Journal
SCIENCE ADVANCES
Volume 5, Issue 1, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aav0486
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Funding
- Ecuadorian Ministry of Science [Secretaria de Educacion Superior Ciencia, Tecnologia e Innovacion (SENESCYT)] through the PROMETEO scholar exchange program
- Oakland University Research Development Grant program
- Huron Mountain Wildlife Foundation research grant
- U.S. Department of Energy's Office of Science, Biological and Environmental Research
- U.S. Department of Energy [DE-AC05-00OR22725]
- Kresge Library at Oakland University
- Queen's University Belfast
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River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to conduct a global-scale field experiment in greater than 1000 river and riparian sites. We found that Earth's biomes have distinct carbon processing signatures. Slow processing is evident across latitudes, whereas rapid rates are restricted to lower latitudes. Both the mean rate and variability decline with latitude, suggesting temperature constraints toward the poles and greater roles for other environmental drivers (e.g., nutrient loading) toward the equator. These results and data set the stage for unprecedented next-generation biomonitoring by establishing baselines to help quantify environmental impacts to the functioning of ecosystems at a global scale.
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