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61,005 resultsShowing papers similar to Ocean acidification enhances microplastic uptake and alters physiological responses in Manila clams
ClearSynthesized effects of medium-term exposure to seawater acidification and microplastics on the physiology and energy budget of the thick shell mussel Mytilus coruscus
Researchers found that combined exposure to ocean acidification and microplastics significantly reduced the feeding rate, food absorption, and energy budget of the thick shell mussel Mytilus coruscus, with acidification amplifying the negative effects of microplastics.
Microplastics can aggravate the impact of ocean acidification on the health of mussels: Insights from physiological performance, immunity and byssus properties
Researchers found that the combination of ocean acidification and microplastic exposure weakened mussel immune systems, reduced feeding performance, and degraded the quality of byssus threads used for attachment. The study suggests that co-occurring ocean acidification and microplastic pollution could increase the vulnerability of bivalves to disease and dislodgement, threatening their survival in future marine environments.
Microplastics impair digestive performance but show little effects on antioxidant activity in mussels under low pH conditions
Researchers exposed thick shell mussels to polystyrene microplastics under both normal and acidified ocean conditions. They found that microplastics had little effect on antioxidant defenses but significantly impaired digestive enzyme activity, with ocean acidification worsening the impact. The study suggests that the combined stress of microplastics and lower pH may pose particular risks to the digestive function of marine shellfish.
Microplastics influence physiological processes, growth and reproduction in the Manila clam, Ruditapes philippinarum
Researchers found that Manila clams ingesting polystyrene microplastics accumulated particles in their gills, digestive glands, and intestines, leading to increased respiration and excretion rates while reducing feeding efficiency. Modeling predicted that long-term exposure would significantly reduce shell and flesh growth rates as well as reproductive potential. The study provides evidence that microplastics can fundamentally alter energy allocation and physiological processes in filter-feeding bivalves.
The multiple responses of Mytilus galloprovincialis in the multi-stressor scenario: Impacts of low pH, low dissolved oxygen, and microplastics
Researchers exposed Mediterranean mussels to the combined stressors of low pH, low dissolved oxygen, and microplastics for 15 days. While whole-organism functions like respiration were unaffected, the study found significant cellular-level impacts, suggesting that microplastics interact with ocean acidification and deoxygenation to cause subtle but measurable stress in marine invertebrates.
Effects of virgin and BaP-adsorbed microplastics ingestion by Manila clams (Ruditapes philippinarum)
Researchers exposed Manila clams to various microplastic polymer types, shapes, and concentrations, finding that clams preferentially ingested sphere-shaped particles due to their resemblance to microalgae, and that feeding rates declined as microplastic concentrations increased. The addition of benzo[a]pyrene as a co-stressor showed that microplastics can act as vectors for transporting hydrophobic contaminants into bivalve tissues.
Oysters under anthropogenic pressure: A cellular perspective on the interactive effects of microplastic pollution and climate change
Researchers exposed oysters to microplastics under combined conditions of elevated temperature and ocean acidification, finding that climate change stressors significantly altered the cellular response to MP pollution. Temperature had a stronger effect than acidification, and combined stressors produced non-additive interactions in immune and oxidative stress markers.
Microplastic ingestion reduces energy intake in the clam Atactodea striata
Researchers found that microplastic ingestion by the clam Atactodea striata reduced clearance rate — and therefore energy intake — particularly at high concentrations, while respiration rate and absorption efficiency remained unchanged, with pseudofaeces and depuration limiting the amount of plastic retained in body tissue.
Combined physiological effects of differentially charged nanoplastics and ocean acidification on the mussel Mytilus coruscus
Researchers assessed the combined effects of differentially charged nanoplastics and ocean acidification on the mussel Mytilus coruscus to understand interactions between these co-occurring stressors. The study found that nanoplastic charge significantly influenced toxicological outcomes, with ocean acidification modulating the physiological responses of mussels to nanoplastic exposure.
Effects of ocean acidification and polystyrene microplastics on the oysters Crassostrea gigas: An integrated biomarker and metabolomic approach
Researchers exposed oysters to polystyrene microplastics of two sizes under both normal and acidified ocean conditions to simulate climate change. They found that ocean acidification and microplastics interacted in complex ways, with smaller microplastics under acidic conditions altering the oysters' metabolic profiles in their digestive organs. This study highlights that climate change may change how microplastics affect the shellfish many people eat.
The Influence of Ocean Acidification on The Surface Alteration of Microplastics
Researchers exposed virgin microplastics to normal seawater (pH 8.0) and acidified seawater (pH 7.7) for 10 days, using field emission scanning electron microscopy to show that ocean acidification accelerates surface aging and physical damage to microplastic particles, suggesting that increasing ocean acidity may enhance chemical leaching from plastics.
Microplastic Feeding and Vital Function of Bivalves Mercenaria Mercenaria in Coastal Zone of Tokyo Bay
Researchers investigated microplastic abundance in coastal sediments of Tokyo Bay and examined the relationship between microplastic ingestion and the physiology of the hard clam Mercenaria mercenaria at Yatsu Tidal Flat. Feeding experiments found that clams expelled microplastics in pseudofeces rather than retaining them in tissue, but microplastic exposure increased filtration volume, suggesting effects on vital physiological functions.
