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61,005 resultsShowing papers similar to Uptake of polystyrene microplastics by marine rotifers under different experimental conditions
ClearThe Effect of Polystyrene (Ps) Microplastic Exposure with Different Doses on the Growth and Survival of Rotifera (Brachionus sp.)
This study tested how polystyrene microplastics at different doses affect the growth and survival of tiny aquatic organisms called rotifers. The results showed harmful effects at higher doses, demonstrating that microplastics can disrupt organisms at the base of the food chain, which can have ripple effects up to the seafood humans eat.
The uptake and elimination of polystyrene microplastics by the brine shrimp, Artemia parthenogenetica, and its impact on its feeding behavior and intestinal histology
Researchers studied the uptake, elimination, and intestinal effects of polystyrene microplastics on brine shrimp larvae. They found that the larvae ingested microplastics at rates dependent on concentration, exposure time, and food availability, and that the particles caused intestinal damage. The study demonstrates that microplastic contamination can harm the health and feeding behavior of zooplankton larvae, which are critical components of marine food webs.
A marine Plankton-Plastic Predation Loop: selective grazing, excretion and reingestion of microplastics by the rotifer Brachionus plicatilis
Researchers found that the rotifer Brachionus plicatilis preferentially grazes phytoplankton over similarly sized polyethylene microplastic beads but still ingests microplastics — including previously excreted particles — proposing a 'Plankton-Plastic Predation Loop' where the same particles are repeatedly ingested and could continually disrupt marine food webs.
Feeding type and development drive the ingestion of microplastics by freshwater invertebrates
Researchers exposed freshwater invertebrates with different feeding strategies to fluorescent polystyrene microplastics of various sizes and found that all species ingested particles in a concentration-dependent manner. Filter feeders like Daphnia magna consumed the most particles, while feeding type and developmental stage strongly influenced ingestion rates. The study suggests that feeding strategy is a key predictor of microplastic uptake in freshwater food webs, and that younger organisms may be more vulnerable.
The Influence of Polystyrene Microspheres Abundance on Development and Feeding Behavior of Artemia salina (Linnaeus, 1758)
Researchers exposed brine shrimp larvae to polystyrene microspheres at various concentrations with and without a food source over seven days. They found that microplastic ingestion was dose-dependent and significantly influenced by food availability, with the highest contamination occurring when no food was present. The study suggests that microplastic pollution can disrupt feeding behavior and delay development in early life stages of marine organisms.
Assessing the toxicity of polystyrene beads and silica particles on the microconsumer Brachionus calyciflorus at different timescales
Researchers assessed the toxicity of polystyrene microbeads and silica particles to the freshwater rotifer Brachionus calyciflorus at multiple timescales, finding that both particle types caused dose-dependent toxic effects that evolved differently over short-term and long-term exposure periods.
Size dependent uptake and trophic transfer of polystyrene microplastics in unicellular freshwater eukaryotes
Researchers demonstrated that single-celled freshwater organisms can take in polystyrene microplastics and pass them up the food chain through predator-prey interactions. The size of the microplastic determined which organisms could ingest it, and some particles remained inside cells for up to 14 days. This is important because it shows microplastics enter the food web at the very lowest level, meaning contamination can accumulate through every step up to fish and eventually to humans.
Ingestion and Toxicity of Polystyrene Microplastics in Freshwater Bivalves
Researchers investigated microplastic ingestion in the freshwater mussel Dreissena polymorpha using polystyrene spheres of various sizes. They found that mussels rapidly ingested microplastics and that body burden was influenced by exposure time, body size, food abundance, and microplastic concentration, providing important baseline data on how freshwater bivalves interact with microplastic pollution.
Combined effects of microplastics and temperature on the competition between Brachionus havanaensis and Brachionus calyciflorus (Rotifera)
Researchers evaluated the combined effects of polystyrene microplastics at 10 and 20 mg/L and temperature (20 and 25 degrees C) on population growth and competitive interactions between the freshwater rotifers Brachionus havanaensis and Brachionus calyciflorus. Microplastics reduced population growth rates in both species at both temperatures, with competitive outcomes shifting in favor of B. havanaensis under microplastic exposure, suggesting microplastics can alter species competition dynamics in aquatic ecosystems.
Feeding type affects microplastic ingestion in a coastal invertebrate community
Researchers exposed a coastal Baltic Sea invertebrate community — including mussels, crustaceans, and deposit feeders — to microplastic beads at three concentrations and found that feeding mode strongly determined ingestion rates, with filter-feeding bivalves accumulating significantly more particles than deposit feeders or free-swimming crustaceans.
Effects of polystyrene microplastics on early stages of two marine invertebrates with different feeding strategies
Researchers exposed early life stages of two marine invertebrates to polystyrene microplastics to measure effects on development and survival. The study found that even early life stages are vulnerable to microplastic exposure, raising concerns about impacts on marine invertebrate populations.
