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61,005 resultsShowing papers similar to Effects of microplastics exposure on ingestion, fecundity, development, and dimethylsulfide production in Tigriopus japonicus (Harpacticoida, copepod)
ClearImpacts of nano- and micro-plastics exposure on zooplankton grazing, bacterial communities, and dimethylated sulfur compounds production in the microcosms
Researchers investigated how nano- and microplastics affect zooplankton grazing, bacterial communities, and the production of climate-relevant dimethyl sulfide compounds. The study found that plastic particle exposure reduced zooplankton feeding rates and disrupted dimethyl sulfide production in a dose- and size-dependent manner, with nanoplastics showing greater toxicity than larger microplastics.
Effects of micro- and nano-plastics on community assemblages and dimethylated sulfur compounds production
Researchers conducted a field microcosm experiment to study how micro- and nanoplastics affect marine plankton communities and the production of climate-relevant sulfur compounds. They found that medium and high concentrations of polystyrene, polyethylene, and polyamide particles disrupted zooplankton grazing and altered the production of dimethyl sulfide. The study suggests that plastic pollution could interfere with marine biogeochemical cycles that play a role in climate regulation.
The Impact of Polystyrene Microplastics on Feeding, Function and Fecundity in the Marine Copepod Calanus helgolandicus
Researchers exposed a key marine copepod species to polystyrene microplastics and measured the effects on feeding, egg production, and offspring survival. They found that microplastic ingestion significantly reduced the amount of algae the copepods consumed, lowered their reproductive output, and decreased the hatching success of their eggs. Since copepods are a foundational link in marine food webs, these effects could have cascading consequences for ocean ecosystems.
Consumption Of Microplastics Impacts The Growth And Fecal Properties Of The Marine Copepod, Acartia Tonsa
Lab experiments found that marine copepods (Acartia tonsa) fed polystyrene microplastic beads showed reduced growth and produced smaller, less carbon-rich fecal pellets compared to controls. This is significant because copepod fecal pellets are an important mechanism for transporting carbon from the ocean surface to the deep sea, suggesting microplastics could disrupt marine carbon cycling.
Acute and chronic combined effect of polystyrene microplastics and dibutyl phthalate on the marine copepod Tigriopus japonicus
Researchers tested acute and chronic combined effects of polystyrene microplastics and dibutyl phthalate (a common plastic additive) on the marine copepod Tigriopus japonicus, finding that microplastics altered phthalate accumulation in the copepod and that combined exposure amplified reproductive and developmental toxicity.
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.
Microplastic ingestion induces energy loss on the copepod Tigriopus koreanus
This study found that tiny copepods (small marine crustaceans near the base of the food chain) lose significant energy when they ingest microplastics instead of real food. The microplastics provided no nutrition but took energy to process, reducing the animals' ability to grow and reproduce. Since copepods are a critical food source for fish, this energy loss could ripple up the food chain and ultimately affect seafood quality and availability for humans.
Size-dependent influences of nano- and micro-plastics exposure on feeding, antioxidant systems, and organic sulfur compounds in ciliate Uronema marinum
Researchers studied how nano- and microplastics of different sizes affect a marine ciliate that plays a key role in ocean sulfur cycling. Exposure to polystyrene particles reduced the organisms' ability to feed on algae, which in turn dramatically decreased their production of dimethyl sulfide, a gas important for climate regulation. The findings suggest that plastic pollution could disrupt fundamental ocean chemistry processes beyond its direct effects on individual organisms.
Impacts of microplastics exposure on copepod (Eurytemora affinis) and mussel (Mytilus edulis) gut microbiota
Researchers studied how microplastic exposure affects the copepod Eurytemora affinis and the mussel Mytilus edulis, examining effects on feeding, reproduction, and overall health at relevant environmental concentrations. Results showed microplastics impaired physiological functions in both species, with additional risks from microorganism-colonized plastic surfaces.
The impact of polystyrene microplastics on feeding, function and fecundity in the marine copepod Calanus helgolandicus.
Marine copepods (Calanus helgolandicus) exposed to 20 µm polystyrene beads at 75 particles/mL ingested 11% fewer algal cells and 40% less carbon biomass, and shifted toward smaller prey. Fecundity was also reduced, suggesting microplastic ingestion could impair energy transfer through this critical trophic link.
Chronic effects of nano and microplastics on reproduction and development of marine copepod Tigriopus japonicus
Researchers studied the chronic effects of polystyrene nano- and microplastics on the marine copepod Tigriopus japonicus over 30 days. The study found that nanoplastics were more lethal than microplastics, with different sizes affecting survival, development, and reproduction through distinct mechanisms, though oxidative stress was a common factor at high concentrations.
Effects of Nylon Microplastic on Feeding, Lipid Accumulation, and Moulting in a Coldwater Copepod
Researchers exposed the coldwater copepod Calanus finmarchicus to nylon microplastic granules and fibers at environmentally relevant concentrations and measured effects on feeding, lipid accumulation, and development. They found that while microplastic ingestion did not cause acute toxicity, it reduced algal feeding rates and altered lipid storage patterns. The findings suggest that chronic microplastic exposure could impair the energy reserves these copepods need for overwintering and reproduction.
