Antecedent moisture and temperature conditions modulate the response of ecosystem respiration to elevated CO<inf>2</inf> and warming

Edmund M. Ryan, Kiona Ogle, Tamara J. Zelikova, Dan R. Lecain, David G. Williams, Jack A. Morgan, Elise Pendall

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Terrestrial plant and soil respiration, or ecosystem respiration (R<inf>eco</inf>), represents a major CO<inf>2</inf> flux in the global carbon cycle. However, there is disagreement in how R<inf>eco</inf> will respond to future global changes, such as elevated atmosphere CO<inf>2</inf> and warming. To address this, we synthesized six years (2007-2012) of R<inf>eco</inf> data from the Prairie Heating And CO<inf>2</inf> Enrichment (PHACE) experiment. We applied a semi-mechanistic temperature-response model to simultaneously evaluate the response of R<inf>eco</inf> to three treatment factors (elevated CO<inf>2</inf>, warming, and soil water manipulation) and their interactions with antecedent soil conditions [e.g., past soil water content (SWC) and temperature (SoilT)] and aboveground factors (e.g., vapor pressure deficit, photosynthetically active radiation, vegetation greenness). The model fits the observed R<inf>eco</inf> well (R<sup>2 </sup>= 0.77). We applied the model to estimate annual (March-October) R<inf>eco</inf>, which was stimulated under elevated CO<inf>2</inf> in most years, likely due to the indirect effect of elevated CO<inf>2</inf> on SWC. When aggregated from 2007 to 2012, total six-year R<inf>eco</inf> was stimulated by elevated CO<inf>2</inf> singly (24%) or in combination with warming (28%). Warming had little effect on annual R<inf>eco</inf> under ambient CO<inf>2</inf>, but stimulated it under elevated CO<inf>2</inf> (32% across all years) when precipitation was high (e.g., 44% in 2009, a 'wet' year). Treatment-level differences in R<inf>eco</inf> can be partly attributed to the effects of antecedent SoilT and vegetation greenness on the apparent temperature sensitivity of R<inf>eco</inf> and to the effects of antecedent and current SWC and vegetation activity (greenness modulated by VPD) on R<inf>eco</inf> base rates. Thus, this study indicates that the incorporation of both antecedent environmental conditions and aboveground vegetation activity are critical to predicting R<inf>eco</inf> at multiple timescales (subdaily to annual) and under a future climate of elevated CO<inf>2</inf> and warming.

Original languageEnglish (US)
Pages (from-to)2588-2602
Number of pages15
JournalGlobal Change Biology
Volume21
Issue number7
DOIs
StatePublished - Jul 1 2015

Fingerprint

Ecosystems
respiration
Moisture
warming
moisture
Soils
soil water
ecosystem
Water content
vegetation
water content
temperature
Temperature
soil ecosystem
soil respiration
photosynthetically active radiation
vapor pressure
carbon cycle
global change
prairie

Keywords

  • Antecedent effects
  • Carbon cycle
  • Elevated CO<inf>2</inf>
  • Grasslands
  • Soil respiration
  • Temperature acclimation
  • Warming

ASJC Scopus subject areas

  • Ecology
  • Global and Planetary Change
  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Ryan, E. M., Ogle, K., Zelikova, T. J., Lecain, D. R., Williams, D. G., Morgan, J. A., & Pendall, E. (2015). Antecedent moisture and temperature conditions modulate the response of ecosystem respiration to elevated CO<inf>2</inf> and warming. Global Change Biology, 21(7), 2588-2602. https://doi.org/10.1111/gcb.12910

Antecedent moisture and temperature conditions modulate the response of ecosystem respiration to elevated CO<inf>2</inf> and warming. / Ryan, Edmund M.; Ogle, Kiona; Zelikova, Tamara J.; Lecain, Dan R.; Williams, David G.; Morgan, Jack A.; Pendall, Elise.

In: Global Change Biology, Vol. 21, No. 7, 01.07.2015, p. 2588-2602.