Impact of polystyrene microplastics on Daphnia magna mortality and reproduction in relation to food availability
Researchers exposed the freshwater crustacean Daphnia magna to polystyrene microplastics under varying food availability conditions and found that microplastic impacts on mortality and reproduction were most severe when food was limited. The study suggests that the ecological effects of microplastics on zooplankton are strongly influenced by nutritional status, with food-stressed organisms being more vulnerable to particle ingestion.
Effects of nanoplastics exposure on ingestion, life history traits, and dimethyl sulfide production in rotifer Brachionus plicatilis
Researchers exposed tiny marine organisms called rotifers to polystyrene nanoplastics and found that the particles accumulated in their digestive tracts, shortened their lifespans, and reduced their ability to reproduce. Higher concentrations also decreased the production of dimethyl sulfide, a compound important for cloud formation and climate regulation. This study shows that nanoplastic pollution can affect marine organisms at the base of the food chain, with potential ripple effects on both ecosystems and the climate.
Uptake of plastic microbeads by ciliate Paramecium aurelia
This study demonstrated that the single-celled ciliate Paramecium aurelia ingests polystyrene microbeads, with particle uptake depending on concentration and exposure time. Even single-celled protists that are foundational to aquatic food webs can take up microplastics, potentially concentrating particles that are then transferred to organisms that feed on them.
Food availability is crucial for effects of 1-μm polystyrene beads on the nematode Caenorhabditis elegans in freshwater sediments
Researchers found that the effects of polystyrene microplastics on the nematode C. elegans in freshwater sediments depended critically on food availability, with negative impacts on reproduction only emerging under low-food conditions.
Ingestion and bioaccumulation of polystyrene nanoplastics and their effects on the microalgal feeding of Artemia franciscana
Brine shrimp (Artemia franciscana) exposed to polystyrene nanoplastics ingested and bioaccumulated the particles, which also affected their feeding behavior on microalgae and caused changes in gut microbiota. These effects on a widely used aquaculture species raise concerns about nanoplastic contamination in marine food production.
Direct and trophic exposure of polystyrene and environmental nanoplastics on Corbicula fluminea
Researchers investigated the effects of both direct and trophic exposure routes to polystyrene and environmental nanoplastics on the freshwater bivalve Corbicula fluminea, assessing uptake and biological responses under ecologically relevant conditions.
Effects of ingested polystyrene microplastics on brine shrimp, Artemia parthenogenetica
Brine shrimp larvae (Artemia parthenogenetica) were exposed to 10 μm polystyrene microspheres at concentrations close to environmentally extrapolated levels, with microspheres clearly ingested and accumulated in the gut, resulting in reduced feeding rates and growth at higher concentrations. The study demonstrates that microplastic ingestion by brine shrimp, a widely used aquaculture feed organism, occurs at ecologically relevant concentrations and causes sublethal harm.
Size dependent uptake and trophic transfer of polystyrene microplastics in unicellular freshwater eukaryotes
Researchers investigated the size-dependent uptake and trophic transfer of fluorescent polystyrene microplastic beads (0.5 µm and 6 µm) and fragments in unicellular freshwater eukaryotes, examining internalization dynamics at lower trophic levels where microplastic transfer is poorly understood.
Ingestion and egestion of polystyrene microplastic fragments by the Pacific oyster, Crassostrea gigas
Researchers investigated size-specific ingestion and egestion of polystyrene microplastic fragments by Pacific oysters, finding that oysters can ingest and later expel microplastics, with the process varying by particle size.
Ingestion, egestion and physiological effects of polystyrene microplastics on the marine jellyfish Rhopilema esculentum
Researchers investigated how the edible jellyfish Rhopilema esculentum ingests and ejects polystyrene microbeads, finding relatively low ingestion rates but chronic physiological effects at both environmental and predicted microplastic concentrations.
The role of microbe-microplastic associations in marine Nematode feeding behaviors
Researchers found that microbial biofilms growing on microplastics influenced marine nematode feeding behavior, with nematodes showing preferential consumption of biofilm-coated particles, suggesting that microbial colonization plays a key role in why organisms ingest microplastics.
Impacts of nanoplastics on life-history traits of marine rotifer (Brachionus plicatilis) are recovered after being transferred to clean seawater
Marine rotifers (Brachionus plicatilis) were exposed to polystyrene nanoplastics across two generations and then transferred to clean seawater, with results showing that life-history impairments including reduced reproduction recovered after removal of plastic exposure. The finding suggests that nanoplastic effects on zooplankton are reversible upon return to clean conditions, though generational exposure still caused measurable harm.
Effect of microplastic particles on the population growth rate and clearance rate of selected ciliates (Protista, Ciliophora)
Researchers exposed three species of freshwater ciliates to polystyrene microplastic beads and found that the effects on population growth varied by species and were strongly dependent on microplastic concentration. The organisms readily ingested the plastic particles, with uptake rates influenced by particle size, concentration, and exposure time. The study suggests that microplastics can disrupt microbial food webs by interfering with single-celled organisms at the base of aquatic ecosystems.