Progress in Oceanography最新文献

{"title":"Temporal variability of bottom hypoxia in open and semi-enclosed coastal areas in an upwelling region","authors":"Richard Muñoz ,&nbsp;Fabián J. Tapia ,&nbsp;Marcus Sobarzo","doi":"10.1016/j.pocean.2025.103435","DOIUrl":"10.1016/j.pocean.2025.103435","url":null,"abstract":"<div><div>Hypoxia events driven by the onshore advection of oxygen-poor upwelling waters have become increasingly common along Eastern Boundary Upwelling Systems (EBUS). More frequent or intense drops in nearshore oxygen concentrations can impact the behavior, population dynamics, and geographic distribution of many coastal species. To better understand these effects, it is necessary to determine the periodicity of hypoxia in the inner shelf, its response to upwelling-favorable winds, and the local factors that may modify its intensity and duration. Here, we used a two-year record (March 2017–February 2019) of near-bottom dissolved oxygen (DO) and water temperature from seven sites spanning 260 km of the upwelling coast of Central Chile to characterize the local variability in oxygen concentration and its association with coastal winds. The temporal patterns observed in the inner shelf were compared with 13.5 years of monthly hydrographic profiles (2002–2015) from a mid-shelf station located ca. 30 km offshore. The spatial structure of nearshore hypoxia was inferred from hydrographic data gathered during two surveys conducted in winter 2018 and late summer 2019. Inner-shelf hypoxia (DO<span><math><mo>&lt;</mo></math></span>2.0 mg/L) occurred predominantly in the austral summer and exhibited substantial among-site differences in its persistence and timing relative to wind-driven upwelling. The mean duration of summertime hypoxia events ranged between 1 and 9 days, except for a site at the innermost section of the Gulf of Arauco, where events could be as long as 62 days. Hypoxic waters appeared at the inner shelf after 1–2 days of sustained upwelling-favorable winds (59% of the hypoxia events occurred after <span><math><mo>≤</mo></math></span> 2 days of persistent wind). The seasonality and vertical structure of hypoxia were apparent in the mid-shelf monthly time series, with the hypoxic layer’s upper limit ascending to 20–30 m depths during spring-summer (October–March) and receding to 45–60 m in autumn-winter (May–September). Hydrographic properties of the hypoxic layer pointed to Equatorial Subsurface Water (ESSW) as the source water mass for mid-shelf hypoxia throughout the year. These properties were consistent with those observed on the inner shelf. Among the seven inner-shelf sites, Arauco showed the most persistent (70% of the time spanned by our records) and severe hypoxia, with DO levels below those observed at the mid-shelf during active upwelling. We hypothesize that these conditions respond to a combination of physical phenomena and coastal eutrophication that locally enhance thermal stratification, productivity, and benthic oxygen consumption, thus amplifying the severity of hypoxia and physiological stress for marine organisms inside the Gulf of Arauco.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"233 ","pages":"Article 103435"},"PeriodicalIF":3.8,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strengthened double-diffusive convection induced by the combined effect of tropical cyclones and a mesoscale eddy","authors":"Yanwei Zhang ,&nbsp;Weihan Ruan ,&nbsp;Danni Lyu ,&nbsp;Jiancheng Yu","doi":"10.1016/j.pocean.2025.103438","DOIUrl":"10.1016/j.pocean.2025.103438","url":null,"abstract":"<div><div>Double-diffusive convection (DDC) is a critical driving mechanism for diapycnal mixing in the ocean. However, there is limited quantitative investigation on the impacts of dynamic ocean-atmospheric processes, such as the interaction between tropical cyclones and mesoscale eddies, on DDC generation. In this study, we analyzed the cyclone-eddy induced DDC based on measurements obtained by an underwater glider in the northern South China Sea, where is frequently impacted by tropical cyclones and eddies. We observed abnormally increased salinity and a notable upwelling resulting from cyclone-eddy interaction. Our observations further reveal the coexistence of detached salt fingers (SF) and shear-driven turbulence. Strengthened salt finger dominates DDC with SF-driven salinity diapycnal diffusivity (10⁻⁴ m² s⁻¹) in the deepened halocline, which is an order of magnitude higher than background values. Shear-driven turbulence, characterized by large density overturns below 600 m, is generated due to enhanced geostrophic shear around the eddy. Further investigation indicates that SF thermohaline staircases evolve from lateral saline fronts driven by Ekman-pumping-induced upwelling and Kuroshio intrusion. The convective structure generates strong diapycnal mixing and vertical/lateral salinity fluxes that are urgently needed to be incorporated into estimations of ocean energy/material balance and ocean modeling.