Nitrogen Regulation of Carbon Sequestration in Terrestrial Ecosystems in Respons
Date: Friday, September 30 @ 09:00:00 MDT
Topic: Impacts of High CO2 on Ecosystems

by Yiqi Luo

A highly controversial issue in global change research is the regulation of terrestrial carbon (C) sequestration by soil nitrogen (N) availability. The Third Assessment IPCC Report predicts rising atmospheric CO2 alone could stimulate terrestrial carbon (C) sequestration by 350 – 980 Pg (=1015 g) C in the 21st Century. Sequestering 350 – 980 Gt C in terrestrial ecosystems requires 7.7 – 37.5 Pg (N) based on a stoichiochemical relationship that approximately 0.005 g N is required for 1 g C stored in long-lived plant biomass (i.e., wood) and 0.067 g N for 1 g C sequestered in soil organic matter (SOM). Thus, to realistically predict future C sequestration in terrestrial ecosystems, we have to understand how closely C and N processes are coupled in response to rising Ca.

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This article comes from The 7th International CO2 Conference Web Site

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