Abstract
Increasing atmospheric CO2 concentrations generally alter element stoichiometry in plants. However, a comprehensive evaluation of the elevated CO2 impact on plant nitrogen : phosphorus (N:P) ratios and the underlying mechanism has not been conducted. We synthesized the results from 112 previously published studies using meta-analysis to evaluate the effects of elevated CO2 on the N:P ratio of terrestrial plants and to explore the underlying mechanism based on plant growth and soil P dynamics. Our results show that terrestrial plants grown under elevated CO2 had lower N:P ratios in both above- and belowground biomass across different ecosystem types. The response ratio for plant N:P was negatively correlated with the response ratio for plant growth in croplands and grasslands, and showed a stronger relationship for P than for N. In addition, the CO2-induced down-regulation of plant N:P was accompanied by 19.3% and 4.2% increases in soil phosphatase activity and labile P, respectively, and a 10.1% decrease in total soil P. Our results show that down-regulation of plant N:P under elevated CO2 corresponds with accelerated soil P cycling. These findings should be useful for better understanding of terrestrial plant stoichiometry in response to elevated CO2 and of the underlying mechanisms affecting nutrient dynamics under climate change.
Original language | English (US) |
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Pages (from-to) | 3354-3362 |
Number of pages | 9 |
Journal | Ecology |
Volume | 96 |
Issue number | 12 |
DOIs | |
State | Published - Dec 2015 |
Keywords
- Climate change
- Element stoichiometry
- Elevated CO
- Growth rate hypothesis
- Metaanalysis
- Nutrient dynamics
- Progressive nitrogen limitation
- Terrestrial ecosystems
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
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Dive into the research topics of 'Down-regulation of tissue N:P ratios in terrestrial plants by elevated CO2'. Together they form a unique fingerprint.Datasets
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Supplement 2. Data used in meta-analyses for soil phosphatase, labile P, and total P under elevated CO2.
Deng, Q. (Creator), Hui, D. (Contributor), Luo, Y. (Contributor), Elser, J. (Creator), Wang, Y. (Creator), Loladze, I. (Creator), Zhang, Q. (Contributor) & Dennis, S. (Creator), figshare Academic Research System, 2016
DOI: 10.6084/m9.figshare.3563646.v1, https://wiley.figshare.com/articles/dataset/Supplement_2_Data_used_in_meta-analyses_for_soil_phosphatase_labile_P_and_total_P_under_elevated_CO2_/3563646/1
Dataset
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Supplement 2. Data used in meta-analyses for soil phosphatase, labile P, and total P under elevated CO2.
Deng, Q. (Creator), Hui, D. (Contributor), Luo, Y. (Contributor), Elser, J. (Creator), Wang, Y. (Creator), Loladze, I. (Creator), Zhang, Q. (Contributor) & Dennis, S. (Creator), Figshare, 2016
DOI: 10.6084/m9.figshare.3563646, https://wiley.figshare.com/articles/dataset/Supplement_2_Data_used_in_meta-analyses_for_soil_phosphatase_labile_P_and_total_P_under_elevated_CO2_/3563646
Dataset
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Appendix D. The relationships of response ratio of N:P ratio (RRN:P) with that of N concentration or P concentration (RRNc or RRPc) in cropland, grassland, and forest ecosystems, respectively, under elevated CO2.
Deng, Q. (Creator), Hui, D. (Contributor), Luo, Y. (Contributor), Elser, J. (Creator), Wang, Y. (Creator), Loladze, I. (Creator), Zhang, Q. (Contributor) & Dennis, S. (Creator), Figshare, 2016
DOI: 10.6084/m9.figshare.3563655, https://wiley.figshare.com/articles/dataset/Appendix_D_The_relationships_of_response_ratio_of_N_P_ratio_RRN_P_with_that_of_N_concentration_or_P_concentration_RRNc_or_RRPc_in_cropland_grassland_and_forest_ecosystems_respectively_under_elevated_CO2_/3563655
Dataset