Harmful algal blooms (HABs) are a worldwide problem and have increased in frequency and intensity in Chile. Evidence supports the notion that interactions between certain HAB species and their pairing algal species could have either a positive or negative effect on their growth. The present study analyzed phytoplankton data using Empirical Dynamic Modelling to identify causal networks between two Pseudo-nitzschia

The pollution of the seas by anthropogenic debris represents a significant environmental and socioeconomic concern. It is of paramount importance to accurately monitor the amount of marine litter in the oceans. However, there is considerable variation in the reported values of marine litter concentrations in certain areas. This uncertainty can be attributed to the inadequacy of the sampling strategies

The decline in water quality, particularly in river water, is a significant concern, especially in semi-arid areas and tourist destinations such as Ladakh. Periodic assessment of water quality could be a crucial step for ensuring its potability and serve as a foundation for formulating effective policies for sustainable water resource management. Consequently, this research aimed to analyze the periodic

By employing Data Envelopment Analysis (DEA) with Slacks-Based Measure (SBM) and DEA-Undesirable Output models, this study aims to investigate the operational and environmental efficiency of 26 major ports across China's Special Economic Zones (SEZs). Focusing on the interplay between operation performance and environmental sustainability, this research evaluates how well these ports manage their operational

This study presents the first evidence of microplastics in natural sea turtle nests at Chagar Hutang Turtle Sanctuary (CHTS) on Redang Island, a crucial habitat for green turtles. Microplastics were detected in all studied turtle nests (0–70 cm depth), with a total abundance of 12,270 microplastic items per kg dry weight of sand. Fibers (80.7 %) were the most prevalent shape, primarily black (37.9 %)

The study of heavy metal content in the sediments of the coastal zone of Qinzhou Harbour was used to analyse the level, distribution and sources of heavy metal pollution in the region and its hazards to the ecological environment and human health. The results showed that the average concentrations of Mn, Ni, Cr, Cu, and Pb exceeded background values along the shores of Qinzhou Harbour, Guangxi. Comprehensive

The ChemicalDrift model is applied to predict concentrations of metals and polycyclic aromatic hydrocarbons emitted from shipping in European seas in 2050, compared to 2018. Sources include antifouling paints (AFPs), discharge water from scrubbers and atmospheric deposition. The fate of pollutants in the marine environment is presented, highlighting the effect of degradation and volatilization, with

Spatial and temporal variation in phytoplankton assemblage and their species responses with varying salinity regimes were investigated in the Hooghly Matlah estuary, India during two annual period. The exhaustive survey in the ten sampling stations recorded 132 species of phytoplankton belonging to 95 genera. The study revealed 12 taxonomic algal groups with the dominance of class Bacillariophyceae

New data on the occurrence of POPs, including polychlorinated biphenyls (PCBs) and legacy pesticides (LPs), along with current-use pesticides (CUPs) in the surface marine sediments of Kongsfjorden over five years (2018–2022) are presented. LPs examined were p,p’-dichlorodiphenyltrichloroethane (DDT), p,p’-l,l-dichloro-2,2-bis(chlorophenyl)ethylene (DDE), and hexachlorocyclohexane (HCH), while CUPs

Discarded or lost fishing gear from recreational or commercial fishers significantly contributes to global marine pollution. This debris accumulates with organic detritus on the seafloor, potentially impacting detrital dynamics. We used an outdoor mesocosm experiment to test hypotheses that soft plastic lures with nylon lines and commercial-grade fish netting influence the decomposition of Ecklonia

Poly- and perfluoroalkyl substances (PFAS) are of global concern due to their persistence and harmful effects on human health and ecosystems. However, research on PFAS in the River Nile and across Africa is limited. This study provides the first assessment of PFAS contamination in fish livers from the River Nile in Sudan, using ultra-high-performance liquid chromatography and high-resolution mass spectrometry

In this study, levels of Al, Cu, Ni, Cd, Cr and Pb were quantified in seawater, sediments, and sea sponges from six sites in the Niger Delta and one relatively clean site outside the Niger Delta area using Inductively Coupled Plasma Optical Emission Spectroscopy and Inductively Coupled Plasma Mass Spectrometry. The metal levels in sponge tissues in μg/mg ranged from 0.22 ± 0.03–0.70 ± 0.10 (Al), 0