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"232 ","pages":"Article 103438"},"PeriodicalIF":3.8,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nutricline heaving regulates carbon export in the South China Sea","authors":"Chuanjun Du ,&nbsp;Minhan Dai ,&nbsp;Ying He ,&nbsp;Kuanbo Zhou ,&nbsp;Shuh-Ji Kao","doi":"10.1016/j.pocean.2025.103437","DOIUrl":"10.1016/j.pocean.2025.103437","url":null,"abstract":"<div><div>The export of phytoplankton-synthesized particulate organic carbon (POC) from the upper ocean to the depth removes CO₂ from the atmosphere, playing a critical role in the global climate system. However, substantial data and knowledge gaps in the spatial and temporal variability of the POC export hamper a full spectrum of understanding to the controls of POC export at both seasonal and basin scales. Here, we developed an optimized one-dimensional biogeochemical model, which well simulates the seasonal variations of biogeochemical parameters at the South-East Asia Time-series Study station in the South China Sea (SCS). Applying this model, we further examined the climatology of POC fluxes in the SCS using a high-quality nutrient dataset derived from an algorithm based on a relationship between field observed nutrients and temperature/salinity with high spatiotemporal coverage. The POC fluxes at 100 m deep range from 0.24 to 12.7 mmol C m⁻² d⁻¹ and exhibit evident spatial and seasonal variations. During the summer (from June to August), the POC fluxes in the northern and northwestern SCS regions are higher compared to the central and southern SCS regions. In winter (from December to February), the POC fluxes in the northern SCS are significantly enhanced. Overall, the northern and western basins exhibit higher POC fluxes compared to the central and southeastern basins in all four seasons. Seasonally, the basin averaged POC fluxes in spring and winter exhibit higher values than that in summer and fall. At the relatively eutrophic regions where surface nitrate (NO₃⁻) concentrations &gt; 0.1 μmol L⁻¹, the surface NO₃⁻ concentrations are the primary factor influencing the distribution of POC fluxes, particularly in winter and in the northern SCS. In contrast, within the vast oligotrophic environment, the subsurface nutricline heaving driven by upwelling/downwelling induced by horizontal convergences/divergences at both meso- and basin scales, plays a pivotal role in determining the distribution of POC fluxes. Our findings underscore the significance of subsurface nutricline heaving in driving carbon export in the oligotrophic ocean.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"232 ","pages":"Article 103437"},"PeriodicalIF":3.8,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Labrador Current cold front shaping the Atlantic salmon homing migration routes from the waters off Southern Greenland to eastern North America","authors":"Christiane Dufresne ,&nbsp;Diane Lavoie ,&nbsp;Martha Robertson ,&nbsp;Julien April ,&nbsp;Chantelle Burke ,&nbsp;Jon Carr ,&nbsp;Joël Chassé ,&nbsp;Frédéric Cyr ,&nbsp;Jason Daniels ,&nbsp;Levi Denny ,&nbsp;Shelley Denny ,&nbsp;Guoqi Han ,&nbsp;Ian Jonsen ,&nbsp;Timothy F. Sheehan ,&nbsp;John Fredrik Strøm ,&nbsp;Marc Trudel ,&nbsp;Frederick Whoriskey","doi":"10.1016/j.pocean.2025.103439","DOIUrl":"10.1016/j.pocean.2025.103439","url":null,"abstract":"<div><div>Atlantic salmon (<em>Salmo salar</em>) experienced drastic population declines from the mid-1970 s to the early 1990′s throughout their range. The survival of the salmon while at sea is considered as the main driver of these declines, even though the underlying mechanisms are poorly understood. This study aims at improving the general understanding of the ocean distribution and migration timing of sub-adult salmon returning to North America from the waters off southern Greenland that could help determine the drivers of marine mortality. We used animal biotelemetry and numerical modeling to improve our knowledge of Atlantic salmon migratory behavior. We used data from 43 North American Atlantic salmon tagged at West Greenland, of which 5 individuals migrated towards their native