Regional Studies in Marine Science最新文献

{"title":"Interannual variability in the distribution and biomass of five demersal fish species from shrimp bycatch and their relationship with environment in the Gulf of California","authors":"Jesús Leobardo Pérez-Burgos ,&nbsp;Juana López-Martínez ,&nbsp;Carlos Hiram Rábago-Quiroz ,&nbsp;Raúl Octavio Martínez-Rincón ,&nbsp;Ricardo García-Morales ,&nbsp;Emigdio Marín-Enríquez","doi":"10.1016/j.rsma.2025.104245","DOIUrl":"10.1016/j.rsma.2025.104245","url":null,"abstract":"<div><div>In the Gulf of California (GC), five fish species —<em>Balistes polylepis</em>, <em>Paralabrax maculatofasciatus</em>, <em>Sphoeroides annulatus</em>, <em>Haemulopsis elongatus</em>, and <em>Diapterus brevirostris</em>— are caught as bycatch in the industrial shrimp trawl fisheries. This study analyzed their distribution using the positive hauls from prospecting cruises, biomass through the swept area method, and environmental influences using multivariate methods from 2002 to 2018. The estimated absolute abundance was 52,181,219 individual organisms, with a total biomass of 4394.5 tons. The highest values were recorded in 2011, contributing more than 46 % of the total abundance and 54 % of the biomass, while the lowest values were observed in 2008 and 2018. <em>H. elongatus</em> (33 %) and <em>D. brevirostris</em> (25 %) were the most abundant species, whereas <em>B. polylepis</em> (41 %) and <em>H. elongatus</em> (22 %) dominated the biomass. According to our zoning of the GC, the North (N) zone contributed more than 50 % of the total abundance and biomass, followed by the Central (C) zone in the early years, with an increasing contribution from the South (S) and Southeast (SE) zones after 2015. Bathymetrically, the biomass in the SE and S zones was concentrated in the &lt; 20 m stratum, while the &gt; 40 m strata were relevant only in the N and S zones. <em>H. elongatus</em> and <em>D. brevirostris</em> exhibited a northward expansion, evidencing shifts in their geographic distribution. The PERMANOVA analysis indicated significant differences in biomass across years (F = 1.82, p = 0.00011) and zones (F = 1.95, p = 0.00141), but not across depth strata (p = 0.1971). Non-metric multidimensional scaling revealed temporal and spatial groupings, particularly for 2011, 2016, and 2005. Principal Component Analysis (PCA) explained 61.6 % of the variability, associating <em>H. elongatus</em> with the N zone and 2011, and <em>D. brevirostris</em> with the SE zone and 2016. Generalized Additive Models (GAMs) identified chlorophyll a (CHLA) and the Multivariate ENSO Index (MEI) as important environmental predictors of biomass variability in most species, explaining a significant portion of the deviance in their biomass patterns. These findings highlight the influence of environmental variability on biomass distribution, providing crucial insights for fisheries management in the GC region.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"87 ","pages":"Article 104245"},"PeriodicalIF":2.1,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution characteristics and influencing factors of chlorophyll a in the Pearl River Estuary and surrounding waters during spring and summer of 2023","authors":"You LE ,&nbsp;Yuanliang ZHAO ,&nbsp;Xianjie LIU ,&nbsp;Yang LU ,&nbsp;Jin-Yu Terence YANG ,&nbsp;Shuqun SONG ,&nbsp;Jun SUN","doi":"10.1016/j.rsma.2025.104241","DOIUrl":"10.1016/j.rsma.2025.104241","url":null,"abstract":"<div><div>This study undertook cruise surveys in May and August 2023 in the Pearl River Estuary and its surrounding waters (21°N-23°N, 112.5°E-114.5°E) to investigate the spatial distribution characteristics of size-fractionated phytoplankton chlorophyll <em>a</em> (Chl <em>a</em>) and its environmental influencing factors. The distribution of Chl <em>a</em> in this region showed pronounced seasonal variations and spatial differences. The total Chl <em>a</em> concentration in summer was considerably higher than that in spring. In spring, pico-sized Chl <em>a</em> (55.66 %) was the main contributor to total Chl <em>a</em>, whereas in summer, the contribution ratios among different size-fractionated Chl <em>a</em> were more balanced (micro-sized Chl <em>a</em>: 39.38 %; nano-sized Chl <em>a</em>: 26.34 %; pico-sized Chl <em>a</em>: 36.88 %). In both spring and summer, the distribution of total Chl <em>a</em> in the Lingdingyang area demonstrated an initial increase from the estuary to the open sea, followed by a decrease. In the surrounding waters of the PRE outside Lingdingyang, the total Chl <em>a</em> showed a gradual decrease from the nearshore to the offshore areas, with the contribution of pico-sized Chl <em>a</em> gradually increasing to dominance. The study found that in the Lingdingyang area, the high nitrogen-to-phosphorus ratio indicated a pronounced imbalance in nutrient proportions, suggesting a potential phosphorus limitation. Studying different size-fractionated Chl <em>a</em> can facilitate a better understanding of the dynamic distribution of phytoplankton of varying sizes, aiding in improved management of water quality in the PRE.