Controlled source electromagnetics (CSEM) uses electromagnetic fields (EMF) to detect oil reservoirs. Atlantic haddock, Melanogrammus aeglefinus, is a commercially important demersal fish species that can potentially be impacted by such surveys due to potential overlap with egg distribution. In this study, haddock eggs were exposed to EMF, replicating CSEM survey conditions in a laboratory. Three different

Cadmium (Cd) is a highly soluble pollutant in aquatic ecosystems that poses a significant threat to mollusks. In this study, a solar simulator with a filter was used to establish two light conditions (with and without the ultraviolet [UV] spectrum) for a light-adaptation period (120 d) in Magallana gigas. Following adaptation, Cd was introduced into seawater containing M. gigas. Comprehensive bioaccumulation

Marine debris poses a major threat to marine life including sea turtles. It has been identified as a cause of death in endangered sea turtles and is critical concern in its conservation efforts. In this study, we discovered a large clear plastic sheet (106 cm × 118 cm) in the gastrointestinal tract of a dead stranded leatherback turtle. This debris is the largest ever reported to be ingested by a leatherback

Seawater intrusion, characterized by the infiltration of a seawater wedge into deep coastal freshwater aquifers, poses a significant threat to water quality. Despite extensive research on this hydrogeological phenomenon, monitoring remains challenging, often requiring deep drilling that exacerbates aquifer contamination. This study proposes a novel approach for monitoring seawater intrusion based on

Plastics are a ubiquitous pollutant, and are rapidly colonized by biofilms that sorb inorganic and organic components, forming the interface between plastics and the environment. This study provides a proof of concept for the use of automated quantitative mineralogy (AQM) to illuminate and analyse the metal and mineral component of the plastisphere on plastics sampled from temperate and tropical aquatic

CH4 is among the most potent greenhouse gases. In this study, we investigated one of the important CH4 production hotspots, the continental margins. We examined the spatiotemporal distributions of CH4 in sediment cores from the Bohai and South Yellow Seas, China. Using real-time PCR and metagenomic sequencing, we analyzed the microbial communities related to CH4 production. Our results indicated that

Coastal pond aqua farming is critical in aquaculture and significantly contributes to the seafood supply. Meanwhile, the development of aquaculture ponds also threatens vulnerable wetland resources and coastal ecosystems. Accurate statistics regarding the distribution and variability of coastal pond aquaculture are crucial for balancing the sustainable development of coastal aquaculture and preserving

Rafting is the transport of marine litter by organisms, influenced by substrate characteristics such as degradation, shape, surface orientation, color, and polymer type. This study focuses on rafting in the Southwest Atlantic, characterizing biofouling on different materials across high- and low-energy beaches. Conducted in Guanabara Bay and Niteroi's oceanic beaches, sampling focused on strandlines

Eutrophication of marine ecosystems is a global problem, particularly in a changing climate and the spreading of Oxygen Minimum Zones (OMZs). The eastern Arabian Sea has both seasonal and permanent/perennial OMZs, but our understanding of the fauna there is extremely poor. So, this study investigated the composition and physiological status (alive or dead) of zooplankton (copepods) in the two OMZs

Discarded cigarette butts (CBs) are a significant source of environmental pollution. In areas with large amounts of cigarette waste, environmental hazards may arise due to the leaching of chemicals from filters and smoked tobacco. Accurately estimating the number of CBs on beaches requires a standardized method. Additionally, estimating the release of metals from these pollutants can provide important

This study evaluates heavy metal (Cr, Fe, Ni, Cu, Zn, Hg, Pb, and As) contamination in the Pescara River, Italy, using Total Reflection X-ray Fluorescence, focusing on the impact of Bussi landfills. Analyses revealed that most heavy metals exceed WHO drinking water standards, particularly in upstream areas near industrial sites. Pollution indices resulted: Nemerow Pollution Index (0.43–23.75), Contamination

