This study examines suspended sediment transport affected by flocculation settling in a highly stratified tidal estuary. In situ observation recorded two estuarine front passages during strong‐ebb and flood‐slack tides, respectively. The strong‐ebb front enhanced turbulence, increasing sediment concentrations (~ 5 ppm), macrofloc size (~ 300 μm) and settling efficiency. The surface plume combined with

Rivers produce and decompose large amounts of carbon globally due, in part, to high rates of gross primary production (GPP) and ecosystem respiration (ER), collectively known as ecosystem metabolism. Water temperature is a major driver of ecosystem metabolism, and in‐stream temperatures are increasing globally, including extreme temperature events called heatwaves. This study used published estimates

In recent years, underwater object detection (UOD) has become a prominent research area in the computer vision community. However, existing UOD approaches are still vulnerable to underwater environments, which mainly include light scattering and color shifting. The blurring problem caused by water scattering on underwater images makes the high-frequency texture edge less obvious, affecting the detection

Due to the increasing trend in aquaculture and fisheries production, conventional feed resources, especially protein ingredients, are overburdened, and sometimes their price fluctuations limit quality feed formulations for farmers, thus leading to the exploration of alternative protein feed resources. Antarctic krill meal (AKM) has emerged as a potential candidate ingredient for sustainable and suitable

The greenfin horse-faced filefish, Thamnaconus septentrionalis, which is widely distributed in the Indo-West Pacific Ocean, is an important commercial fish species with characteristic blue-green fins, rough skin, and a spine-like first dorsal fin. Recently, T. septentrionalis has captured the attention of conservation and development due to its sharply declining population, and its great economic value

With its safe and efficient characteristics, container transportation has become vital for advancing the global economy. However, port congestion has become a significant obstacle to the container freight price system’s stability. There is currently no dependable engineering solution to guarantee the stability of the maritime transport system in a port congestion scenario. Therefore, decision-makers

Calcareous sand with fines content was often encountered in offshore and onshore engineering. However, most previous research has primarily focused on the mechanical properties of clean calcareous sand. This study conducted a series of drained and undrained triaxial tests on calcareous sand-clay binary mixtures to investigate the impact of fines content on the strength and deformation characteristics

Crab is a traditional Chinese culinary ingredient with significant cultural, archaeological, and artistic research value. As a prized aquatic product in China, it has become a cornerstone of the nation’s aquaculture industry. Throughout history, crab culture has evolved, developing distinct temporal characteristics and cultural connotations. However, controversies surrounding the cultural significance

IntroductionOver the past three decades, approximately 16% of the world’s tidal flats have been lost. In the Yellow River Delta (YRD), the reduction in sediment supply due to decreased Yellow River discharge has raised concerns regarding the morphological stability of tidal flats.MethodsTo investigate the response of tidal flat development to reduced sediment input, a novel physical model experiment

This study examines the effects of Free Trade Agreements (FTAs) on Pakistan’s seafood exports, specifically analyzing the China-Pakistan Free Trade Agreement (CP-FTA) and its stages, CP-FTAI and CP-FTAII. Using the gravity model (GM) of trade, it empirically analyzes the dynamics of seafood trade between Pakistan and its neighboring countries, aiming to provide insights into improving trade balance

Lake ice cover is declining globally with important implications for lake ecosystems. Ice loss studies often rely on small numbers of lakes with long‐term data. We analyzed variation and trends in ice cover phenology from 1213 lakes over 74 yr (1949–2022) in Minnesota (USA), during which ice cover duration declined at a rate of 2 d per decade (14 d total) and became more variable. Despite variation

Terrestrial run‐off is increasing in temperate lakes due to climate change and can lead to loading of colored dissolved organic matter (cDOM) and nutrients, thus reducing light availability and increasing carbon, nitrogen, and phosphorus. Run‐off events are highly irregular, resulting in temporal resource variability that may determine the energy flow in planktonic communities. To understand the effects

