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Ecological Impacts of Microplastics on Rotifers and Fish
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This review pulls together existing research showing that microplastics harm tiny aquatic organisms called rotifers and the fish that eat them, causing everything from reproductive problems to organ damage. Because these plastics build up as they move through the food chain, they eventually end up in the fish we eat—meaning this isn't just an ecosystem problem, it's a potential seafood safety issue for humans too. The authors say more research is urgently needed to understand the risks and find ways to reduce them.
Microplastics (MPs) are widely emerging pollutants that can affect different levels of the food chain from plankton to fish and even to human health. We summarized the impact of MPs on various levels of the food chain using rotifers and fish as the focus. Rotifers are essential food web components in aquatic systems and are highly sensitive to MPs. Rotifers suffered significant internal damage and reproductive disorders when exposed to MPs. Nutritional stress made rotifers more sensitive to MPs, and the population of rotifers declined after several generations of exposure. In addition, rotifers can transfer MPs and pollutants, such as heavy metals, to the next level of the food chain. Fish are important predators and environmental indicators. MPs can cause various problems at different levels in fish, including growth inhibition, tissue damage, immunosuppression, nerve damage, metabolic disorders, hormone interference, and reproduction disorders. NPs can pass through biological barriers and cause molecular damage, while larger MPs cause only physical damage. MPs accumulated in the body of fish and transferred to humans through fish consumption. MPs interacted with other environmental pollutants, and the combination enhanced their effects. MPs contaminated the food chain and ecosystem by reducing the number and fitness of the levels of rotifers and affecting the amount of energy transferred to fish larvae and the stability of fish populations. The movement of MPs in the food chain is extensive and threatens the health of the ecosystem and seafood safety. Therefore, more research and mitigation strategies are urgently needed to solve this problem.
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Microplastics in Aquatic Ecosystems: Impacts on Fish Health and Potential Risks to Human Health
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This review pulls together existing research showing that tiny plastic particles in water harm fish, damaging their organs, growth, and reproduction. Since these particles build up in fish that people eat, they may enter our food chain too. The researchers call for less plastic production and better waste treatment to curb the problem.
Microplastics in Aquatic Ecosystems: Impacts on Fish Health and Potential Risks to Human Health
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This review paper summarizes existing research showing that tiny plastic particles in water are harming fish, damaging their organs, growth, and reproduction. Since these microplastics build up in fish that end up on our plates, they could eventually affect human health too. The authors call for less plastic production, more recycling, and better wastewater treatment to tackle the problem.
Ecological Impacts of Microplastics on Marine Organisms
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This review paper pulls together existing research on how tiny plastic particles (microplastics) build up in oceans and harm marine life like algae, shellfish, and fish—sometimes damaging their cells. Because these particles can move up the food chain from small organisms to larger ones, and seafood is a major part of many diets, this matters for humans too: what accumulates in fish and shellfish may eventually end up on our plates. The research doesn't pinpoint exact human health risks yet, but it underscores why scientists are increasingly concerned about plastic pollution's ripple effects through the food web.
Effects of microplastics on reproductive characteristics and mechanisms of the marine rotifer Brachionus plicatilis
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Researchers exposed marine rotifers (tiny animals at the base of the ocean food chain) to naturally aged microplastics collected from Japanese coastal waters and found reduced reproduction and population growth. The microplastics triggered oxidative stress and suppressed genes involved in reproduction. Since rotifers are food for many fish species, harm to their populations could ripple up through the food chain.
Exploring the ecotoxicological impacts of microplastics on freshwater fish: A critical review
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This review examines how microplastics affect freshwater fish, which often mistake the tiny particles for food. Once ingested, microplastics do not stay in the gut -- they enter the bloodstream and spread to the gills, liver, brain, heart, and reproductive organs, causing hormonal, immune, neurological, and reproductive problems. Because microplastics build up in the food chain, the contamination of fish has broader implications for other animals and for people who eat freshwater fish.
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