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Gross primary production responses to warming, elevated CO 2 , and irrigation: quantifying the drivers of ecosystem physiology in a semiarid grassland

Journal Article · · Global Change Biology
DOI:https://doi.org/10.1111/gcb.13602· OSTI ID:1349600
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [8];  [9];  [10];  [11];  [12];  [12];  [13];  [14];  [15];  [16]
  1. Lancaster Environment Centre (United Kingdom)
  2. Northern Arizona Univ., Flagstaff, AZ (United States). School of Informatics, Computing, and Cyber Systems; Northern Arizona Univ., Flagstaff, AZ (United States). Dept. of Biological Sciences
  3. Northern Arizona Univ., Flagstaff, AZ (United States). Dept. of Biological Sciences
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmental Sciences Division and Climate Change Science Inst.
  5. Macquarie Univ., NSW (Australia). Dept. of Biological Sciences
  6. Univ. of Western Sydney, NSW (Australia). Hawkesbury Inst. for the Environment
  7. Univ. of Wyoming, Laramie, WY (United States). Dept. of Botany
  8. Colorado State Univ., Fort Collins, CO (United States). Natural Resource Ecology Lab.
  9. Univ. Paris-Saclay, Gif-sur-Yvette (France). Lab. des Sciences du Climat et de l'Environnement (LSCE)
  10. Univ. of Exeter (United Kingdom). College of Engineering, Mathematics, and Physical Sciences
  11. Commonwealth Scientific and Industrial Research Organization (CSIRO), Ocean and Atmosphere, Aspendale, Vic. (Australia)
  12. Max Planck Inst. for Biogeochemistry, Jena (Germany). Biogeochemical Integration Dept.
  13. Univ. of Illinois, Urbana, IL (United States). Dept. of Atmospheric Sciences
  14. Senckenberg Biodiversity and Climate Research Centre, Frankfurt (Germany)
  15. Univ. of Oklahoma, Norman, OK (United States). Dept. of Microbiology & Plant Biology; East China Normal Univ. (ECNU), Shanghai (China). Research Center for Global Change and Ecological Forecasting
  16. Univ. of Western Sydney, NSW (Australia). Hawkesbury Inst. for the Environment; Univ. of Wyoming, Laramie, WY (United States). Dept. of Botany
+ Show Author Affiliations
Determining whether the terrestrial biosphere will be a source or sink of carbon (C) under a future climate of elevated CO2 (eCO2) and warming requires accurate quantification of gross primary production (GPP), the largest flux of C in the global C cycle. We evaluated six years (2007-2012) of flux-derived GPP data from the Prairie Heating and CO2 Enrichment (PHACE) experiment, situated in a mixed prairie grassland in Wyoming (USA). The GPP data were fitted to a mixed effects model that extended a light response model to include the effects of environmental (soil water content, vegetation greenness, nitrogen) and meteorological data (air temperature, vapor pressure deficit, photosynthetically active radiation) at current and past times. The stimulation of the cumulative six-year GPP by warming (20%, P=0.06) and eCO2 (19%, P=0.14) were primarily driven by enhanced C uptake during spring (96%, P=0.003) and fall (115%, P=0.001), respectively. These enhancements were consistent across each year, suggesting mechanisms for extending the growing season. Vapor pressure deficit from 1-3 days prior was the most significant predictor of temporalvariability in GPP and for explaining treatment differences in GPP, suggesting that atmospheric drought plays an important role for predicting GPP now and under future climate conditions.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725; SC0006973
OSTI ID:
1349600
Alternate ID(s):
OSTI ID: 1400811
OSTI ID: 23159769
Journal Information:
Global Change Biology, Journal Name: Global Change Biology Journal Issue: 8 Vol. 23; ISSN 1354-1013
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Elevated CO2 and Warming Altered Grassland Microbial Communities in Soil Top-Layers journal August 2018
Data from: Gross primary production responses to warming, elevated CO2, and irrigation: quantifying the drivers of ecosystem physiology in a semiarid grassland dataset January 2020
Rainfall pulse response of carbon fluxes in a temperate grass ecosystem in the semiarid Loess Plateau journal October 2018
Quantifying antecedent climatic drivers of tree growth in the Southwestern US journal October 2017
Legacies of more frequent drought in ponderosa pine across the western United States journal July 2019
ORCHIDEE-SOM: modeling soil organic carbon (SOC) and dissolved organic carbon (DOC) dynamics along vertical soil profiles in Europe journal January 2018
ORCHIDEE-SOM: Modeling soil organic carbon (SOC) and dissolved organic carbon (DOC) dynamics along vertical soil profiles in Europe posted_content November 2017

Figures / Tables (22)

Figure 1(p. 30)figure Figure 1
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Figure 5(p. 34)figure Figure 5
Table 1(p. 35)table Table 1
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Table 3(p. 37)table Table 3
Figure S1(p. 47)figure Figure S1
Figure S2a(p. 48)figure Figure S2a
Figure S2b(p. 49)figure Figure S2b
Figure S2c(p. 50)figure Figure S2c
Figure S3(p. 51)figure Figure S3
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Table S1(p. 53)table Table S1
Table S2(p. 53)table Table S2
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Table S4a(p. 57)table Table S4a
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Table S4c(p. 58)table Table S4c

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