Dinitrogen (N2)‐fixing microorganisms play a crucial role in supplying nitrogen (N) to the oceans by converting atmospheric N2 into bioavailable N. N2 fixation was thought to be limited to warm oligotrophic ocean waters, but the association between the N2‐fixing UCYN‐A cyanobacterium and specific haptophytes, including Braarudosphaera bigelowii and relatives, has been found in diverse ocean environments

Mangrove ecosystems play a crucial role in coastal environments. However, due to the complexity of mangrove distribution and the similarity among different categories in remote sensing images, traditional image segmentation methods struggle to accurately identify mangrove regions. Deep learning techniques, particularly those based on CNNs and Transformers, have demonstrated significant progress in

Climate change requires managers to bolster long-term resilience of fisheries and concurrently improve short-term responsiveness of management systems to prevailing ecological conditions, all while avoiding unintended harm to stocks in a highly uncertain context. There has been substantial effort dedicated to developing the scientific information and tools needed to inform climate-ready fisheries,

The Kuroshio Current, a western boundary current in the North Pacific Ocean, is regarded as a hotspot of nitrogen fixation that drives marine primary productivity and biogeochemical cycles. However, this assumption is based on limited, spatiotemporally biased data. We curated nitrogen fixation data and applied a generalized additive model to revisit the distribution and total amount of nitrogen fixation

Diatom‐dominated blooms in coastal upwelling systems contribute disproportionately to global primary production. The fate of carbon captured during a diatom bloom is often influenced by species‐specific ecological differences. However, successional patterns that take place during a diatom bloom are often oversimplified, and the diversity of diatom adaptations to different stages of a bloom remains

IntroductionThis study focuses on the benthic macroalgae of the Nanji Islands, China, aiming to assess species diversity and biomass through a combination of qualitative and quantitative approaches using historical data.MethodsWe conducted a comprehensive survey of the benthic macroalgae, employing species identification and biomass estimation techniques across different seasons and tidal zones. Co-occurrence

Estuaries are typically net heterotrophic systems and a source of CO2 to the atmosphere, while continental shelves are net CO2 sinks. Yet, primary production and net ecosystem metabolism (NEM) are variable, and this has implications for nutrient and carbon processing along the land-sea interface. To resolve this variability, high-frequency dissolved oxygen and ancillary biogeochemical data from a research

This article presents the results of three experiments conducted in 2022–2023 using an Argo autonomous profiling float anchored to the seabed with a thin line. The aim of the study was to prevent the float from drifting in order to perform measurements in a precisely defined location. The experiments were carried out in the Baltic Sea - in Puck Bay and the vicinity of the Hel Peninsula. Puck Bay, a

Nitrate is a critical limiting nutrient that significantly influences marine primary productivity and carbon sequestration. However, three-dimensional observation and reconstruction of oceanic nitrate remain constrained by the scarcity of in-situ data and limited spatial coverage. To address the challenge of limited observational labels hindering the development of global deep learning models for marine

Echinoids are an integral part of present-day and ancient marine trophic webs, and they host a variety of mutualistic, commensalistic, and parasitic epibionts on their spines and test. Cidaroid echinoid (slate pencil urchins) spines in particular are commonly colonized by epizoans. Eucidaris in the western Atlantic and eastern Pacific today are notable for the frequency and intensity of calcifying

Fossil fish teeth are important carriers of rare earth elements (REEs) in deep-sea sediments. Meanwhile, 87Sr/86Sr-143Nd/144Nd in these fossils have been widely used in paleoceanography. However, when and how REEs enter the fish teeth remains ambiguous, which hinders elucidating the enrichment mechanism of REEs in deep-sea sediments, and the effectiveness of 87Sr/86Sr-143Nd/144Nd in paleoceanography

