AI Article Synopsis
- Soil dissolved organic matter (DOM) is essential for various ecosystems and human health, and this study focuses on its geochemical characteristics across 89 grassland soils in China during the dry season.
- It discovers a gradient in DOM composition from northern to southern China, showing that higher molecular weight fractions with lower biodegradability are linked to decreased soil respiration and productivity.
- The research identifies specific DOM fractions as potential indicators for nasopharyngeal and pancreatic cancer incidences, emphasizing the need for local strategies to manage soil DOM for better environmental and health outcomes.
Article Abstract
Soil dissolved organic matter (DOM) is crucial to atmospheric, terrestrial and aquatic environments as well as human life. Here, by characterizing DOM from 89 grassland soils throughout China, we reveal the spatial association between DOM geochemistry in the dry season vs annual ecosystem exchange and cancer cases. The humic-like and high molecular weight (3.4-25 kDa) fractions with lower biodegradability, decline from the northern to the southern regions of China, and are correlated with lower soil respiration and net ecosystem productivity at the continental scale. The <1.2 kDa and proteinaceous fractions could serve as a geographical indicator of nasopharyngeal cancer incidence and mortality, while the 3.4-25 kDa and humified fractions are potentially associated with pancreatic cancer cases (P < 0.05). Our findings highlight that exploiting the environmental functions of soil DOM and mitigating the negative impacts are necessary, and require actions tailored to local soil DOM conditions.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11284229 | PMC |
| http://dx.doi.org/10.1038/s41467-024-50745-8 | DOI Listing |
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