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Reference
Liu, L., King, J.S., Booker, F.L., Giardina, C.P., Allen, H.L. and Hu, S. 2009.
Enhanced litter input rather than changes in litter chemistry drive soil carbon and nitrogen cycles under elevated CO2: a microcosm study. Global Change Biology 15: 441-453.
Background
The authors write that “elevated CO2 has been shown to stimulate plant productivity and change litter chemistry,” and that “these changes in substrate availability may then alter soil microbial processes and possibly lead to feedback effects on nitrogen availability.” However, they state that “the strength of this feedback, and even its direction, remains unknown,” and that “uncertainty remains whether sustained increases in net primary productivity [such as typically occur in response to increases in the air's CO2 content] will lead to increased long-term carbon storage in soil.”
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Tags: CO2, Forest Litter, soil carbon