Eutrophication remains a persistent water quality issue throughout much of the United States, leading to changes to ecosystem health in valuable coastal habitats. Oysters help to buffer against eutrophication by removing nitrogen from the water column by feeding on phytoplankton and other seston, a process referred to as “bioextraction”. Recent legislation in Texas has allowed oysters to be grown off-bottom

The increase of plastic pollution represents a significant ecological threat, particularly in human-impacted environments. However, the effects of plastic ingestion by urban wildlife are less understood. This study investigates the presence of microplastic (MPs; plastic <5 mm in size) and macroplastics (MaPs, plastic >5 mm in size) in yellow-legged gull (Larus michahellis) chicks inhabiting the urban

The Mauritanian Atlantic coast is a vital economic and environmental region, currently facing increasing anthropogenic pressures, leading to pollution such as PAHs contamination which threatens its ecological integrity and economic value. To assess this pollution the coast was divided into 4 zones: 2 anthropogenically stressed (LBZ and PNkt) and 2 unstressed (PNBA and PDlt); next, 16EPA-PAHs concentrations

Coastal ecosystems are increasingly threatened by nutrient imbalances and environmental degradation, which can compromise their stability and productivity. We analyzed the sediment characteristics, microbial community structures, and nutrient cycling across three habitats: mangrove forests, seagrass beds, and bare beaches. The physicochemical properties (including pH, total nitrogen (TN), phosphorus

Macrobenthic bioturbation is vital to facilitate nutrient turnover in estuarine ecosystems and drives spatial heterogeneity in the sediment matrix. In this study, we compared the sediment physico-chemical properties, microbial community structure and functional genes in vertically-stratified sediment samples from bioturbated (burrows of Parasesarma bidens and Tubuca arcuata) and non-bioturbated area

Cribrononion gnythosuturatum is a widely distributed benthic foraminifer. However, its adaptability to salinity changes is still poorly understood. To investigate the response of C. gnythosuturatum to salinity changes, sediment samples were collected from an intertidal zone of the Yellow Sea and cultured at 13 salinity gradients from 0 to 60 psu for 10 weeks. The results of the culture experiments

In December 2023, 25 tons of pellets were lost by the Toconao ship in the Northwest Atlantic Ocean in front of the Portuguese coast. In this work, a coastal stretch of 633 km in Asturias and Galicia (Spain) and Northern Portugal was investigated to assess pellets' concentration on 31 beaches. Field surveys were carried out in March 2024 and focused on sampling plastic pellets deposited along the shoreline

This study investigated nine trace metals (Cr, Co, Cu, Cd, Ni, Mn, Fe, Zn, and Pb) concentrations of coastal sediments adjacent to a heavily industrialized area of Bangladesh using AAS. The most prevalent metals were zinc, with lesser amounts of Cd and Co. Pb, and Cd levels were higher than world standards, with a considerable enrichment of Pb at station 9. Ecological risk assessments showed moderate

The spread of the invasive ascidian Didemnum vexillum represents a major ecological and economic threat in many parts of the world. Recorded for the first time in Norway in 2020, this species is now established in several localities, often characterized by busy port activities. The new detection and expansion of D. vexillum raise significant concerns in Norway, especially due to the potential extension

The volcanic island, Kueishan Island, harbors two unique shallow-water ecosystems: hydrothermal vents and coral communities. The unique geologic features render the island an ideal place as a spectrum for studying two different ecosystems and mimicking the impacts of climate change on coral reef biota in the future. However, little is known about the meiofauna community there. Hence, we investigated

In the marine environment, various weathering effects on micro or nanoplastics lead to surface modifications, which in turn alter their toxic effects on aquatic organisms. This study investigated the impact of three types of nanoplastics (NPs, NPs-NH2, NPs-COOH) on the antioxidant capacity of Mytilus coruscus gills, mantle, and hemolymph over 28 days. Analyzed key antioxidant stress indicators (CAT

The transformation of dissolved organic carbon (DOC) released by macroalgae into refractory dissolved organic carbon (RDOC) through microbial carbon pump (MCP) represents a crucial carbon sequestration process. This process mainly takes place in coastal areas, where it is likely affected by marine anoxia. The interactions between the components of DOC released by kelp and the community structure of