rivers, and developed an individual-based model to simulate homing migration from their feeding grounds in South Greenland towards the coastal areas of their native rivers. The tagged and simulated salmon exhibited similar behavior when they encountered the cold water front formed by the southward flowing Labrador Current. The salmon either crossed the Labrador Current near the Newfoundland shelf break or continued their route southward along the warmer side of the cold front. These two pathways emerged as the migration routes split where the shelf slope is less steep. This discontinuity along the shelf break leads to a highly dynamic region, a high sea surface temperature variability, and occasional breaches in the thermal front that favor on-shelf fish migration. The salmon trajectories appear to be deflected when the front temperature is 1 °C or less. The 1 °C isotherm would thus bound the thermal distribution of North American Atlantic salmon and shape the species migration routes.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"233 ","pages":"Article 103439"},"PeriodicalIF":3.8,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First characterization of upper mesophotic coral assemblages in Santo Antão (Cabo Verde, East Atlantic Ocean): Demographic and community approaches provide baseline ecological data","authors":"Daniel Gómez-Gras ,&nbsp;Núria Viladrich ,&nbsp;Andrea Gori ,&nbsp;Jean-Baptiste Ledoux ,&nbsp;Paula Jiménez ,&nbsp;Teresa Amaro ,&nbsp;Cristina Linares","doi":"10.1016/j.pocean.2025.103432","DOIUrl":"10.1016/j.pocean.2025.103432","url":null,"abstract":"<div><div>Preserving healthy marine ecosystems is crucial for human societies, especially in resource-dependent locations like Santo Antão, the most northwestern island of Cabo Verde (East Atlantic Ocean). However, effective conservation requires baseline ecological knowledge on target ecosystems, which is often lacking. This study provides the first ecological characterization of upper mesophotic coral assemblages (i.e., at depths of 30–40 m) in Santo Antão. We focused on density, size structure, and conservation status of canopy-forming coral species in two assemblages types: i) a mixed coral assemblage dominated by black corals (e.g., <em>Stichopathes luetkeni;</em> Brook, 1889<em>, Tanacetipathes spinescens;</em> Gray, 1857, or <em>Tanacetipathes wirtzi;</em> Opresko, 2001) and gorgonians (e.g., <em>Leptogorgia capverdensis;</em> Grasshoff, 1986, <em>Leptogorgia gaini;</em> Stiasny, 1940, <em>Eunicella granulata</em>; Grasshoff, 1992<em>,</em> or <em>Eunicella papillifera;</em> Milne Edwards &amp; Haime, 1857), and ii) monospecific black coral assemblages dominated by <em>Antipathella wollastoni</em> (Gray, 1857) and <em>T. spinescens</em>, respectively. Additionally, we used a trait-based approach to characterize the functional community structure of the mixed assemblage and quantified the abundance of its main morpho-functional groups. Our results show that these assemblages are structurally complex, functionally diverse, and well-preserved. Notably, they harbor some of the densest black coral populations reported to date, with mean densities exceeding 20 colonies/m² for some species. This suggest that the studied assemblages provide important ecosystem services to local communities, such as increasing fish biomass for artisanal fishing and enhancing aesthetic value for a sustainable diving tourism. However, further surveys at other sites are needed to assess the generalizability of these findings and support future conservation planning.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"232 ","pages":"Article 103432"},"PeriodicalIF":3.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatiotemporal variation in marine plankton communities driven by environmental changes in the East China sea","authors":"Chia-Ting Chen ,&nbsp;Pei-Chi Ho ,&nbsp;Fan-Sian Lin ,&nbsp;Esther Wong ,&nbsp;Fuh-Kwo Shiah ,&nbsp;Gwo-Ching Gong ,&nbsp;Chih-hao Hsieh","doi":"10.1016/j.pocean.2025.103434","DOIUrl":"10.1016/j.pocean.2025.103434","url":null,"abstract":"<div><div>Unicellular plankton are the foundation of marine food webs and biogeochemical cycles. This study analyzed long-term observations (2009–2021) of the taxonomic composition and size structure of nano- to microplankton in the East China Sea to assess the impact of environmental changes on these communities. Over the past decade, aloricate ciliate and chain-forming diatom abundances have declined, likely due to rising sea surface temperatures and decreasing concentrations of