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61,005 resultsShowing papers similar to Uptake and Effects of Nanoplastics on the Dinoflagellate Gymnodinium corollarium
ClearResponse of coral reef dinoflagellates to nanoplastics under experimental conditions
Researchers exposed symbiotic dinoflagellates from coral reefs to polystyrene nanoplastics and found that cell growth and aggregation were significantly reduced after 10 days. The findings suggest that nanoplastic pollution could harm the tiny algae that are essential to coral reef health, with potential consequences for reef ecosystems.
Response of Coral Reef Dinoflagellates to Nanoplastics under Experimental Conditions Suggests Downregulation of Cellular Metabolism
Coral reef dinoflagellates were exposed to nanoplastics under controlled laboratory conditions to examine effects on cell growth, aggregation, and physiology. The study found that nanoplastic exposure altered dinoflagellate behavior and cellular responses, with implications for reef symbiotic relationships that depend on algal health.
Heterotrophic Dinoflagellate Growth and Grazing Rates Reduced by Microplastic Ingestion
Researchers found that polystyrene microplastic ingestion significantly reduced the growth and grazing rates of heterotrophic dinoflagellates, suggesting that microplastic pollution could disrupt marine microbial food webs at the single-celled predator level.
Energy metabolism response induced by microplastic for marine dinoflagellate Karenia mikimotoi
Researchers examined how different sizes and types of plastic particles affect the energy metabolism of the marine dinoflagellate Karenia mikimotoi. The study found that smaller polystyrene particles caused greater damage to cell membrane potential, increased polysaccharide content, and weakened ATPase activity, indicating that nano-scale plastics have a more pronounced impact on cellular energy metabolism than larger microplastics.
Microplastics impacts in seven flagellate microalgae: Role of size and cell wall
Seven marine flagellate microalgae species were incubated with 1-micrometer polystyrene microplastics at 10 mg/L, revealing that cell size and the presence of a cell wall strongly influenced the degree of microplastic-induced physiological and growth effects across species.
Toxicity of microplastics and nano-plastics to coral-symbiotic alga (Dinophyceae Symbiodinium): Evidence from alga physiology, ultrastructure, OJIP kinetics and multi-omics
Researchers studied how microplastics and nanoplastics damage Symbiodinium, the algae that live inside coral and keep reefs alive. Even at concentrations found in the real environment, the plastic particles disrupted photosynthesis, caused oxidative stress, and triggered metabolic problems in the algae. Since the breakdown of this coral-algae partnership leads to coral bleaching, microplastic pollution could threaten the reef ecosystems that support fisheries and coastal communities worldwide.
Nanoparticle-Biological Interactions in a Marine Benthic Foraminifer
Researchers exposed single-celled marine organisms called foraminifera to three types of engineered nanoparticles — including polystyrene nanoplastics — and found that all three accumulated inside the cells and triggered oxidative stress (a form of cellular damage). This study shows that even microscopic seafloor organisms are vulnerable to nanoplastic pollution, expanding the known range of species harmed by plastic contamination.
Polystyrene nanoplastics cause growth inhibition, morphological damage and physiological disturbance in the marine microalga Platymonas helgolandica
Researchers exposed marine green microalgae to polystyrene nanoplastics and found significant growth inhibition, increased membrane permeability, disrupted photosynthesis, and visible morphological damage — including surface fragmentation and cellular rupture — at concentrations as low as 200 µg/L.
Microplastic-induced apoptosis and metabolism responses in marine Dinoflagellate, Karenia mikimotoi
Researchers found that micro- and nanoplastics of polystyrene and polymethyl methacrylate induced apoptosis and disrupted metabolism in the harmful algal bloom dinoflagellate Karenia mikimotoi, with effects varying by plastic size and polymer type.
Effects of Nanoplastics on the Dinoflagellate Amphidinium carterae Hulburt from the Perspectives of Algal Growth, Oxidative Stress and Hemolysin Production
Polystyrene nanoplastics at 50 nm diameter inhibited growth, reduced chlorophyll content, elevated reactive oxygen species, and enhanced hemolysin production in the marine dinoflagellate Amphidinium carterae, suggesting that nanoplastic pollution could impair harmful algal bloom dynamics and broader marine food web function.
Internalization of polystyrene microplastics in Euglena gracilis and its effects on the protozoan photosynthesis and motility
Researchers exposed Euglena gracilis protozoa to polystyrene microplastics and found that while photosynthesis was unaffected at tested concentrations, motility was significantly reduced at higher doses, suggesting that microplastics impair locomotion in unicellular flagellates that would normally avoid or evade particles.
Exposure to nanoplastics affects the outcome of infectious disease in phytoplankton
Researchers exposed a cyanobacterium-fungal parasite system to polystyrene nanoplastics and found that at high concentrations, NPs formed heteroaggregates with phytoplankton cells, altered host-parasite dynamics, and disrupted disease outcomes in an ecologically relevant model.
