Characteristics of Microplastic in Commercial Aquatic Organisms (original) (raw)
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2019
Plastic is pervasive in modern economies and ecosystems. Early research suggests freshwater fish commonly ingest microplastic (particles \u3c 5 mm), which may influence fish digestive tissues, but no studies have examined historical patterns in microplastic consumption or rates of microplastic retention in fish. We measured microplastic in digestive tissue of specimens collected and preserved over the last century (Field Museum, Chicago). We selected Micropterus salmoides (largemouth bass), Notropis stramineus (sand shiner), Ictalurus punctatus (channel catfish), and Neogobius melanostomus (round goby) because each was well represented in the museum collection, with specimens from urban rivers. Specimens from 1900-2018 showed increases in microplastic concentration from the 1950\u27s to present. in a second project, we collected round gobies from Lake Michigan in Chicago to conduct feeding experiments to measure microplastic ingestion and retention rates. the majority of microplasti...
Journal of Applied Biology & Biotechnology
The world is ever evolving and new technologies are popping up everywhere. New inventions and discoveries have created a better world, but not a sustainable one. The whole earth is drowning in various pollutants and garbage. Plastic pollution has garnered sufficient attention and there are various teams and organizations working toward cleaning our beaches, parks, and environment. However, all these actions will not suffice as plastics have trickled down into microplastics, which are posing a greater threat to our water systems and aquatic fauna. Several ongoing researches focus on marine microplastics, while only 13% of studies are on freshwater. Research on microplastics is now on the rise, with new strategies and restrictions being put into place to curb its accumulation in our marine and freshwater environments. In a recent study, microplastics were found to be present in human blood with. Out of 22 people tested, 17 test subjects had microplastics present in their blood. This review focuses on the adverse effects of microplastics in marine and freshwater ecosystems, with special focus on aquatic fauna.
MICROPLASTICS: POTENTIAL IMPACTS ON AQUATIC BIODIVERSITY
Tropical Freshwater Biology , 2022
Microplastic pollution has been considered an issue of considerable concern for society and aquatic ecosystems due to plastics' unlimited applications and admirable properties. This review paper investigated various groups and sources of microplastics, their potential impacts on aquatic biodiversity, and the mitigation and treatment measures. Microplastics were grouped according to their sources as primary and secondary microplastics. Primary microplastics are generated more from land-based activities (98%) than sea-based activities (2%). Sources of primary microplastics are personal care products, industrial scrubbers, plastic powders, and microbeads, among others. While sources of secondary microplastics are losses of plastic materials during natural disasters, material lost or discarded from fishing vessels and aquaculture facilities, and oil and gas platforms, among others. Microplastics cause toxic effects, reduced food intake, delayed growth, oxidative damage, abnormal behaviour, a barrier to lipid metabolism, and affect fishes at molecular levels, causing genetic damage whereby microplastics absorb polycyclic aromatic hydrocarbons, which cause immunotoxicity, neurotoxicity and genotoxicity to marine species. Mitigation measures to reduce the microplastic pollution's effects include the removal of microbeads from personal care products, improved reuse, recycling and recovery of plastics, improved separation efficiency at wastewater treatment points and development of clean-up and bioremediation and phytoremediation techniques. Treatment methods include microfiltration, ultra-filtration, nanofiltration and reverse osmosis. Microplastics have varying effects on aquatic organisms, but these impacts can be mitigated and treated with different techniques and policy instruments. Therefore, the study recommends avoiding disposing of, reusing, recycling and recovering plastic substances in the aquatic environment for safe and clean waters.
Environments
Plastic is one of the most commonly produced and used materials in the world due to its outstanding features. However, the worldwide use of plastics and poor waste management have led to negative impacts on ecosystems. Plastic degradation in the environment leads to the generation of plastic particles with a size of <5 mm, which are defined as microplastics (MPs). These represent a global concern due to their wide dispersion in water environments and unclear potential ecotoxicological effects. Different studies have been performed with the aim of evaluating the presence and impacts of MPs in the marine environment. However, the presence of MPs in freshwater systems is still poorly investigated, making data retrieval a difficult task. The purpose of this review is to identify the main aspects concerning MPs pollution sources in lakes and rivers, with a focus on freshwater sediments as a site of accumulation and as the habitat of benthic organisms, which are key components of food ...