Decreased Dimethylsulfideand Increased PolybrominatedMethanes: Potential Climate Effects of Microplastic Pollution in AcidifiedOcean
Researchers conducted a ship-based microcosm experiment to investigate how combined microplastic pollution and ocean acidification affect biogenic climate-active gases, finding decreased dimethylsulfide and increased polybrominated methanes, with potential implications for marine climate regulation.
Microplastics alter feeding selectivity and faecal density in the copepod Calanus helgolandicus
This study found that microplastic exposure altered the feeding preferences and fecal characteristics of the copepod Calanus helgolandicus, a key marine zooplankton species. Changes in copepod feeding behavior can affect food web dynamics and the efficiency of carbon transport from surface waters to the deep ocean.
Decreased Dimethylsulfideand Increased PolybrominatedMethanes: Potential Climate Effects of Microplastic Pollution in AcidifiedOcean
Researchers conducted a ship-based microcosm experiment examining the combined effects of microplastic pollution and ocean acidification on short-lived biogenic climate-active gases, finding that these stressors together decreased dimethylsulfide while increasing polybrominated methanes, suggesting novel climate feedback pathways.
Release of Microplastics from Discarded Surgical Masks and Their Adverse Impacts on the Marine Copepod Tigriopus japonicus
Researchers investigated how discarded surgical masks break down in seawater and release microplastics, then tested the effects of those particles on a marine copepod species. They found that masks shed increasing amounts of microplastics over time and that chronic exposure to these particles reduced copepod survival and reproductive success. The study highlights pandemic-related plastic waste as a growing source of marine microplastic pollution with measurable ecological consequences.
Microplastics reduce net population growth and fecal pellet sinking rates for the marine copepod, Acartia tonsa
Researchers studied the effects of polystyrene microplastic ingestion on the marine copepod Acartia tonsa across its life stages. They found that microplastic exposure reduced net population growth, impaired fecundity and egg quality, and decreased fecal pellet sinking rates, suggesting that microplastics could disrupt both zooplankton populations and the carbon settling process in marine ecosystems.
Dietary effects of microplastics on the physiological and biochemical profiles of keystone secondary producers Oithona dissimilis (Lindberg,1941)
This study examined how microplastic ingestion affects the physiology and nutrition of a small marine copepod. The copepods showed reduced survival and reproductive output when fed microplastics alongside their natural diet, suggesting that plastic particles displace nutritious food and impair the health of zooplankton that are foundational to ocean food webs.
Size-Dependent Effects of Micro Polystyrene Particles in the Marine Copepod Tigriopus japonicus
Researchers tested three sizes of polystyrene microbeads on a marine copepod species and found that the smallest particles caused the most significant harm to survival, development, and reproduction. The copepods ingested all three sizes without showing any preference for food over plastic when algae were available. The study adds to growing evidence that nanoscale plastic particles may be more toxic than larger microplastics to small marine organisms critical to ocean food chains.
Polystyrene microplastics alter plankton community and enhance greenhouse gas emissions: A case study in the China coastal sea
Researchers demonstrated through ship-based and laboratory experiments that polystyrene microplastics suppress phytoplankton growth by up to 82 percent and increase dissolved organic carbon accumulation in coastal seawater. The microplastics restructured plankton communities and enhanced the production of brominated volatile halocarbons, which are ozone-depleting substances and greenhouse gases. The study suggests that microplastic pollution in coastal waters may have cascading effects on marine carbon cycling and atmospheric chemistry.
Effects of microplastics on marine copepods
This review examines how microplastics affect marine copepods, the tiny crustaceans that form a critical link in ocean food chains. Researchers found that copepods readily ingest microplastics, which can block their digestive tracts, reduce feeding, trigger immune responses, deplete energy reserves, and impair reproduction. The effects depend on the size, shape, and chemical properties of the plastic particles, and microplastics can also carry other toxic pollutants that amplify the harm.
Sublethal effects of microplastic and oil co-exposure on biological rates and lipid profiles of keystone Arctic copepods
Researchers conducted the first assessment of combined microplastic and oil exposure effects on three key Arctic copepod species. They found that co-exposure to polyethylene microplastics and oil caused sublethal effects on feeding rates, egg production, and lipid profiles that differed from oil-only exposure. The study suggests that the presence of microplastics may alter how Arctic zooplankton respond to oil pollution, which is relevant as shipping and industrial activity increase in polar regions.
Decreased Dimethylsulfide and Increased Polybrominated Methanes: Potential Climate Effects of Microplastic Pollution in Acidified Ocean
A ship-based microcosm experiment simulating ocean acidification and microplastic pollution found that combined conditions decreased dimethylsulfide production and increased polybrominated methane emissions, with potential climate-active gas implications for ocean carbon cycling.
Microplastic Consumption and Its Effect on Respiration Rate and Motility of Calanus helgolandicus From the Marmara Sea
Researchers found that the copepod Calanus helgolandicus from the Marmara Sea actively consumed polystyrene microplastic beads of 6, 12, and 26 µm, with the strongest preference for 6 µm beads, and that microplastic ingestion increased respiration rate and reduced motility, indicating energetic costs from plastic consumption.