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"87 ","pages":"Article 104241"},"PeriodicalIF":2.1,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the asymmetric distribution of Japanese eel recruitment to eastern and western Japan","authors":"Yu-Lin K. Chang ,&nbsp;Mari Kuroki","doi":"10.1016/j.rsma.2025.104243","DOIUrl":"10.1016/j.rsma.2025.104243","url":null,"abstract":"<div><div>The asymmetric distribution of Japanese eel recruitment to the Pacific-eastern and Sea of Japan-western coasts of Japan, was investigated by composite analysis based on a 30-year simulation using a three-dimensional particle-tracking ocean circulation model. Virtual larvae (v-larvae) were released northeast of Taiwan over 240 days in three experiments that were conducted to evaluate the effect of ocean currents, salinity orientation, and diel vertical migration (DVM). V-larvae exhibiting a salinity orientation and regular DVM accurately reproduced asymmetric recruitment to eastern and western Japan, in which the northernmost recruitment on the eastern and western coasts of Japan was at southern Hokkaido (43°N) and near the Noto Peninsula (∼37°N), respectively. The relatively southern location of the northernmost recruitment termination along the western coast of Japan was caused by southward currents and eddies in the subsurface layer of ∼300-m depths near the Noto Peninsula that impeded v-larvae from moving northward. The amount of v-larvae transported to the Sea of Japan (&lt;30 %) was less than that transported to the western Pacific (&gt;70 %), and v-larvae recruitment required more than a month longer to reach the same latitude in the Sea of Japan compared to the western Pacific. The Tsushima Warm Current that entered the Sea of Japan was weaker than the Kuroshio that flowed along the southeastern coast of Japan, which was responsible for the asymmetry in the amount of v-larvae recruitment and transport duration between eastern and western Japan. Other biological strategies, such as the timing of recruitment after metamorphosis, may also contribute to asymmetric Japanese eel recruitment in real oceans.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"87 ","pages":"Article 104243"},"PeriodicalIF":2.1,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mellow Yellow: Exploring yellow soft coral dominance at Ama Beach, Kerama Shotō National Park, southern Japan","authors":"Fabian Gösser ,&nbsp;Agus Alim Hakim ,&nbsp;Jue Alef A. Lalas ,&nbsp;Mattia Clavenna ,&nbsp;Maria Paz Medina Monroy ,&nbsp;Ulla von Ammon ,&nbsp;Rickdane Gomez ,&nbsp;James Davis Reimer","doi":"10.1016/j.rsma.2025.104236","DOIUrl":"10.1016/j.rsma.2025.104236","url":null,"abstract":"<div><div>In recent years, shifts in coral reef benthic community structure have become increasingly apparent, with reports of large monospecific patches of benthic invertebrates - often referred to as <em>barrens</em> - occurring at higher frequencies. In this study we investigated a previously unreported monospecific patch of the soft coral <em>Caementabunda simplex</em> at Ama Beach in Zamami-jima, Kerama Shotō National Park, Okinawa, Japan. A survey of this patch was conducted in November 2024, which shows that 45.0 % of benthos was <em>C. simplex</em>, with coverage as high as 63.1 % in some areas. DNA barcoding using the mitochondrial MutS-like protein (MutS) gene region confirmed the species identity, making it the northernmost record of <em>C. simplex</em> in its known distribution. Other components of the benthic community structure were characterized by high cover of coral rubble (40.4 %) and low live stony coral cover (3.4 %), likely indicative of prior disturbances such as coral bleaching or typhoons. Video transects and analysis of the associated fish community showed the presence of diverse functional groups, though corallivores were notably absent, likely due to the low hard coral cover. The presence of <em>C. simplex</em> may be linked to tropicalization or invasive tendencies, as observed for other xeniid octocorals in disturbed environments. This study raises ecological questions about the drivers of such monospecific patches within protected areas and highlights the need for further monitoring to understand their long-term impacts on reef ecosystem functioning and biodiversity. The findings underscore the importance of assessing soft coral dynamics in tropicalizing reefs to predict shifts in community structure under future environmental change.