title: Concurrent and lagged impacts of an anomalously warm year on autotrophic and heterotrophic components of soil respiration: a deconvolution analysis.
abstract: *Partitioning soil respiration into autotrophic (R(A)) and heterotrophic (R(H)) components is critical for understanding their differential responses to climate warming. *Here, we used a deconvolution analysis to partition soil respiration in a pulse warming experiment. We first conducted a sensitivity analysis to determine which parameters can be identified by soil respiration data. A Markov chain Monte Carlo technique was then used to optimize those identifiable parameters in a terrestrial ecosystem model. Finally, the optimized parameters were employed to quantify R(A) and R(H) in a forward analysis. *Our results displayed that more than one-half of parameters were constrained by daily soil respiration data. The optimized model simulation showed that warming stimulated R(H) and had little effect on R(A) in the first 2 months, but decreased both R(H) and R(A) during the remainder of the treatment and post-treatment years. Clipping of above-ground biomass stimulated the warming effect on R(H) but not on R(A). Overall, warming decreased R(A) and R(H) significantly, by 28.9% and 24.9%, respectively, during the treatment year and by 27.3% and 33.3%, respectively, during the post-treatment year, largely as a result of decreased canopy greenness and biomass. *Lagged effects of climate anomalies on soil respiration and its components are important in assessing terrestrial carbon cycle feedbacks to climate warming.
authors.affiliation: Department of Botany and Microbiology, University of Oklahoma, Norman, OK 73019, USA.
authors.forename: Xuhui
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Department of Botany and Microbiology, University of Oklahoma, Norman, OK 73019, USA.
authors.forename: Yiqi
authors.initials: Y
authors.lastname: Luo
authors.affiliation: Department of Botany and Microbiology, University of Oklahoma, Norman, OK 73019, USA.
authors.forename: Chao
authors.initials: C
authors.lastname: Gao
authors.affiliation: Division of Earth and Ecosystem Sciences, Desert Research Institute, Reno, NV 89512, USA.
authors.forename: Paul S J
authors.initials: PSJ
authors.lastname: Verburg
authors.affiliation: Division of Earth and Ecosystem Sciences, Desert Research Institute, Reno, NV 89512, USA.
authors.forename: John A
authors.initials: JA
authors.lastname: Arnone
authors.affiliation: Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309, USA.
authors.forename: Anthony
authors.initials: A
authors.lastname: Darrouzet-Nardi
authors.affiliation: Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO 80305, USA.
authors.forename: David S
authors.initials: DS
authors.lastname: Schimel
mesh_terms: D000704:Analysis of Variance; D052818:Autotrophic Processes / Q000502:physiology*; D002244:Carbon / Q000032:analysis; D019069:Cell Respiration; D052836:Heterotrophic Processes / Q000502:physiology*; D016013:Likelihood Functions; D008954:Models, Biological; D059828:Plant Cells; D010944:Plants / Q000378:metabolism*; D012987:Soil / Q000032:analysis*; D013696:Temperature; D014867:Water
chemical_list: D012987:Soil; D014867:Water; D002244:Carbon
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