Estimating carbon fixation of plant organs for afforestation monitoring using a process-based ecosystem model and ecophysiological parameter optimization

Ecology and Evolution
Tatsuya MiyauchiMakoto Saito

Abstract

Afforestation projects for mitigating CO2 emissions require to monitor the carbon fixation and plant growth as key indicators. We proposed a monitoring method for predicting carbon fixation in afforestation projects, combining a process-based ecosystem model and field data and addressed the uncertainty of predicted carbon fixation and ecophysiological characteristics with plant growth. Carbon pools were simulated using the Biome-BGC model tuned by parameter optimization using measured carbon density of biomass pools on an 11-year-old Eucommia ulmoides plantation on Loess Plateau, China. The allocation parameters fine root carbon to leaf carbon (FRC:LC) and stem carbon to leaf carbon (SC:LC), along with specific leaf area (SLA) and maximum stomatal conductance (gsmax) strongly affected aboveground woody (AC) and leaf carbon (LC) density in sensitivity analysis and were selected as adjusting parameters. We assessed the uncertainty of carbon fixation and plant growth predictions by modeling three growth phases with corresponding parameters: (i) before afforestation using default parameters, (ii) early monitoring using parameters optimized with data from years 1 to 5, and (iii) updated monitoring at year 11 using parameters optimiz...Continue Reading

References

Jun 14, 2002·Trends in Biotechnology·Trevor M Fenning, Jonathan Gershenzon
Feb 3, 2005·Biological Reviews of the Cambridge Philosophical Society·Karl J Niklas
Jul 16, 2008·Proceedings of the National Academy of Sciences of the United States of America·Jianguo LiuXiaodong Chen
Jun 26, 2009·Proceedings of the National Academy of Sciences of the United States of America·Heather KeithDavid B Lindenmayer
Jan 27, 2011·Ecology Letters·Yusuke OnodaNayuta Yamashita

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