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Where are the global ocean priority conservation areas under the most severe threat from microplastics?
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Microplastic Debris Poses a Serious Threat to the Health of Our Ecosystems and Their Inhabitants
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Researchers surveyed the global distribution and ecological threat of microplastics, finding these sub-5mm particles originating from cosmetics, textiles, and industry in even remote polar environments, with documented harms to diverse organisms across terrestrial and aquatic ecosystems.
Microplastics may pose a greater threat to the base of marine food webs
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This perspective argues that small animals at the base of marine food webs—such as zooplankton and filter feeders—are likely ingesting microplastics at higher rates than larger organisms, yet receive far less research attention. Because these foundational species transfer energy and contaminants to every level of the food chain, microplastic impacts at the base could have outsized consequences for entire marine ecosystems and human seafood safety.
Microplastics' Dangers to Humans and Ecosystems
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Researchers reviewed the global dangers of microplastics to human health and ecosystems, characterizing these particles as a pervasive pollutant with the potential to cause widespread harm across multiple environmental compartments and biological systems.
What happens when plastics break down into microplastics and nanoplastics?
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Researchers Jeff Farner and Bukola Alimi are investigating the chemical and physical transformations that occur as plastic pollution weathers into microplastics and nanoplastics in the environment, tracking how particle properties change over time. Understanding the weathering process is critical because smaller nanoplastic particles exhibit greater biological uptake efficiency and may cross cellular barriers — including the gut, lung, and blood-brain barrier — at higher rates than larger microplastics.
Far more microplastics floating in oceans than thought
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A new sampling method revealed that southern ocean microplastic concentrations are 37 times higher than previously estimated, suggesting that existing models have dramatically underestimated the scale of plastic pollution in Earth's most remote marine environments.
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