Microplastics in freshwater fishes: Occurrence, impacts and future perspectives
Fish and Fisheries, 2021
Microplastics (MPs) are small, plastic particles of various shapes, sizes and polymers. Although well studied in marine systems, their roles and importance in freshwater environments remain uncertain. Nevertheless, the restricted ranges and variable traits of freshwater fishes result in their communities being important receptors and strong bioindicators of MP pollution. Here, the current knowledge on MPs in freshwater fishes is synthesized, along with the development of recommendations for future research and sample processing. MPs are commonly ingested and passively taken up by numerous freshwater fishes, with ingestion patterns often related to individual traits (e.g. body size, trophic level) and environmental factors (e.g. local urbanization, habitat features). Controlled MP exposure studies highlight various effects on fish physiology, biochemistry and behaviour that are often complex, unpredictable, species-specific and nonlinear in respect of dose-response relationships. Egestion is typically rapid and effective, although particles of a particular shape and/ or size may remain, or translocate across the intestinal wall to other organs via the blood. Regarding future studies, there is a need to understand the interactions of MP pollution with other anthropogenic stressors (e.g. warming, eutrophication), with a concomitant requirement to increase the complexity of studies to enable impact assessment at population, community and ecosystem levels, and to determine whether there are consequences for processes, such as parasite transmission, where MPs could vector parasites or increase infection susceptibility. This knowledge will determine the extent to which MP pollution can be considered a major anthropogenic stressor of freshwaters in this era of global environmental change.
The physical impacts of microplastics on marine organisms: A review
Environmental Pollution, 2013
Plastic debris at the micro-, and potentially also the nano-scale, are widespread in the environment. Microplastics have accumulated in oceans and sediments worldwide in recent years, with maximum concentrations reaching 100 000 particles m 3. Due to their small size, microplastics may be ingested by low trophic fauna, with uncertain consequences for the health of the organism. This review focuses on marine invertebrates and their susceptibility to the physical impacts of microplastic uptake. Some of the main points discussed are (1) an evaluation of the factors contributing to the bioavailability of microplastics including size and density; (2) an assessment of the relative susceptibility of different feeding guilds; (3) an overview of the factors most likely to influence the physical impacts of microplastics such as accumulation and translocation; and (4) the trophic transfer of microplastics. These findings are important in guiding future marine litter research and management strategies.
Science of the Total Environment, 2021
In contrast to marine ecosystems, the toxicity impact of microplastics in freshwater environments is poorly understood. This contribution reviews the literature on the range of effects of microplastics across and between trophic levels within the freshwater environment, including biofilms, macrophytes, phytoplankton, invertebrates, fish and amphibians. While there is supporting evidence for toxicity in some species e.g. growth reduction for photoautotrophs, increased mortality for some invertebrates, genetic changes in amphibians, and cell internalization of microplastics and nanoplastics in fish; other studies show that it is uncertain whether microplastics can have detrimental long-term impacts on ecosystems. Some taxa have yet to be studied e.g. benthic diatoms, while only 12% of publications on microplastics in freshwater, demonstrate trophic transfer
Microplastics as an emerging threat to the fresh water fishes: A review.
International Journal of Biological Innovations, 2022
In the present scenario, microplastics (MPs) are emitted into the environment either directly from the use of cosmetic products or indirectly from the decomposition of big plastic items. These are commonly found in aquatic environments and amongst the most serious threats to freshwater ecosystems. Plastic components are broken down into the small fragments from large fragments during the treatment procedure in treatment plants of wastewater. Such plants act as an entry point for the MPs into the aquatic ecosystem; so it is necessary that MPs must be removed from the wastewater during the treatment process. Microplastics can be consumed directly by fish or indirectly through prey that contains these particles. These MPs can have a variety of ecotoxicological consequences on fish, including behavioural changes, cytotoxicity, neurotoxicity, and liver stress, among other things. The presence of microplastics along with the contaminants can boost the deposition of such contaminants in aquatic biota. Since the microplastics are of emerging concern, hence authors attempted to explain the possible impacts of these particles on aquatic species and human beings.
Bioavailability and effects of microplastics on marine zooplankton: A review
Microplastics are abundant and widespread in the marine environment. They are a contaminant of global environmental and economic concern. Due to their small size a wide range of marine species, including zooplankton can ingest them. Research has shown that microplastics are readily ingested by several zooplankton taxa, with associated negative impacts on biological processes. Zooplankton is a crucial food source for many secondary consumers, consequently this represents a route whereby microplastic could enter the food web and transfer up the trophic levels. In this review we aim to: 1) evaluate the current knowledge base regarding microplastic ingestion by zooplankton in both the laboratory and the field; and 2) summarise the factors which contribute to the bioavailability of microplastics to zooplankton. Current literature shows that microplastic ingestion has been recorded in 39 zooplankton species from 28 taxonomic orders including holo-and meroplanktonic species. The majority of studies occurred under laboratory conditions and negative effects were reported in ten studies (45%) demonstrating effects on feeding behaviour, growth, development, reproduction and lifespan. In contrast, three studies (14%) reported no negative effects from microplastic ingestion. Several physical and biological factors can influence the bioavailability of microplastics to zooplankton, such as size, shape, age and abundance. We identified that microplastics used in experiments are often different to those quantified in the marine environment, particularly in terms of concentration, shape, type and age. We therefore suggest that future research should include microplastics that are more representative of those found in the marine environment at relevant concentrations. Additionally, investigating the effects of microplastic ingestion on a broader range of zooplankton species and life stages, will help to answer key knowledge gaps regarding the effect of microplastic on recruitment, species populations and ultimately broader economic consequences such as impacts on shell-and finfish stocks.