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"88 ","pages":"Article 104236"},"PeriodicalIF":2.1,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Differential response mechanisms of kelp aquaculture in Rongcheng and Changdao, Shandong Province, to abnormal coastal currents in autumn 2021","authors":"Wenjian Li ,&nbsp;Zhenyan Wang ,&nbsp;Xiangyang Xue ,&nbsp;Jie Sun","doi":"10.1016/j.rsma.2025.104235","DOIUrl":"10.1016/j.rsma.2025.104235","url":null,"abstract":"<div><div>In the autumn of 2021, an unprecedented kelp mortality event occurred in the Rongcheng kelp aquaculture area of Shandong Province, China, triggered by the invasion of an anomalous North Shandong Coastal Current (NSCC) following an extreme inland rainfall and subsequent environmental anomalies. In contrast, the Changdao kelp aquaculture area, located near the northern coast of the Shandong Peninsula, did not experience such mortality. The reasons behind this differential response remain unclear. In this study, we utilized remote sensing satellite images and open-access datasets to analyze the differential responses and environmental driving mechanisms of the Rongcheng and Changdao kelp aquaculture areas to the coastal current invasion. The results indicate that the severe kelp mortality event in Rongcheng during autumn 2021 did not impact the Changdao kelp aquaculture area because the Northern Five Islands (NFIs), the primary kelp-producing region, were not exposed to the anomalous coastal waters characterized by low suspended sediment concentration (SSC) and high chl-a levels. The anomalous intrusion of the NSCC in November 2021, driven by a sea surface height difference and eastward wind stress established by an autumn Yellow River flood and exacerbated winter northwesterly winds, accounted for the significantly low SSC and high chl-a concentrations in Rongcheng. Conversely, the NFIs in Changdao remained outside the impact zone of this anomalous NSCC. The long-term analysis also confirmed that the NFIs were typically unaffected by the NSCC, with synoptic-scale variations in SSC primarily governed by sediment resuspension due to wind waves. This study reveals the contrasting impacts of climate change on adjacent coastal ecosystems and aquaculture industries, highlighting the necessity for focused assessments and tailored adaptive strategies that consider specific environmental contexts to effectively mitigate climate-induced impacts.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"87 ","pages":"Article 104235"},"PeriodicalIF":2.1,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of the interaction of surge, wave, and tide on the surge and wave on the northern coast of Vietnam for a marine storm surge and wave forecast system","authors":"Pham Van Tien ,&nbsp;Nguyen Ba Thuy ,&nbsp;Sooyoul Kim ,&nbsp;Nguyen Kim Cuong ,&nbsp;Pham Khanh Ngoc ,&nbsp;Mai Van Khiem ,&nbsp;Lars Robert Hole","doi":"10.1016/j.rsma.2025.104234","DOIUrl":"10.1016/j.rsma.2025.104234","url":null,"abstract":"<div><div>The present study highlights the importance of the interaction of storm surges, waves, and tides in predicting surge and wave height in the operation of an early warning system on the northern coast of Vietnam through a series of numerical experiments amplifying typhoon intensity. First, the coupled model of surge and wave was validated by simulating the surge and wave of Typhoon Doksuri (2017). Then, we carried out a series of numerical experiments using the nine idealized typhoons, varying the drop rate of central pressures but keeping other parameters of the typhoon’s track, moving speed, and size. The results show that the storm surge becomes higher on the neap tidal condition, while it becomes lower on the spring tide. The storm wave gets higher on the spring tide. However, the behavior of the differences in the peak wave heights on the three tidal conditions is also similar to the storm surge. The tidal condition is highly distinguished in the heights of storm surges and waves under severe and super typhoons. The wave impact on the surge level and wave, considering the wave-dependent drag and the wave-induced radiation stress, amplifies the surge and wave heights as the typhoon intensity increases. In the neap tidal condition, the wave impact amplified the peak surge level to 1.4 m (32.7 %) along the super typhoon track compared to excluding it. In addition, the storm surge effect enlarges as the typhoon intensity increases, amplifying the wave height to 0.95 m (24.4 %) along the typhoon track on the spring tidal condition.