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flag Antarctic krill reject food three times more when microplastics are present, disrupting carbon sequestration.

flag A University of Tasmania-led study found Antarctic krill significantly increase food rejection—by up to threefold—when their food is contaminated with microplastics, an accidental discovery during lab experiments. flag Krill play a key role in the Southern Ocean by forming sinking food boluses that help sequester carbon. flag The findings suggest microplastic pollution may disrupt this process, potentially affecting global carbon cycling. flag The research, published in Biology Letters, highlights growing concerns about how plastic contamination impacts marine ecosystems and biogeochemical cycles.

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