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61,005 resultsShowing papers similar to Effects of microplastics on digestive enzymes in the marine isopod Idotea emarginata
ClearFeeding and digestion of the marine isopod Idotea emarginata challenged by poor food quality and microplastics
Laboratory feeding experiments with the marine isopod Idotea emarginata found that microplastic ingestion combined with poor food quality reduced the animal's ability to digest and absorb nutrients effectively, suggesting that microplastics can worsen nutritional stress in marine invertebrates already facing food limitation. The combined effects of dietary microplastics and nutritional deficiency could impair the fitness of marine invertebrates under real-world conditions.
Microplastics alter digestive enzyme activities in the marine bivalve, Mytilus galloprovincialis
Researchers incubated Mediterranean mussels (Mytilus galloprovincialis) with polystyrene and polyethylene microplastics and measured changes in digestive enzyme activity, finding significant reductions in amylase and protease activity, suggesting that microplastics impair nutrient digestion in filter-feeding bivalves.
Fate of Microplastics in the Marine Isopod Idotea emarginata
Researchers studied the fate of microplastics in the marine isopod Idotea emarginata using fluorescent particles embedded in artificial food. The study tracked how microplastics moved through the digestive system, providing detailed observations of ingestion, transit, and excretion of microplastic particles by small marine invertebrates.
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 cause neurotoxicity and decline of enzymatic activities in important bioturbator Hediste diversicolor
Researchers found that microplastic exposure caused neurotoxicity and reduced enzymatic activity in the marine polychaete Hediste diversicolor, an important bioturbator, suggesting that microplastic pollution could impair critical ecological functions in coastal sediments.
The observation of starch digestion in blue mussel Mytilus galloprovincialis exposed to microplastic particles under varied food conditions
Researchers exposed blue mussels (Mytilus galloprovincialis) to microplastics under varying food availability conditions and monitored digestive performance, finding that microplastic ingestion disrupted starch digestion efficiency and that the effect was more pronounced when food was scarce.
Microplastics do not affect the feeding rates of a marine predator
Researchers exposed a marine predatory fish to microplastics at environmentally realistic concentrations and measured feeding rate, finding no significant effect on prey capture behavior, suggesting that concerns about microplastics disrupting predator feeding may not apply at current environmental concentrations.
The influence of microplastics pollution on the feeding behavior of a prominent sandy beach amphipod, Orchestoidea tuberculata (Nicolet, 1849)
Microplastic pollution was found to reduce feeding activity and slow growth in a beach amphipod (small crustacean), even at environmentally relevant concentrations. This suggests microplastics can disrupt energy balance and population health in small invertebrates that play important roles in sandy beach ecosystems.
Influence of microplastics on feeding and energy reserves of terrestrial isopods Porcellio scaber
Researchers exposed land-dwelling pill bugs to food contaminated with microplastics at concentrations found in compost heaps, and measured effects on feeding behavior and energy reserves in the digestive gland. The study investigated whether environmentally realistic microplastic levels in soil affect terrestrial invertebrates, which are important links in soil food webs.
Microplastics affect assimilation efficiency in the freshwater amphipod Gammarus fossarum
Researchers examined how two types of microplastics affect the freshwater amphipod Gammarus fossarum. The study found that microplastic exposure reduced assimilation efficiency in these invertebrates, indicating that microplastic ingestion can interfere with nutrient uptake and energy processing in freshwater organisms.
Microplastics impair extracellular enzymatic activities and organic matter cycling in oligotrophic sandy marine sediments
Researchers investigated how microplastic contamination affects the breakdown of organic matter in sandy marine sediments. They found that microplastics significantly reduced the activity of key enzymes responsible for decomposing organic material, disrupting normal nutrient cycling processes. The study suggests that microplastic accumulation on the seafloor could impair the ecosystem services provided by benthic sediment communities.
Microplastics disrupt energy metabolism in the brackish water flea Diaphanosoma celebensis
Researchers exposed the brackish water flea Diaphanosoma celebensis to polystyrene microplastics and found disruption of digestive enzyme activity and depletion of energy reserves, demonstrating that microplastics impair energy metabolism in this zooplankton species.