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"87 ","pages":"Article 104234"},"PeriodicalIF":2.1,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144089065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Population dynamics of the deep-water rose shrimp Parapenaeus longirostris (Lucas, 1846) in Antalya Bay (eastern Mediterranean Sea, southern Türkiye)","authors":"Coşkun Menderes Aydın ,&nbsp;Eyüp Mümtaz Tıraşın ,&nbsp;Aydın Ünlüoğlu ,&nbsp;İsmail Dal ,&nbsp;Sencer Akalın ,&nbsp;Merve Karakuş","doi":"10.1016/j.rsma.2025.104233","DOIUrl":"10.1016/j.rsma.2025.104233","url":null,"abstract":"<div><div>This study presents the first comprehensive analysis of the deep-water rose shrimp <em>Parapenaeus longirostris</em> in Antalya Bay, focusing on its growth, mortality, reproductive biology, and stock status. 5295 individuals were collected during monthly surveys from July 2016 to June 2017, using the International Bottom Trawl Survey in the Mediterranean (MEDITS) protocol for the first time in Turkish waters. Average abundance and biomass indices were 4538 individuals/km² and 21.25 kg/km², respectively. Carapace lengths (<em>CL</em>) ranged from 6.95 to 33.20 mm for females and 9.14 to 27.18 mm for males. Seasonalized von Bertalanffy growth parameters were estimated as <em>CL</em>_∞ = 36.16 mm, <em>K</em> = 0.52 year⁻¹, <em>t</em>_{<em>anchor</em>} = 0.42 years, <em>C</em> = 0.76 and <em>t</em>_<em>s</em> = 0.61 years for females, and <em>CL</em>_∞ = 30.68 mm, <em>K</em> = 0.83 year⁻¹, <em>t</em>_{<em>anchor</em>} = 0.29 years, <em>C</em> = 0.99 and <em>t</em>_<em>s</em> = 0.25 years for males. Females exhibited slower growth but attained a larger <em>CL</em>_∞. Females reached first sexual maturity at a <em>CL</em> of 18.46 mm, compared to 16.82 mm for males. Spawning occurred bimodally, peaking in April–August and November–January. Total annual mortality was 2.13 for females and 3.59 for males, with fishing mortality (<em>F</em>) at 1.04 and 2.14, respectively. Exploitation rates were 0.49 for females and 0.60 for males, indicating overexploitation. Yield-per-recruit and spawning potential ratio analysis confirmed overexploitation, with current <em>F</em> reducing spawning stock biomass to 24 % of its unexploited level. Management recommendations include a 40 % reduction in fishing effort, extended seasonal closures, and square mesh codends to protect juveniles and ensure sustainability.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"87 ","pages":"Article 104233"},"PeriodicalIF":2.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Camera trap monitoring of the haul-out behavior of Mediterranean monk seals on Gökçeada Island in the North Aegean Sea","authors":"Ayhan Dede ,&nbsp;Arda M. Tonay ,&nbsp;Onur Gönülal ,&nbsp;Sedat Ozan Güreşen ,&nbsp;Bayram Öztürk","doi":"10.1016/j.rsma.2025.104224","DOIUrl":"10.1016/j.rsma.2025.104224","url":null,"abstract":"<div><div>Gökçeada Island, on the northern Aegean Sea coast of Türkiye, is an important habitat for endangered Mediterranean monk seals (<em>Monachus monachus</em>), where their presence has long been known. This is the first study to document the number, individual identity (sex and age), seasonal distribution, and habitat use (duration and time of haul-out) of these seals. One cave and one beach site on the northwest coast of Gökçeada Island were monitored using camera traps from 2017 to 2019 (777 days). Seals were photographed at 5-minute intervals for 177 days at the cave site and 64 days at the beach site. Seals’ diel patterns varied by month, with reduced activity during daytime at both sites. Eight seals (one adult male, five adult females, one young female, and one newborn) were documented using the sites. Five individuals were detected gregariously in the cave. A female was observed nursing a newborn in the cave in October 2017. One seal remained in the cave for more than 5 days without interruption. This study shows that the northwest coast of Gökçeada Island is year-round habitat and a breeding area for Mediterranean monk seals. Additional monitoring on neighboring islands is necessary to better understand the population size, distribution, habitat use, and haul-out behavior in the North Aegean Sea, so that this endangered species may be better protected for potential recovery.