Heavy metal pollution presents a significant concern in marine ecosystems, posing a serious threat. Monitoring the levels of heavy metals in marine fish is crucial for safeguarding human health. This study specifically investigates the bioaccumulation of eight elements (arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), selenium (Se), and zinc (Zn)) in marine fish in the

Expanded polystyrene (EPS) has caused significant pollution in marine environments, with potential EPS-degrading bacteria identified on long-term floating EPS biofilms. However, studies on bacterial interactions and consortium reconstruction based on in-situ bacterial diversity remain limited. Marine EPS wastes of different sizes were collected from subtropical coast of Xiamen island, and subjected

IntroductionThis research aims to empirically investigate the dual effects of establishing the Marine Economic Development Pilot Zone (MEDPZ) on marine economic growth and environmental governance. The study focuses on China’s coastal provinces, where MEDPZs have been implemented, to assess their impacts on both economic and environmental aspects.MethodsThe study employs a Time-varying difference-in-differences

IntroductionThe discharge of nuclear wastewater (NW) poses significant environmental, economic, and geopolitical risks, impacting marine ecosystems, global fisheries trade, and public health. Japan's decision to release NW has triggered international responses, including seafood import restrictions and inspections.MethodsThis study simulates the short-term (ST) and long-term (LT) effects of NW on global

Bottlenose dolphins (Tursiops truncatus) often have served as sentinel species for ecological changes in estuarine and marine systems. In 2013, the population of bottlenose dolphins in the Indian River Lagoon exemplified this role because an unusual mortality event involving malnourishment followed ecological changes. Potential causes of mortalities were investigated using surveys of key habitats and

Biogeochemical mineralization is increasingly recognized as a significant factor in the formation of submarine hydrothermal sulfide deposits. While several mechanisms by which hydrothermal organisms may facilitate metal deposition have been documented in many seafloor hydrothermal deposits, the potential involvement of biogenic processes in the mineralization of hydrothermal deposits in the southern

Macroalgae are important primary producers in the coastal ocean, and they release a large fraction of their net primary production as dissolved organic carbon (DOC). It is assumed that much of this DOC is recalcitrant and results in the sequestration of large amounts of carbon. We lack sufficient knowledge about the bioavailability of this material and the role of other sinks such as photooxidation

We resolve mangrove nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2) vertical exchange with the atmosphere and lateral exchange with the ocean. Our new observations in Brazil were combined with literature data to reassess the overall mangrove carbon sequestration potential. The pristine mangrove creek was a source of CO2 and CH4, and a sink for N2O. The CO2‐equivalent N2O uptake offset

Corals with high trophic plasticity, i.e., the ability to change the relative contribution of heterotrophic and autotrophic nutrition to their mixotrophic diet, can have increased tolerance to individual stressors, but it is poorly understood how trophic strategies shift in response to combined global (e.g., warming, acidification) and local stressors (e.g., nutrient input). Furthermore, it remains

Coastal waters play a pivotal role in the global carbon cycle, showing increased short‐term variability of dissolved oxygen saturation (DOsat) and partial pressure of greenhouse gases like carbon dioxide (pCO2), especially in underrepresented tropical eutrophic environments. Here, we conducted high‐frequency (1‐min interval) diel measurements of surface DOsat and pCO2 in Guanabara Bay, Brazil, a highly

Algae-derived organic nitrogen (AON) is mineralized by microorganisms to bioavailable inorganic nitrogen form, potentially sustaining the harmful algal blooms (HABs) for extended durations. The modified clay (MC) is an effective approach for mitigating HABs; however, its effects on the AON mineralization and the underlying mechanism remain unclear. In this study, the effects of MC on the mineralization

IntroductionMercury (Hg) and its organic forms can accumulate in marine organisms, undergoing biomagnification as they transfer through food chains. However, the factors affecting such Hg biomagnification are not fully understood.MethodsThis study analyzed the biomagnification of total mercury (THg) and methylmercury (MeHg) in marine food chains represented by invertebrates and fish from the offshore