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 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.
The Behavior of Planktonic Copepods Minimizes the Entry of Microplastics in Marine Food Webs
Researchers found that planktonic copepods across all major feeding behaviors ingested microplastics at rates up to ten times lower than similar-sized microalgae, suggesting that copepod feeding strategies naturally limit the entry of microplastics into marine food webs.
Influence of Microplastics on the Growth and the Intestinal Microbiota Composition of Brine Shrimp
Researchers exposed brine shrimp to polyethylene and polystyrene microplastics and found that both types significantly reduced growth rates, with body length decreasing by 15-18%. The study also revealed that microplastic ingestion altered the gut microbiota composition, increasing microbial diversity and shifting the balance of key bacterial groups in the shrimp intestines.
Ingestion and adherence of microplastics by estuarine mysid shrimp
Researchers investigated how estuarine mysid shrimp ingest and accumulate microplastics both internally and on their external body surfaces. The study found microplastics in the shrimp's bodies and fecal pellets, and feeding experiments revealed that these organisms readily consume plastic particles, raising concerns about microplastic transfer through marine food webs.
Effect of Microplastics on the Activity of Digestive and Oxidative-Stress-Related Enzymes in Peled Whitefish (Coregonus peled Gmelin) Larvae
Researchers exposed peled whitefish larvae to polystyrene microplastics and measured changes in digestive and antioxidant enzyme activity as indicators of stress. They found that microplastic exposure disrupted normal enzyme functions, suggesting impaired digestion and increased oxidative stress even at relatively low concentrations. The study provides evidence that microplastic contamination in freshwater environments may harm the development and survival of commercially valuable fish species during their most vulnerable life stages.
Effect of PET microplastics on the growth, digestive enzymes, and intestinal flora of the sea cucumber Apostichopus japonicus
Researchers studied how PET microplastics of different sizes and concentrations affect sea cucumbers over a 28-day period. They found that microplastic exposure disrupted digestive enzyme activity and altered the composition of gut bacteria in the animals. The study suggests that microplastic pollution in marine environments could impair the health and digestion of important seafloor organisms even at environmentally relevant levels.
Response of sediment-dwelling bivalves to microplastics and its potential implications for benthic processes
This microcosm study found that microplastics affect the feeding, burrowing, and bioirrigation behaviors of two sediment-dwelling bivalve species, with effects that could alter benthic nutrient cycling. Changes in bivalve behavior caused by microplastic exposure have broader implications for the ecosystem services these organisms provide in marine sediments.
Effects of microplastic ingestion on hydrogen production and microbiomes in the gut of the terrestrial isopod Porcellio scaber
Researchers exposed terrestrial isopods (Porcellio scaber) to biodegradable (PLA) and non-biodegradable (PET, PS) microplastics for eight weeks, finding that despite isopods avoiding PS-containing food, fitness was unaffected while gut microbiome analyses revealed MP-type-specific microbial indicator taxa and stimulatory effects of PLA on hydrogen production.
Differential effects of microplastic exposure on leaf shredding rates of invasive and native amphipod crustaceans
Researchers tested how microplastic exposure affected leaf-eating crustaceans in freshwater, finding that at high concentrations, native species ate significantly less while an invasive species was unaffected. This raises concern that microplastic pollution could give invasive species a competitive edge while disrupting the nutrient recycling work of native invertebrates in rivers and streams.
Exposure to polypropylene microplastics induces the upregulation of protein digestion-associated genes and microbiome reorganization in the octocoral Junceella squamata
This study found that polypropylene microplastic exposure in a model organism upregulated protein digestive enzyme expression, suggesting that microplastic ingestion triggers compensatory digestive responses. The altered digestive physiology may affect nutrient absorption and growth.
Effects of Microplastics on the Activity of Digestive-, Antioxidative- and Immune-related Enzymes in Soiny Mullet (Liza haematocheila Temminck & Schlegel, 1845) Larvae
A 14-day exposure study found that microplastics suppressed digestive and antioxidant enzyme activity in soiny mullet larvae, suggesting that microplastic pollution in estuarine nursery habitats may impair early development in this commercially important species.