote efficient resource allocation and enhance TFP in the marine economy.

An Evaluation and Difference Analysis of the High-Quality Development of China’s Marine Economy

The marine economy is a vital component of boosting the high-quality development of the Chinese economy. According to the concept of high-quality development, we construct the evaluation indicator system to measure the level of high-quality development of the marine economy by means of the combined empowerment method. We explore the coupling coordination relationship and evolution trend with the coupling coordination degree model, and finally, we analyze the regional differences using the Dagum Gini coefficient. The results show that, (1) from the perspective of time, China’s marine economic high-quality development index has been steadily improving, but there is still great potential for progress. From the perspective of spatial characteristics, the eastern marine economic circle has the best level of high-quality economic development. (2) From 2012 to 2022, the coupling coordination degree of high-quality development of the marine economy experienced five stages, from the verge of disorder to finally stepping into the good coupling coordination stage. (3) The overall difference in the marine economy is gradually narrowing. Among the three major marine economic circles, the southern marine economic circle has the largest internal discrepancy, which has become an important factor affecting the high-quality development of the marine economy. The above research results helped relevant decision-making departments to deeply understand the status quo and outstanding contradictions of the high-quality development of the marine economy in China.

Research on countermeasures of China’s Marine culture dissemination under the background of maritime power--Take Zhoushan City of Zhejiang Province as an example

The development of Marine cultural tourism is an important measure to promote the development of Marine economy under the background of maritime power. The report on the work of the 20th National Congress of the CPC emphasized speeding up the construction of a maritime power and promoting the dissemination and development of Marine culture. China's Marine culture is rich and diverse, but the coastal cities are faced with many problems in the actual dissemination process, such as the characteristics of Marine culture are not prominent, homogenization is serious, and integration construction is not formed. This paper starts with the current situation of Marine culture communication, analyses the existing practical experience and existing problems of Marine culture communication, and takes Zhoushan City, a famous coastal city in Zhejiang Province, as an example to discuss the countermeasures for the construction of China's Marine culture communication system under the background of maritime power, so as to promote the new development of Marine culture communication.

区域海洋科技金融对海洋经济高质量发展的影响研究

区域海洋科技金融对海洋经济高质量发展的影响研究

Performance Analysis of a WPCN-Based Underwater Acoustic Communication System

Underwater acoustic communication (UWAC) has a wide range of applications, including marine environment monitoring, disaster warning, seabed terrain exploration, and oil extraction. It plays an indispensable and increasingly important role in marine resource exploration and marine economic development. In current UWAC systems, the terminal nodes are usually powered by energy-limited batteries. Due to the harshness of the underwater environment, especially in the ocean environment, it is very costly and difficult, even impossible, to replace the batteries for the terminal nodes in UWACs, which results in the short lifetime and unreliability of the terminal nodes and the systems. In this paper, we present the application of a wireless powered communication network (WPCN) to the UWAC systems to provide an auxiliary and convenient energy supplement for solving the energy-limited problem of the terminal nodes, where the hybrid access point (H-AP) transfers energy to the terminal nodes in the downlink. In contrast, the terminal nodes use the harvested energy to transmit the information to the H-AP in the uplink. To evaluate the proposed WPCN-based UWAC systems, we investigate the performance of the average bit error rate (BER), outage probability, and achievable information rate for the systems in a frequency-selective sparse channel and non-white noise environment. We derive the closed-form expression for the probability density function (PDF) of the received signal-to-noise ratio (SNR). Based on this, we further derive novel closed-form expressions for the average BER and the outage probability of the systems. Numerical results confirm the validity of the proposed analytical results. It is shown that there exists an optimal signal frequency and time allocation factor for the systems to achieve optimal performance, and a larger optimal time allocation factor is preferred for a smaller hybrid access point (H-AP) transmit power or a larger transmission distance, while a smaller optimal signal frequency is required for a larger transmission distance.

Impact of marine industrial agglomeration on the high-quality development of the marine economy——A case study of China's coastal areas

Although the high-quality development of the marine economy has become a new paradigm to explore sustainable development in China, the path to its realization remains unclear. One path being explored in China is industrial agglomeration, but whether industry clustering leads to high-quality development of the marine economy has not been fully explored. Thus, the impact of industrial agglomeration on the marine economy deserves further investigation. This study first establishes a five-dimensional index system (innovation, coordination, greenness, openness, and inclusivity) to gauge the quality of marine economic development and then applies a hybrid method to evaluate each dimension. Furthermore, from an industry perspective, this study explores the influence mechanism of marine industry agglomeration on the high-quality development of China’s marine economy from several dimensions. The results show that (1) different regions have significantly different development levels, and the growth rates vary across each dimension. (2) From a broad standpoint, marine industry clustering has greatly promoted high-quality economic development in four sectors: innovation, coordination, openness, and inclusivity. However, its impact on green development has a time lag. (3) From the perspective of geographical heterogeneity, the impact of industry clustering is insignificant in the Bohai Rim region, positive in the South China Sea region, and negative in the Yellow Sea and East China Sea. Our study can enrich the research in this field and provide reference for the development of marine industry and marine economy in coastal areas.