Coastal resilience has become a pressing global issue due to the growing vulnerability of coastlines to the effects of climate change. Nature-based solutions have emerged as a promising approach to coastal protection to not only enhance coastal resilience, but also restore critical ecosystems. Coral reef restoration has the potential to provide ecosystem services benefits; however, there are still

Xisha sea area features rough bathymetry and complex hydrological environment, acting as an important baroclinic source and sink in the northwestern South China Sea. To investigate the impacts of Xisha topography on the local generation of internal solitary waves (ISWs) and on the propagation of the far-field ISWs, an idealized 2D non-hydrostatic model ORCTM with a very-high resolution was employed

Underwater images captured by Remotely Operated Vehicles are critical for marine research, ocean engineering, and national defense, but challenges such as blurriness and color distortion necessitate advanced enhancement techniques. To address these issues, this paper presents the CUG-UIEF algorithm, an underwater image enhancement framework leveraging edge feature attention fusion. The method comprises

Understanding the spatial ecology of sea turtles is essential to ensure their long-term conservation by the preservation of their environment. The distribution and environmental preferences for egg-laying by the green turtle (Chelonia mydas) were studied on Grande Saziley beach in Mayotte (north of the Mozambique Channel). Green turtle nesting activity was geolocated during night patrols and the depth

Coastal foundation species such as kelps, corals, and seagrasses play vital roles in supporting marine biodiversity and ecosystem services globally, but are increasingly threatened by climate change. In particular, kelp forests are highly dynamic ecosystems experiencing natural fluctuations across seasons and climate cycles, e.g., El Niño Southern Oscillation, Pacific Decadal Oscillation. As climate

IntroductionBiofloc technology (BFT) offers a sustainable approach to aquaculture by enhancing water quality and nutrient utilization. This study investigated the effects of varying carbon-to-nitrogen ratios, achieved through different combinations of jaggery and corn flour, rice flour, or rice bran, on the growth performance, body composition, histological health, and immune response of common carp

IntroductionFungal communities have only been studied in a small portion of the vast variety of habitats that exist in deepsea environments, and studies aimed at understanding fungal diversity and function are minimal.ObjectiveThe aim of this study is to explore both the fungal diversity in deepsea sediments and the enzymatic activities present in them, which are related to the ecological roles of

The 234Th–238U pair technique is widely used in estimating particulate organic carbon (POC) flux, typically with a steady-state (SS) assumption. There is often a temporal bias between the SS-derived and actual POC fluxes caused by neglecting the temporal change in 234Th. However, this temporal bias has not been fully investigated due to the lack of continuous sampling of 234Th profiles and sediment

Understanding the mechanisms driving ontogenetic niche shifts in fishes has predominantly focused on dietary changes in large predatory migrants. This study investigates trophic niche dynamics in a small, pelagic migratory fish, the Japanese anchovy (Engraulis japonicus). By mapping migratory paths across varied oceanographic regions on a temperate continental shelf of Korean waters, we quantified

The paper concentrates on the east Adriatic and a ten-day (20–29 May 2017) interval when a research cruise has been carried out, when the bottom probes have been operating close to the coast, and for which the satellite data have been available. Meteorological modeling has shown that two pulses of northern winds occurred at the time. The shipborne CTD and ADCP data collected on 28 May 2017 revealed

Phytoplankton often rely on the regeneration of ammonium () to produce biomass and, for some cyanobacteria, nitrogen‐rich toxins, despite low or unmeasurable concentrations in water. Thus, measuring turnover rates (i.e., uptake and regeneration) is necessary to determine its actual availability. The objectives of this study were to quantify water column turnover rates in two large, shallow, eutrophic

Effective fisheries management is crucial for the sustainable use of fishery resources, increasing relying on stock assessments. The Megalaspis cordyla an economically important fish species in Pakistan, require an accurate assessment of its current biomass to take effective management strategies. This study utilized stock assessment techniques, including the Catch-Based Monte Carlo Maximum Sustainable

