10.5061/DRYAD.07ND0HC
Trierweiler, Annette M.
Princeton University
Winter, Klaus
Smithsonian Tropical Research Institute
Hedin, Lars O.
Princeton University
Data from: Rising CO2 accelerates phosphorus and molybdenum limitation of
N2-fixation in young tropical trees
Dryad
dataset
2019
Phosphorous
Tropical nitrogen fixation
CO2 fertilization
Tropical carbon sink
Inga marginata
nutrient limitation
Molybdenum
Ormosia macrocalyx
Handroanthus guayacan
National Science Foundation
https://ror.org/021nxhr62
NSF GRFP
2019-05-24T00:00:00Z
2019-05-24T00:00:00Z
en
https://doi.org/10.1007/s11104-018-3685-7
97557 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Background and Aims: Nitrogen fixation may be critical for supplying the
nitrogen (N) needed to maintain the tropical carbon sink in a world of
rising atmospheric CO2. However, we do not know whether increased CO2 acts
to exacerbate nutrient limitation on the fixation process itself. We
experimentally test this idea by growing N2-fixing plants in
pre-Industrial (280 ppm), present-day (400 ppm), and doubled (800 ppm)
atmospheric CO2. Methods: In a greenhouse experiment, we grew tree
seedlings from N2-fixing species and a non-fixing species at three CO2
concentrations with control, +P (phosphorus), +Mo (molybdenum), and +P+Mo
nutrient treatments. Results: We found nutrient limitation to be minimal
at pre-Industrial CO2, but with increasing CO2 fixer growth and fixation
became increasingly limited by P and by a P-by-Mo interaction. At 400 ppm,
plants with +P grew ~50% faster and fixed 10-15x more N2 based on nodule
mass and nitrogenase activity. At 800 ppm, plants with +P+Mo grew 200%
more, and fixed 25x more N2, suggesting Mo-P co-limitation at elevated
CO2. Conclusion: Our findings imply that complex patterns of nutrient
limitation can develop as CO2 rises, potentially suppressing tropical
N2-fixation and new inputs of N needed to sustain the tropical carbon
sink.
Trierweiler_2011_2012_CO2_P_Mo_growth_dataSeedling growth and fixation
data collected from our CO2, P, Mo fertilization experiment. See README
file for complete documentation.Trierweiler_2011_CO2_P_Mo_CN_dataLeaf
tissue measurements of %N, %C and C:N from our CO2, P, Mo fertilization
experiment. See README file for complete documentation.
Panama