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Comprehensive multiyear carbon budget of a temperate headwater stream

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Abstract
  • Headwater streams comprise nearly 90% of the total length of perennial channels in global catchments. They mineralize organic carbon entering from terrestrial systems, evade terrestrial carbon dioxide (CO₂ ), and generate and remove carbon through in-stream primary production and respiration. Despite their importance, headwater streams are often neglected in global carbon budgets primarily because of a lack of available data. We measured these processes, in detail, over a 10 year period in a stream draining a 96 ha forested watershed in western Oregon, USA. This stream, which represents only 0.4% of the watershed area, exported 159 kg C ha⁻¹ yr⁻¹, similar to the global exports for large rivers. Stream export was dominated by downstream transport of dissolved inorganic carbon (63 kg C ha⁻¹ yr⁻¹) and by evasion of CO₂ to the atmosphere (42 kg C ha⁻¹ yr⁻¹), leaving the remainder of 51 kg C ha⁻¹ yr⁻¹ for downstream transport of organic carbon (17 kg C ha⁻¹ yr⁻¹ and 34 kg C ha⁻¹ yr⁻¹ in dissolved and particulate form, respectively)
  • This is the publisher’s final pdf. The article is copyrighted by the American Geophysical Union and published by John Wiley & Sons, Inc. It can be found at: http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/%28ISSN%292169-8961/
  • Keywords: carbon, evasion, carbon fluxes, stream, biogeochemistry
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  • Argerich, A., Haggerty, R., Johnson, S. L., Wondzell, S. M., Dosch, N., Corson‐Rikert, H., ... & Thomas, C. K. (2016). Comprehensive multiyear carbon budget of a temperate headwater stream. Journal of Geophysical Research: Biogeosciences, 121(5), 1306-1315. doi:10.1002/2015JG003050
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  • 121
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  • 5
Déclaration de droits
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  • Access to all data sets used for this study are available through the H.J. Andrews Experimental Forest data repository:
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  • Funding for A. A., long-term data, and facilities were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 08-23380), U.S. Forest Service Pacific Northwest Research Station, and Oregon State University. Parts of this study were funded by NSF grants EAR 14-17603 and AGS0955444, the OSU Hollis Dole Fund for Environmental Geology, and the U.S. Forest Service Pacific Northwest Research Station (Joint Venture Agreement 10-JV-11261991-055).
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