ArticlePNAS nexus2026
Riverine woodlands as a dynamic source of the marine sedimentary carbon sink.
Article in PNAS nexus, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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9 authors.
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Abstract
Land plants account for a significant proportion of the organic matter found in marine sediments. However, due to methodological limitations, the specific ecosystems and taxa contributing to this carbon sink have largely remained unknown. By leveraging ancient DNA data from marine sediment cores, this perspective article identifies riverine woodlands as key sources of marine sedimentary organic matter. These highly productive ecosystems grow directly along the land-coastal-ocean carbon transport pathway that links the short-term biological with the long-term geological carbon cycle. Furthermore, they are characterized by taxa that are resistant to decay, such as willows in mid-to-high northern latitudes and mangroves in tropical regions. We hypothesize that at the end of the last glaciation, a major negative feedback loop was established, where warmer temperatures caused glacial melt and increased runoff, promoting riverine vegetation growth. This, in turn, enhanced carbon transport into marine sediments, reduced atmospheric CO
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