Ecodevelopment strategy selection and case simulation of marine ranching enterprises based on evolutionary games

In the context of China’s “dual carbon” goals of carbon peak and carbon neutrality, the ecodevelopment of marine ranching enterprises (MREs) can provide new opportunities for economic growth and environmental protection. MRE ecodevelopment not only enhances the value of enterprise products but also helps restore the marine environment and protect fishery resources, thus promoting the sustainable marine economy development. Since marine ranch development is guided by the government, government regulation and incentives play an important role in MRE ecodevelopment. Based on the principle of participating subjects’ limited rationality, this study constructs an ecodevelopment game payment matrix involving central government regulation, local governments, and MREs and analyzes their decision-making processes. Using MATLAB, parametric analysis and numerical simulation are conducted to reveal the development behaviors of the government and MREs and their influencing factors. The results are as follows: Initial willingness to participate has different influences on the two participating subjects. Government incentive policy has a greater influence on MREs, and the punishment by the central government and monitoring positively contribute to the behavioral choices of the MREs and the government. These findings can help governments formulate mechanisms to promote MRE ecodevelopment. Specifically, we recommended that the governments promote MRE ecodevelopment by establishing hierarchical supervision and management organizational systems, improving policy, and formulating reasonable reward and punishment mechanisms.

Evolution of marine ecology-industry symbiosis patterns and ecological security assessment: New evidence from coastal areas of China

Marine ecological security is an important precondition and foundation for the development of marine business. Scientific and effective assessment of marine ecological security is of great significance for promoting the sustainable development of marine economy and building an ecological civilization. Based on the symbiosis theory, this paper focuses on the key role of human economic activities in the evolution of ecological security from the perspective of eco-industrial symbiosis and constructs a symbiotic system of indicators considering human economic activities and all subsystems with the help of the “Driver-Pressur-State-Impact -Response (DPSIR) model” analysis logic. This paper adopts the Lotka-Volterra symbiosis model to dynamically analyze the causes of the symbiotic coupling relationship of marine ecological security in China's coastal areas from 2006 to 2019. The research results show that the socio-economic development index shows a stable upward trend, the environmental capacity index basically remains stable, and the ecological impact index shows a fluctuating and undulating trend. During the sample period, there were only four modes of mutualism symbiosis, ecological single damage, industrial single damage, and mutual harm symbiosis in coastal areas. Hebei, Guangdong, Guangxi, and Hainan provinces are dominated by the optimal ecological security state. Tianjin, Jiangsu, Shanghai, Zhejiang, and Fujian are mainly in the security transition area; Shandong and Liaoning provinces are in a state of ecological security dominated by non-safe areas. Finally, relevant policy suggestions are put forward, in order to provide decision-making reference for improving marine ecological security and promoting the healthy development of the marine industry.

Evaluation of China's maritime power construction index and policy textual analysis

PurposeThis research establishes an evaluation index system and calculation method for the China's maritime power construction index (CMPCI). It has conducted practical tests on the progress of China's maritime power construction since the 12th–13th Five-Year Plans. This paper conducts a phased study on the construction of China's maritime power based on the CMPCI evaluation results; it expands the relevant achievements in the research field of quantitative research in China's maritime power construction. The verification results are consistent with the actual situation.Design/methodology/approachFully reflect the guiding role of national marine policies in the new development stage, guide the transformation of China's marine management model. The CMPCI is a quantitative evaluation of the overall development level of China's maritime power construction over a certain period of time. The CMPCI in this article aims to comprehensively reflect the changes in the construction of China's maritime power, strives to cover various fields it encompasses. This study focuses on objective statistical data analysis, supplemented by multisource data, to objectively and fairly measure the level of CMPCI.FindingsOriginality/valueIt fully reflects the highlights of marine science and technology, social democracy and strategic emerging industries. This research dynamically quantifies the trajectory of China's maritime power construction, synthetic reflecting the country's macroeconomic policy guiding function. Guiding the transformation of the marine resources utilization, marine economy development, marine scientific research and marine rights and interests maintenance and effectively serving the decision-making needs of the government.