phosphate, nitrate, and silicate. Sea surface concentrations of these nutrients and dinoflagellate biomass were positively correlated with the Pacific Decadal Oscillation (PDO) index, while the diatom-to-dinoflagellate ratio decreased as the PDO index increased. These findings reveal the large-scale climatic drivers of nutrient dynamics and plankton composition. The normalized biomass size spectrum (NBSS) slope was shallower in areas with higher salinities, diatom and ciliate biomasses, and diatom-to-dinoflagellate ratios, and it was steeper in areas with higher nutrient concentrations. The NBSS slopes were steeper (i.e. more smaller organisms) during winters with high nutrient concentrations, likely due to reduced light availability from high turbidity and increased grazing pressure. The 2017 summer cruise identified three spatial clusters of plankton communities that were influenced by different water masses. Cluster 1, influenced by the China Coastal Current, was dominated by athecate dinoflagellates. Clusters 2 and 3, influenced by the Taiwan Warm Current and Kuroshio Current, respectively, were dominated by diatoms. This study highlights the importance of long-term monitoring and comprehensive analyses to better understand how plankton communities will respond to climate change and anthropogenic activity.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"232 ","pages":"Article 103434"},"PeriodicalIF":3.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pan-regional characterization of the variability in the Indonesian Seas","authors":"Yuan Wang,&nbsp;Huijie Xue","doi":"10.1016/j.pocean.2025.103436","DOIUrl":"10.1016/j.pocean.2025.103436","url":null,"abstract":"<div><div>The Indonesian Seas feature a wide spectrum of variations in hydrography and circulation. This study applies a simple frequency-based time series decomposition method on the 20-year (2000–2019) model simulation, revealing the spatial distribution of the variations in intra-seasonal, semi-annual, annual, and inter-annual bands, respectively. K-means clustering based on the decomposed variability is used to explore dynamical similarities and differences, highlighting the competing impacts of annual and inter-annual variations. The Indonesian Seas lie at a “crossroad” where the inter-annual variation dominates in a NE-SW-oriented deep-ocean regime, while the annual variation prevails in a NW-SE-oriented marginal sea regime. The latter is primarily driven by the local monsoonal winds. Moreover, annual current profiles reveal significant differences between the main and east branches of the Indonesian Throughflow (ITF), with annual variations being more prominent above (below) the thermocline in the main (east) branch. Overall, ITF variability is influenced by remote inter-annual factors, regional monsoonal forces, and local flow instabilities, with the semi-annual variations being minor but non-trivial.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"232 ","pages":"Article 103436"},"PeriodicalIF":3.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Field observations of internal waves triggered sediment movements at the northern South China Sea continental slope","authors":"Gaibo Zhao ,&nbsp;Changwei Bian ,&nbsp;Wensheng Jiang ,&nbsp;Tao Wang ,&nbsp;Xiaolei Liu ,&nbsp;Jiwei Tian ,&nbsp;Yonggang Jia","doi":"10.1016/j.pocean.2024.103412","DOIUrl":"10.1016/j.pocean.2024.103412","url":null,"abstract":"<div><div>Internal ocean waves, such as internal tides and internal solitary waves (ISWs), have strong horizontal and vertical velocities and play an important role in ocean energy and material exchange. Field observations indicated that internal waves had a significant effect on hydrodynamics and sediment transport on the continental shelf. However, there remained a lack of field observations on how internal waves affect sediment transport on continental slopes. In this study, a seabed observation system was set up on the continental slope of the South China Sea for 13 days, which measured the high spatiotemporal resolution velocity and mixing of the internal tides and ISWs and sediment movements in the bottom boundary layer. The results showed that the internal tides and ISWs caused strong flows of more than 0.20 m/s near the seabed of the slope, which was much higher than the local sub-inertial currents (0.03 m/s) and barotropic tides (0.03 m/s). The velocity enhancement caused by internal tides and ISWs increased the bottom shear stress from 0.01 to 0.08 Pa. When the internal tidal velocity increased, the suspended sediment concentration (SSC) increased substantially from 5 mg/L to more than 40 mg/L. When the strongest ISWs passed through the observation site, the SSC increased several times, reaching 19 mg/L. Both internal tides and ISWs agitated seabed sediment and transported it downwards along the slope with sediment transport flux of 0.26 × 10^-3 and 0.08 × 10^-3 kg m⁻² s⁻¹, respectively.