A large amount of microplastics (MPs) in the marine environment have gradually sunk into the benthic area, and crawling organisms can be easily exposed to the MPs. This study aimed to compare the size- and shape-dependent effects of polyethylene terephthalate (PET) on Artemia franciscana, which crawls on the bottom during the juvenile stage. In this study, the juvenile stage A. franciscana was exposed

Arsenic (As) concentrations were measured in the muscle and liver of the speckled guitarfish Pseudobatos glaucostigmus and its main prey Penaeus californiensis, in Santa Rosalia, western Gulf of California, to determine bioaccumulation and biomagnification. Higher mean wet weight (w.w.) values were found in muscle tissue (9.87 μg g−1) compared to liver tissue (5.32 μg g−1); however, the highest concentrations

As the most significant carbon sink on Earth, the ocean has been inevitably absorbing excess atmospheric CO2, leading to high concentration of CO2 that threatens marine life. Like emissions of greenhouse gases, this issue demands urgent attention. Hence, comprehensive investigation and comparison, including both non-electrochemical and electrochemical direct ocean capture (DOC) methods, are revealed

Ulva prolifera, a key species in China's massive green tides, is widely used in aquaculture, biofuel, pharmaceutical and cosmetic industries. In this study, we cultured U. prolifera under 100, 200, and 400 μmol m−2 s−1 with 10:14 and 12:12 light/dark at 15 °C and 25 °C, respectively, to investigate the effectiveness of light intensity, photoperiod, and temperature on the reproduction cell formation

China, the world's largest dredging nation with over 2 billion cubic meters dredged annually, urgently needs tailored strategies for reusing those dredged sediments based on their physicochemical traits and pollution levels. The properties (grain size, pH, density, and conductivity), nutrient contents (organic matter, N, P, K), and heavy metal risks (Cu, Pb, Zn, Cr, Cd, Ni, Hg, As) of dredged sediments

Using an ecosystem model, we simulated the spatiotemporal distribution of phytoplankton and studied its spring bloom (SPB) in the South Yellow Sea, aiming to gain a comprehensive understanding of the physical-biological mechanism, in particular the role of wave-induced mixing in the SPB. By incorporating wave mixing into the model, patterns of the SPB are obtained that are consistent with observations

An event of releasing untreated effluent caused serious decreases in surface seawater pH from 8.1 to lower than 7.5 in seven years and increased back to prior levels after 15 years. It gives us a rare natural experiment to examine the impacts of decreases in pH on the marine plankton communities (phytoplanktons, zooplanktons, shrimp larvae, crab larvae, fish eggs, and larvae) in the natural environment

Benthic dinoflagellates constitute a group of microalgae that inhabit the ocean floor, adhering to substrates such as coral, seagrasses, and sand. Certain species within this group have the potential to produce toxins. Ocean warming could increase the occurrence of harmful benthic dinoflagellate blooms, which pose a significant threat to coastal ecosystems in tropical and subtropical regions. However

This study investigates the spatial and temporal distribution of sea surface microplastic in the Spanish Mediterranean Sea, assessing compliance with the Good Environmental Status (GES) criteria of the European Marine Strategy Framework Directive 2008/56/EC and Barcelona Convention. Data from 668 sea surface water samples collected from 2017 to 2023 were analysed to classify their status according

Tidal flats form behind mangrove forests and are critical coastal ecosystems influenced by ocean and land-based processes. To assess microplastics (MPs, <5 mm) distribution within tidal flats we studied four sites in southwest Puerto Rico with varying mangrove densities and anthropogenic influences. We characterized MPs from surface sediments along a transect at each tidal flat. On average 148.64 ± 138

Tire and road wear particles (TRWP) are generated at the frictional interface between tires and the road surface. This mixture of tire tread and road pavement materials can migrate from roads into nearby water bodies during precipitation events. The absence of mass-based measurements in marine environments introduces uncertainty in environmental risk assessments and fate and transport models. Surface