Prepared microplastics interaction with Artemia salina under low pH conditions representing ocean acidification; a simulated environmental exposure
Researchers tested how microplastics interact with brine shrimp under acidic conditions that mimic ocean acidification, using irregularly shaped plastic fragments that resemble real-world pollution rather than uniform lab-made spheres. They found that the combination of low pH and microplastics affected the animals' survival and behavior differently than either stressor alone. The study highlights the importance of testing realistic microplastic shapes when evaluating environmental risks.
Are microplastics impacting shellfish?
Researchers investigated whether microplastic contamination measurably impacts shellfish physiology, growth, reproduction, and health outcomes, assessing the ecological and food safety implications of microplastic exposure in commercially and ecologically important bivalve species.
Environmentally relevant microplastic exposure affects sediment-dwelling bivalves
Researchers exposed two species of sediment-dwelling bivalves to polyethylene microplastics at three concentrations and three size classes for four weeks. The study found species-specific responses including reduced body condition and altered burrowing behavior, suggesting that even at environmentally relevant concentrations, microplastics can affect the physiology and behavior of benthic bivalves.
Impact of polyethylene microplastics on the clam Ruditapes decussatus (Mollusca: Bivalvia): examination of filtration rate, growth, and immunomodulation
Researchers exposed clams to polyethylene microplastics at three different concentrations for 14 days and measured the effects on feeding, growth, and immune function. They found that higher microplastic concentrations reduced the clams' ability to filter water and caused weight loss, while also disrupting immune cell integrity. The study demonstrates that microplastic pollution can impair both the feeding efficiency and immune defenses of shellfish.
Photoaged Microplastics Disrupt the Response of Marine Medaka ( Oryzias melastigma ) to Ocean Acidification: Perspectives from Energy Metabolism and Ammonia Production
Researchers examined how photoaged microplastics interact with ocean acidification to affect marine medaka fish. The study found that UV-weathered microplastics disrupted the fish's ability to compensate for acidified conditions by altering energy metabolism and ammonia production, suggesting that combined exposure to aged microplastics and ocean acidification may be more harmful than either stressor alone.
Exploring the effect of microparticles on bivalves: Exposure of Mytilus galloprovincialis and Ruditapes philippinarum to both microplastics and silt
Researchers exposed mussels and clams to polyethylene microplastics, natural silt particles, and a combination of both, finding that the mixture caused significantly worse mortality and oxidative stress than either substance alone. Clams were more sensitive to microplastic exposure than mussels, while mussels retained more microplastics in their tissues. The study reveals that the combined presence of natural sediment particles and microplastics in coastal waters creates synergistic harmful effects on filter-feeding shellfish that are greater than the sum of individual exposures.
Bioturbation effects and behavioral changes in buried bivalves after exposure to microplastics
Researchers studied how Manila clams interact with microplastics in marine sediments and found that clam burrowing, movement, and feeding behaviors rapidly transported microplastics to depths of 6 to 8 centimeters below the surface. While the clams showed a slightly longer adjustment period when microplastics were present, their overall health and behavior were not significantly affected. The study reveals that burrowing shellfish play an important role in redistributing microplastics deeper into ocean sediments.
Dual impacts of elevated pCO2 on the ecological effects induced by microplastics and nanoplastics: A study with Chlamydomonas reinhardtii
Researchers examined how freshwater acidification from elevated carbon dioxide interacts with polystyrene micro- and nanoplastics to affect a common green algae species. They found that smaller nanoplastics caused greater harm than larger microplastics, primarily through oxidative stress, while acidification alone actually promoted algal growth. The study reveals that climate change and plastic pollution can interact in unexpected ways, with acidification sometimes masking or modifying the toxic effects of plastic particles.
Environmental behavior and toxic effects of micro(nano)plastics and engineered nanoparticles on marine organisms under ocean acidification: A review.
This review examined how ocean acidification interacts with the toxicity of micro- and nano-plastics and engineered nanoparticles in marine ecosystems, finding that lower pH can alter particle surface chemistry and enhance toxic effects in some organisms. The combined stressor perspective is important because climate change and plastic pollution are co-occurring in the same marine environments.
Impact of microplastics and ocean acidification on critical stages of sea urchin (Paracentrotus lividus) early development
Researchers investigated the combined effects of microplastic pollution and ocean acidification on sea urchin early development, finding that acidified conditions amplified microplastic toxicity, disrupting fertilization, embryo development, and larval growth in Paracentrotus lividus.
Effects of nanoplastics on clam Ruditapes philippinarum at environmentally realistic concentrations: Toxicokinetics, toxicity, and gut microbiota
Researchers exposed clams to nanoplastics at concentrations found in real marine environments and tracked how the particles accumulated in their tissues over 14 days. The nanoplastics caused physical damage and significantly altered the clams' gut bacteria. This is concerning because clams are widely consumed seafood, meaning nanoplastic contamination could affect both marine ecosystems and human food sources.
Combined effects of salinity and polystyrene microplastics exposure on the Pacific oysters Crassostrea gigas: Oxidative stress and energy metabolism
Researchers studied how salinity levels affect the toxicity of polystyrene microplastics in Pacific oysters and found that low salinity reduced microplastic uptake but created complex interactions with oxidative stress and energy metabolism. Smaller microplastics generally caused more biological disruption than larger ones across all salinity conditions. This is important because coastal oyster habitats frequently experience salinity changes, and the findings suggest environmental conditions can alter how harmful microplastics are to shellfish.