Effects of elevated concentrations of atmospheric CO2 and tropospheric O3 on decomposition of fine roots

Jack A. Chapman; John S. King; Kurt S. Pregitzer; Donald R. Zak

doi:10.1093/treephys/25.12.1501

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Effects of elevated concentrations of atmospheric CO₂ and tropospheric O₃ on decomposition of fine roots

Informally Refereed

Authors:

Jack A. Chapman, John S. King, Kurt S. Pregitzer, Donald R. Zak

Year:

2005

Type:

Scientific Journal

Station:

Northern Research Station

DOI:

https://doi.org/10.1093/treephys/25.12.1501

Source:

Tree Physiology. 25: 1501-1510.

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Download (PDF 182 KB): https://research.fs.usda.gov/download/treesearch/34625.pdf

Abstract

Rising atmospheric carbon dioxide (CO₂) concentration ([CO₂]) could alter terrestrial carbon (C) cycling by affecting plant growth, litter chemistry and decomposition. How the concurrent increase in tropospheric ozone (O₃) concentration ([O₃]) will interact with rising atmospheric [CO2] to affect C cycling is unknown.Amajor component of carbon cycling in forests is fine root production, mortality and decomposition. To better understand the effects of elevated [CO₂] and [O₃] on the dynamics of fine root C, we conducted a combined field and laboratory incubation experiment to monitor decomposition dynamics and changes in fine root litter chemistry.

Keywords

carbon cycle, chemistry, dissolved organic carbon, FACE, field incubation, laboratory incubation, mass loss, microbial respiration

Citation

Chapman, Jack A.; King, John S.; Pregitzer, Kurt S.; Zak, Donald R. 2005. Effects of elevated concentrations of atmospheric CO2 and tropospheric O3 on decomposition of fine roots.