Polystyrene nanoplastics impair the photosynthetic capacities of Symbiodiniaceae and promote coral bleaching
Researchers found that polystyrene nanoplastics at ecologically relevant concentrations impaired the photosynthetic capacity of Symbiodiniaceae algae and promoted coral bleaching, demonstrating that nanoplastic pollution poses a direct threat to coral-symbiont stability.
Nanoplastics impair growth and nitrogen fixation of marine nitrogen-fixing cyanobacteria
Researchers found that nanoplastic exposure significantly reduces growth, photosynthesis, and nitrogen fixation in Crocosphaera watsonii — a key ocean nitrogen-fixer — suggesting that nanoplastic pollution could decrease new nitrogen input to marine ecosystems and impair ocean productivity and biogeochemical cycling.
The effects and mechanisms of polystyrene and polymethyl methacrylate with different sizes and concentrations on Gymnodinium aeruginosum
Researchers exposed the microalga Gymnodinium aeruginosum to polystyrene and polymethyl methacrylate microplastics of different sizes and concentrations, finding that smaller particles and higher concentrations caused greater oxidative stress and growth inhibition. The study revealed that microplastics can physically adhere to and damage algal cell membranes, disrupting cellular structure and function.
Effects of nanoplastics on microalgae and their trophic transfer along the food chain: recent advances and perspectives
This review summarized evidence on how nanoplastics affect microalgae — including growth inhibition, oxidative stress, and altered photosynthesis — and examined trophic transfer of nanoplastics up the food chain, finding that toxicity depended on NP concentration, size, and surface charge.
Are the primary characteristics of polystyrene nanoplastics responsible for toxicity and ad/absorption in the marine diatom Phaeodactylum tricornutum?
Researchers exposed the marine diatom Phaeodactylum tricornutum to 50 nm and 100 nm polystyrene nanoplastics and found that smaller particles triggered faster oxidative stress and photosynthetic damage while larger ones were more stable and caused greater growth inhibition over 72 hours, illustrating how particle size shapes toxicity dynamics in marine algae.
Nanoplastics reshape lipid metabolism in marine microalgae with potential ecological consequence
Researchers exposed a marine microalga important to ocean ecosystems to nanoplastics and found significant disruptions to its lipid metabolism, reducing both biomass and lipid production. The nanoplastics altered the types of fats the algae produced, potentially affecting the nutritional value of these organisms for the marine food web. The findings suggest that nanoplastic pollution could have cascading ecological consequences by disrupting carbon cycling at the base of the food chain.
Characterization of cell responses in Rhodomonas baltica exposed to PMMA nanoplastics
Researchers exposed the marine microalga Rhodomonas baltica to PMMA nanoplastics and found effects on cell growth, photosynthesis, and membrane integrity, demonstrating that this important alga — often used as aquaculture feed — is sensitive to nanoplastic contamination.
Microplastics inhibit the growth of endosymbiotic Symbiodinium tridacnidorum by altering photosynthesis and bacterial community
Researchers exposed a type of algae that lives inside coral to polystyrene microplastics and found that the particles slowed cell growth and reduced photosynthesis. At higher concentrations, the microplastics clumped together with the algal cells and caused physical damage. The findings suggest that microplastic pollution could harm coral reef ecosystems by disrupting the essential relationship between corals and their symbiotic algae.
Impact of Nanoplastics on Marine Life: A Review
This review summarizes current knowledge about the effects of nanoplastics on marine organisms, including impacts on feeding, reproduction, growth, and cellular-level toxicity. Evidence indicates that nanoplastics can be more harmful than larger microplastics due to their ability to cross biological barriers and accumulate in tissues, though more research is needed on real-world exposure levels.
Cell size matters: Nano- and micro-plastics preferentially drive declines of large marine phytoplankton due to co-aggregation.
Experiments showed that polystyrene nano- and microplastics selectively reduced large phytoplankton populations in marine communities by causing them to clump together and sink, while smaller cells were less affected. This size-selective effect could disrupt marine food webs by reducing the large phytoplankton that are important food sources for fish and other marine animals.
Cell size matters: nano- and micro-plastics preferentially drive declines of large marine phytoplankton due to co-aggregation
Nano- and microplastics aggregated preferentially with large marine phytoplankton, causing them to sink faster and reducing their abundance relative to small cells. This selective removal could disrupt marine food webs and reduce the ocean's ability to absorb carbon.
Ecotoxicity of micro- and nanoplastics on aquatic algae: Facts, challenges, and future opportunities
This review provides a comprehensive assessment of how micro- and nanoplastics harm aquatic algae, which form the base of ocean and freshwater food chains. The toxic effects include reduced growth, oxidative stress, and disrupted photosynthesis, with nanoplastics generally causing more damage than larger particles. Since algae support the entire aquatic food web, their decline from plastic pollution could reduce the quality and safety of fish and shellfish consumed by people.