Research output: Contribution to journalArticle

Ryan, EM, Ogle, K, Zelikova, TJ, Lecain, DR, Williams, DG, Morgan, JA & Pendall, E 2015, 'Antecedent moisture and temperature conditions modulate the response of ecosystem respiration to elevated CO<inf>2</inf> and warming', Global Change Biology, vol. 21, no. 7, pp. 2588-2602. https://doi.org/10.1111/gcb.12910
Ryan, Edmund M. ; Ogle, Kiona ; Zelikova, Tamara J. ; Lecain, Dan R. ; Williams, David G. ; Morgan, Jack A. ; Pendall, Elise. / Antecedent moisture and temperature conditions modulate the response of ecosystem respiration to elevated CO<inf>2</inf> and warming. In: Global Change Biology. 2015 ; Vol. 21, No. 7. pp. 2588-2602.
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abstract = "Terrestrial plant and soil respiration, or ecosystem respiration (Reco), represents a major CO2 flux in the global carbon cycle. However, there is disagreement in how Reco will respond to future global changes, such as elevated atmosphere CO2 and warming. To address this, we synthesized six years (2007-2012) of Reco data from the Prairie Heating And CO2 Enrichment (PHACE) experiment. We applied a semi-mechanistic temperature-response model to simultaneously evaluate the response of Reco to three treatment factors (elevated CO2, warming, and soil water manipulation) and their interactions with antecedent soil conditions [e.g., past soil water content (SWC) and temperature (SoilT)] and aboveground factors (e.g., vapor pressure deficit, photosynthetically active radiation, vegetation greenness). The model fits the observed Reco well (R2 = 0.77). We applied the model to estimate annual (March-October) Reco, which was stimulated under elevated CO2 in most years, likely due to the indirect effect of elevated CO2 on SWC. When aggregated from 2007 to 2012, total six-year Reco was stimulated by elevated CO2 singly (24{\%}) or in combination with warming (28{\%}). Warming had little effect on annual Reco under ambient CO2, but stimulated it under elevated CO2 (32{\%} across all years) when precipitation was high (e.g., 44{\%} in 2009, a 'wet' year). Treatment-level differences in Reco can be partly attributed to the effects of antecedent SoilT and vegetation greenness on the apparent temperature sensitivity of Reco and to the effects of antecedent and current SWC and vegetation activity (greenness modulated by VPD) on Reco base rates. Thus, this study indicates that the incorporation of both antecedent environmental conditions and aboveground vegetation activity are critical to predicting Reco at multiple timescales (subdaily to annual) and under a future climate of elevated CO2 and warming.",
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AB - Terrestrial plant and soil respiration, or ecosystem respiration (Reco), represents a major CO2 flux in the global carbon cycle. However, there is disagreement in how Reco will respond to future global changes, such as elevated atmosphere CO2 and warming. To address this, we synthesized six years (2007-2012) of Reco data from the Prairie Heating And CO2 Enrichment (PHACE) experiment. We applied a semi-mechanistic temperature-response model to simultaneously evaluate the response of Reco to three treatment factors (elevated CO2, warming, and soil water manipulation) and their interactions with antecedent soil conditions [e.g., past soil water content (SWC) and temperature (SoilT)] and aboveground factors (e.g., vapor pressure deficit, photosynthetically active radiation, vegetation greenness). The model fits the observed Reco well (R2 = 0.77). We applied the model to estimate annual (March-October) Reco, which was stimulated under elevated CO2 in most years, likely due to the indirect effect of elevated CO2 on SWC. When aggregated from 2007 to 2012, total six-year Reco was stimulated by elevated CO2 singly (24%) or in combination with warming (28%). Warming had little effect on annual Reco under ambient CO2, but stimulated it under elevated CO2 (32% across all years) when precipitation was high (e.g., 44% in 2009, a 'wet' year). Treatment-level differences in Reco can be partly attributed to the effects of antecedent SoilT and vegetation greenness on the apparent temperature sensitivity of Reco and to the effects of antecedent and current SWC and vegetation activity (greenness modulated by VPD) on Reco base rates. Thus, this study indicates that the incorporation of both antecedent environmental conditions and aboveground vegetation activity are critical to predicting Reco at multiple timescales (subdaily to annual) and under a future climate of elevated CO2 and warming.

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