This study evaluates the nutritional value and health risks of fish from Miliç Wetland, Türkiye, focusing on potentially toxic elements (PTEs) in Esox lucius, Squalius cephalus, and Carassius gibelio. Using ICP-MS, mean PTE concentrations were determined, including Zn (4979 μg/kg), Fe (4241 μg/kg), and As (125 μg/kg). Macro elements like K, P, and Ca were also assessed for nutritional profiling. A

Plastic pollution is omnipresent in the marine environment, including much of the Arctic. Northern fulmars (Fulmarus glacialis) are particularly vulnerable to ingesting plastics floating on the water's surface, and are an international biomonitor of this contaminant. We sampled plastic ≥1 mm in size from the stomachs of fulmars collected by Inuit hunters in Arctic Canada, as well as beached fulmars

Shipping emissions have a direct negative impact on the ecological environment, residents' health and social economy of port cities. However, the relevant literature seldom focuses on the quantitative analysis of economic losses. A Regional CGE (RCGE) model with shipping emissions and diffusion is constructed to evaluate the comprehensive economic impact on Shanghai in this paper. It is found that:

Heavy metal and microplastic pollution are a threat to marine ecosystems. Thus, the present study aims to assess the risk of these contaminants on edible organisms. Water and tissues of macroalgae, prawns, and crabs collected from 27 sites (3 zones) across the Gujarat coast were evaluated for heavy metal and microplastic presence. Chromium and nickel concentrations were highest in water samples of

This work reports on the first multi-scale NMR study of new plant-based herding agent suitable for application in Arctic marine environment. Using NMR spectroscopy the chemical components of the herding agent were established while through the NMR relaxometry and diffusometry the local dynamics, molecular mobility, and transport properties of the components were studied depending on water content upon

The demand for real-time identification of oil spills in disaster emergency response is urgent, Unmanned Aerial Vehicles (UAVs) are important monitoring means for oil spills by advantage of their flexible, fast and low-cost, so it's crucial of developing lightweight model for UAVs. This paper proposed a lightweight hyperspectral identification model called SR-SqueezeNet, which based on SqueezeNet model

Cigarette butts (CBs) are major worldwide pollutants, posing environmental challenges, especially in the current climate crisis. Hence, this study examined the biological responses of Artemia franciscana to smoked (SCBs) and non-smoked (nSCBs) cigarette butt elutriates with increased temperatures. Acute (0.188–4.0 CBs/L, 48 h) and sub-chronic (0.03125–0.5 CBs/L, 7 d) assays were performed, exposing

The degradation of plastic infrastructure installed along estuaries and coastal environments may constitute a significant source of plastic contamination. This study aimed to determine the prevalence of plastic infrastructure and the extent of surface degradation of these plastics in a case study system, the Swan and Canning Estuary, Western Australia. The severity of cracks, chips, deformation, and

We investigated the carbonyl index (CI) of small microplastics (SMPs; 50–350 μm) and large microplastics (LMPs; >350 μm) in the surface waters of the Tokai region and Tokyo Bay in Japan. The degradation was evaluated by determining the CI from the infrared spectrum of microplastics (MPs) adopting the specified area under the band technique. Average CIs of SMPs and LMPs in polyethylene were 2.47 and

Measurements of dissolved methane were performed in a sequentially connected system of water bodies that form the Pregolya River Estuary: Pregolya River – Kaliningrad Sea Canal – Vistula and Curonian Lagoons – Baltic Straight – Baltic Sea. Methane concentrations were detected on a gas chromatograph with a flame ionization detector, and the fluxes were calculated using a boundary layer gas transfer

This study investigated the distribution, sources, and ecological risk of polycyclic aromatic hydrocarbons (PAHs) in the surface sediments of the Western Bay of Bengal (WBoB). Coastal, shelf and slope sediments from the WBoB, collected from different research cruises, were analysed for 16 priority PAH pollutants. Total PAHs (TPAHs) were in the range of 1.87–918.79 ng/g and exhibited a significant association

Mangroves are key providers of crucial ecological services. This study's aim is to investigate the levels of microplastic (MP) contamination in mangroves from Ghana's Western and Central regions. A total of 1303 particles were analysed from sediment and water samples, 65 % comprising MPs. West and Central regions had notable differences in MPs abundance. Sediment had the highest number of MPs (703