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"87 ","pages":"Article 104224"},"PeriodicalIF":2.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review of ship navigational safety in the Arctic Northwest passage","authors":"PAN Jiacai,&nbsp;LU Mengjie,&nbsp;MA Feng","doi":"10.1016/j.rsma.2025.104229","DOIUrl":"10.1016/j.rsma.2025.104229","url":null,"abstract":"<div><div>In recent years, as the Arctic sea ice continues to melt and gradually shrink, the navigable window of the Arctic Northwest Passage is expanding, leading to an increase in shipping activity. The navigational environment of the Northwest Passage is becoming more complex. In order to systematically sort out the research progress and gaps in the field of navigational safety in the Northwest Passage, this paper reviews the academic literature published in recent years, and analyzes the research progress of ship navigational safety in the Northwest Passage, mainly from three aspects: navigability based on ice conditions, ship navigation risk and route planning. The research objectives, methods, and conclusions of the representative literatures are reviewed. The results show that the existing research on models of navigability, navigation risk and route planning considered limited influencing factors and ice data, which cannot meet the challenges of increasing shipping activities. Accordingly, the research perspectives for the Northwest Passage are proposed. The results of this review suggest that models of navigability, navigation risk and route planning with the real-time and high-dimensional ice, meteorological and hydrological data are crucial to conduct meaningful and scientific research for navigational safety in the Northwest Passage.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"87 ","pages":"Article 104229"},"PeriodicalIF":2.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regional Disparities and Dynamic Evolution of Marine Science and Technology Innovation in China","authors":"Binhui Li ,&nbsp;Xinyao Jiang ,&nbsp;Kehan Xiang ,&nbsp;Yue Hu","doi":"10.1016/j.rsma.2025.104213","DOIUrl":"10.1016/j.rsma.2025.104213","url":null,"abstract":"<div><div>The present study addresses two critical gaps in coastal innovation system research: (1) the absence of integrated frameworks for evaluating spatiotemporal efficiency and (2) the lack of empirical analyses on the factors contributing to interregional knowledge disparities in marine science and technology. While prior studies primarily focus on determinants of innovation efficiency, they often neglect regional heterogeneity and the evolutionary dynamics of technological advancement. Additionally, the commonly used two-stage DEA method fails to account for environmental influences and statistical noise, introducing potential biases. To enhance analytical accuracy, a three-stage bootstrap-corrected DEA model incorporating environmental controls was employed. Using panel data from 11 Chinese coastal provinces and municipalities spanning 2009–2020, spatial stratification patterns were quantified through Dagum Gini decomposition and innovation clustering dynamics were examined via geospatial autoregressive models (ArcGIS 10.8.1). The present research represents the first integration of spatial econometrics with efficiency decomposition in the domain of marine technology. The findings indicate that while marine innovation efficiency in China remains suboptimal, it exhibits a trajectory of progressive improvement, with eastern coastal regions demonstrating superior performance. The observed spatial disparities follow an “east-strong, south-weak” distribution, highlighting the necessity for region-specific policy interventions. Further, standard deviation ellipse analysis corroborates a persistent south-north distribution of innovation productivity, with Jiangsu Province serving as the gravitational center. The present study provides a replicable framework for monitoring and optimizing maritime innovation ecosystems in developing economies, offering valuable insights for policymakers to mitigate spatial stratification and improve knowledge spillovers.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"87 ","pages":"Article 104213"},"PeriodicalIF":2.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}