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The “Microplastome” – A Holistic Perspective to Capture the Real-World Ecology of Microplastics
Summary
This paper introduces the concept of the "microplastome," a framework for studying microplastics along with everything attached to them, including absorbed chemicals and colonizing microbes, as a unified system. The authors argue that current research too often looks at microplastics in isolation, when in reality the attached pollutants and bacteria may be just as important for understanding health effects. This more complete approach could lead to better risk assessments of how microplastic pollution actually affects ecosystems and human health.
Microplastic pollution, an emerging pollution issue, has become a significant environmental concern globally due to its ubiquitous, persistent, complex, toxic, and ever-increasing nature. As a multifaceted and diverse suite of small plastic particles with different physicochemical properties and associated matters such as absorbed chemicals and microbes, future research on microplastics will need to comprehensively consider their multidimensional attributes. Here, we introduce a novel, conceptual framework of the "microplastome", defined as the entirety of various plastic particles (<5 mm), and their associated matters such as chemicals and microbes, found within a sample and its overall environmental and toxicological impacts. As a novel concept, this paper aims to emphasize and call for a collective quantification and characterization of microplastics and for a more holistic understanding regarding the differences, connections, and effects of microplastics in different biotic and abiotic ecosystem compartments. Deriving from this lens, we present our insights and prospective trajectories for characterization, risk assessment, and source apportionment of microplastics. We hope this new paradigm can guide and propel microplastic research toward a more holistic era and contribute to an informed strategy for combating this globally important environmental pollution issue.