Anthropogenic climate change is altering coastal systems globally, affecting macroalgae abundance and composition. These macroalgae host diverse microbiomes, including pathogenic bacteria. Of particular concern are Vibrio species, such as Vibrio parahaemolyticus and Vibrio vulnificus, which are linked to human disease and impact public health, the economy, and recreation in coastal areas. This study

The increasing global need for renewable energy has rendered the development of offshore wind energy extremely significant. In areas where ocean depths exceed 50 meters, conventional permanent foundations become economically unfeasible, becoming floating offshore wind turbines (FOWTs) a superior alternative. Simultaneously, the development of marine resources in offshore areas has failed to meet increasing

Surface hydrology in the tropical eastern Indian Ocean significantly impacts low-latitude climate processes including the Indonesian-Australian Monsoon and the Indian Ocean Dipole. Deciphering the evolution of surface hydrology and driving mechanisms is thus important to better understand low-latitude and global climate change. Here, we present ~206 yr-resolved temperature and salinity records of surface

In aquaculture, underwater instance segmentation methods offer precise individual identification and counting capabilities. However, due to the inherent unique optical characteristics and high noise in underwater imagery, existing underwater instance segmentation models struggle to accurately capture the global and local feature information of objects, leading to generally lower detection accuracy

IntroductionTritium exists in the environment primarily in the form of tritiated water (HTO). There is a significant correlation between the radioactive levels of tritium in seawater and the safety of seafood. By accurately and rapidly detecting the tritium activity concentration in seawater, it is possible to effectively assess its potential impact on the seafood supply chain. At present, the detection

IntroductionCoastal regions around the world are influenced by numerous dynamical processes that supply nutrients for primary producers and trigger the food web. Rivers, submarine groundwater discharges (SGD), sediment suspension events, and upwelling, are amongst the more important. However, it is not just the concentration, but also the composition of nutrient supply that determines the type of phytoplankton

Currently, there is also little up to date information on the the current population status and life history traits of AmphiOctopus ovulum, a very often seen cephalopod species in the East China Sea. It is therefore important to figure out the seasonal spatial distribution of this species, both in terms of number and biomass, and the environmental variables which determine them. Additionally, climate

A substantial quantity of sedimentary sand bodies, including sand ridges, sand waves, and sand ripples, have been developed off the southwest coast of Hainan Island, China, with submarine sand ridges exhibiting the most considerable development scale. Determining the distribution, morphology, and evolutionary characteristics of the submarine sand ridges is crucial for exploiting marine sand resources

Fish scales absorb different elements into the calcified matrix from surrounding waters as well as from the foods consumed. Scales microchemistry is drawing rising attention for its applicability in a wide range of fields, including environmental and ecological studies. The article represents an elemental analysis of the scales of five commercially important coastal fishes: Tenualosa ilisha, Sillaginopsis

The age composition of Todaropsis eblanae from the Sardinian waters (western Mediterranean Sea) was studied for the first time through the analysis of growth increments and the comparison of three structures: statoliths, beaks and eye lenses. The analysis was performed on 270 wild specimens of both sexes at different sizes (45-200 mm of mantle length; 6.98-443 g of total weight) and maturity stages

Environmental, social and governance (ESG) practices have become a crucial pathway for the sustainable development of enterprises, and so have shipping enterprises. Based on the unbalanced panel data of China’s A-share listed shipping enterprises from 2009 to 2022, this study uses a multiple regression model to empirically test the impact of ESG performance on carbon emission reduction and its regional

The longevity (lifespan) and growth rates of a given species provide the basis for estimating its contributions to secondary production and energy flow in an ecosystem, for guiding management decisions, and determining recovery times after disturbances. For brittle stars, a class of echinoderms that dominate the megabenthos in various marine systems due to their often large populations, including those