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Microplastic pollution enhances methane emissions from remote mountainous lakes via plastisphere-mediated microbial processes
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Comparison of freshwater microbial communities in water and microplastics surfaces: insights from Dongting Lake, China
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Researchers comparing bacterial communities in open water versus microplastic surfaces in Dongting Lake, China found that plastic surfaces selectively enriched Proteobacteria and harbored potentially pathogenic genera including Pantoea and Pseudomonas not dominant in surrounding water. The plastisphere — the microbial community colonizing plastic particles — acts as a dispersal vehicle for pathogens, representing an underappreciated biological dimension of microplastic pollution with direct implications for freshwater quality and public health.
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Microplastics and harmful algae (cyanobacteria) often build up together in polluted lakes, and this review of existing research shows they actually affect each other, plastics stress out the algae, while algae can coat plastics and change how they break down or sink. This combo appears to make lake pollution worse for fish and other wildlife than either problem alone, which matters since these same lakes can be sources of drinking water and food, meaning the risks to human health may be greater than previously understood.
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This review examined plastic pollution in polar Arctic and Antarctic environments, documenting microplastic contamination in some of Earth's most remote and climatically sensitive ecosystems. Because polar regions act as both sinks for globally transported microplastics and amplifiers of climate-related degradation, contamination there signals systemic environmental spread with implications for polar food webs and the organisms—including humans—that depend on them.
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