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103412"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Observing ENSO-modulated tides from space","authors":"Haidong Pan ,&nbsp;Tengfei Xu ,&nbsp;Zexun Wei","doi":"10.1016/j.pocean.2024.103410","DOIUrl":"10.1016/j.pocean.2024.103410","url":null,"abstract":"<div><div>The understanding of sea level variability is fundamental for coastal communities with high population density. As important parts of sea levels, tides are often overlooked because they tend to be regarded as simple periodic oscillations by numerous studies. In fact, due to the interference of various non-astronomical factors, observed tides are non-stationary and display multi-time scale variability. Here, we focus on inter-annual tidal variations induced by El Niño-Southern Oscillation (ENSO) in the western Pacific. Although satellite altimeters have been widely used in tidal research, to date, inter-annual tidal changes from satellite altimeters are never reported. Classical harmonic analysis (CHA) model with moving windows is inappropriate for satellite altimeter records due to tidal aliasing originated from long-period sampling intervals. In this paper, we successfully quantify the influences of ENSO on tides from multi-satellite altimeters through a revised harmonic analysis (RHA) model which directly builds ENSO forcing into the basic functions of CHA. To eliminate mathematical artifacts caused by over-fitting, Lasso regularization is applied in the RHA model to replace widely-used ordinary least squares. The performances of RHA are generally better than those of CHA as a result of considering the impacts of ENSO. The combination of RHA and satellite altimeters extends the studies on tidal evolution using spatially limited tide gauges. Compared to diurnal tides, it is found that semi-diurnal tides are more vulnerable to ENSO in the western Pacific. Of note, both linear and non-linear tidal responses to ENSO show significant spatial heterogeneity. Moreover, as a universal method, ENSO index used in this study can be replaced by other factors such as river flow and sea waves to explore tidal evolution driven by other physical processes.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103410"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Community structure of fish larvae associated with advections of the Kuroshio and its neighboring waters","authors":"Toru Kobari ,&nbsp;Yusuke Manako ,&nbsp;Airi Hara ,&nbsp;Kaori Yamanoue ,&nbsp;Takafumi Azuma ,&nbsp;Ryuji Fukuda ,&nbsp;Yi-Chen Wang ,&nbsp;Masafumi Kodama ,&nbsp;Gen Kume","doi":"10.1016/j.pocean.2024.103386","DOIUrl":"10.1016/j.pocean.2024.103386","url":null,"abstract":"<div><div>The Kuroshio has been long thought to be disadvantageous as nursery grounds for larval fishes due to the low plankton standing stocks under the oligotrophic conditions. Despite of the potential risk for survival and growth, early life stages of various fishes appear abundantly in the Kuroshio and its neighboring waters. Here, we report what kind of taxonomic groups establish community structure of larval fishes in the Continental shelf waters (CW) and the Kuroshio (KW). 16 orders and 78 families were classified in the present study. Mesopelagic fishes more abundantly appeared in the KW than in the CW, while larval fish abundance was not different between the two areas. Multivariate analysis demonstrated the regional difference of the taxonomic compositions, represented by Callionymidae, Bothidae, Labridae and Bregmacerotidae for the CW and Gonostomatidae, Myctophidae and Notosudidae for the KW. Abundance of fish larvae to ambient salinity exhibited significantly positive correlations for Gonostomatidae, <em>Sigmops gracilis</em> and <em>Myctophum orientale</em> predominated in the KW and negative correlations for Labridae appeared abundantly in the CW. These results suggest that mixture of advected specimens from the coastal and Kuroshio waters also contribute to larval fish community with high biodiversity and comparable abundance between the Kuroshio and its neighboring waters.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103386"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}