Dec 9, 2014

Revisiting the role of nutrient availability on global forest carbon balance

BioRxiv : the Preprint Server for Biology
Enzai Du


Global forests dominate the capacity of carbon (C) sequestration in terrestrial ecosystems and have strong feedbacks to changes in atmospheric CO2 concentrations and climate factors. The role of nutrient availability is becoming crucial with growing evidence that it can regulate the response of ecosystem C sequestration to increased CO2 concentrations, elevated temperature and changed water availability ([Oren et al., 2001][1]; [Wamelink et al., 2009][2]). [Fernández-Martínez et al. (2014)][3] recently concluded that nutrient availability was the chief determinant of net ecosystem production (NEP) and ecosystem carbon-use efficiency (CUEe, the ratio of NEP to gross primary production, (GPP)) in global forests. However, [De Vries (2014)][4] seriously concerned that their analysis of global observational datasets can be subject to bias due to the inclusion of outliers (three very young nutrient-rich forests with extremely high NEPs) and assumed linearity in relationships. Using the same datasets retrieved by digitalizing figures from [Fernández-Martínez et al. (2014)][3], here I have performed statistical analysis regarding the concerns of [De Vries (2014)][4] and found that nutrient-rich and nutrient-poor forests have no differ...Continue Reading

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Mentioned in this Paper

Protease Re
Carbon Dioxide
Statistical Analysis

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