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Research reveals significant bioavailability of dissolved organic matter in rivers, indicating their role in coastal ecosystems.
, with refractory DOC accounting for 87.17%. These findings demonstrated that medium- and small-sized rivers, despite their relatively low discharge, serve as significant conduits of recalcitrant carbon to coastal waters, highlighting the critical role in coastal carbon sequestration.
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Xie et al. (2026) studied this question.
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