--------------------------------------------- # Data for "Ecosystem fluxes during drought and recovery in an experimental forest" Preferred citation (DataCite format): Werner, Christiane; Meredith, Laura; Ladd, S. Nemiah (2021). Data for "Ecosystem fluxes during drought and recovery in an experimental forest" University of Arizona Research Data Repository. Dataset. https://doi.org/10.25422/azu.data.14632593. Corresponding Author: Christiane Werner, Ecosystem Physiology, Albert-Ludwig-University of Freiburg; Freiburg, Germany, c.werner12345@googlemail.com License: CC BY-NC 4.0 DOI: https://doi.org/10.25422/azu.data.14632593 --------------------------------------------- ## Summary Data used to generate figures for first ecosystem scale publication form the B2 WALD campaign entitled "Ecosystem fluxes during drought and recovery in an experimental forest." This item also includes metadata, figures, and a readme. Abstract: Severe droughts endanger ecosystem functioning worldwide. We investigated how drought affects carbon and water fluxes in addition to soil-plant-atmosphere interactions by tracing 13CO2 and deep water 2H2O label pulses and volatile organic compounds (VOCs) in an enclosed experimental rainforest. Ecosystem dynamics were driven by different plant functional group responses to drought. Drought- sensitive canopy trees dominated total fluxes but also exhibited the strongest response to topsoil drying. Although all canopy-forming trees had access to deep water, these reserves were spared until late in the drought. Belowground carbon transport was slowed, yet allocation of fresh carbon to VOCs remained high. Atmospheric VOC composition reflected increasing stress responses and dynamic soil-plant- atmosphere interactions, potentially affecting atmospheric chemistry and climate feedbacks. These interactions and distinct functional group strategies thus modulate drought impacts and ecosystem susceptibility to climate change. --------------------------------------------- ## Files and Folders ### Data.zip : comma separated values - B2EcosystemPaper_Metadata.xlsx : Definition of variables, units, and additional comments for all data files - Figure 1/Data_Fig1_Repo.csv : Daily ecosystem fluxes and environmental parameters - Figure 2/Data_Fig2_Repo.csv : Plant physiological parameters for four drought response types - Figure 3/Data_Fig3_Repo_Events.csv : Timing of ecosystem events including drought stages - Figure 3/Data_Fig3_Repo_SM.csv : Soil moisture variations with time and depth - Figure 3/Data_Fig3_Repo.csv : Deep water rewet signatures in tree water content and water isotopes - Figure 4/atmo_d13C.csv : Atmospheric 13C-CO2 signatures during ecosystem scale 13C pulse labelling - Figure 4/bulk_repo.csv : Bulk root 13C signatures - Figure 4/leaf_d13C.csv : 13C signature of leaf respiration - Figure 4/mrt.csv : mean residence time of C in different ecosystem compartments - Figure 4/pulse_GPP.csv : GPP of 13C during pulse - Figure 4/soil_d13C.csv : 13C signature of soil respiration - Figure 4/stem_d13C.csv : 13C signature of stem respiration - Figure 4/voc_delta.csv : 13C ratio of leaf VOC emissions - Figure S5/DepositionVelocity_Ratiov1.csv : Ratio of monoterpene to isoprene soil deposition ratios - Figure S6/Data_FigS6_Repo.csv : Tree water content of plants - Figure S8/Data_FigS8_Repo.csv : Daily ecosystem fluxes and environmental parameters (same data as Figure 1) ### Figures.zip : .png, .jpeg, .TIF, and .svg files - Figure 1 : Figure 1 Ecosystem fluxes of CO2, H2O, and VOCs and environmental drivers during drought and recovery - Figure 2 : Figure 2 Physiological responses of different plant functional groups and impact on total water flux - Figure 3 : Figure 3 Deep-water uptake and recovery of plant functional groups - Figure 4 : Figure 4 13C-pulse labeling dynamics in fluxes and pools of ecosystem compartments - Figure S5 : Figure S5 Ratio of the soil deposition velocity (concentration-normalized flux) of monoterpenes to that of isoprene - Figure S6 : Figure S6 Tree water content over time - Figure S8 : Figure S8 Correlation matrix of daily ecosystem fluxes and environmental parameters --------------------------------------------- ## Additional Notes Contributors: - Christiane Werner, Ecosystem Physiology, Albert-Ludwig-University of Freiburg, Freiburg, Germany: co-first author, B2WALD campaign co-lead - Laura K. Meredith, School of Natural Resources and the Environment, University of Arizona, Tucson, AZ, USA and Biosphere 2, University of Arizona; Oracle, AZ, USA: co-first author, B2WALD campaign co-lead - S. Nemiah Ladd, Department of Environmental Sciences, University of Basel, Basel, Switzerland: co-first author, B2WALD campaign co-lead Resource: - Title: Ecosystem fluxes during drought and recovery in an experimental forest - DOI: 10.1126/science.abj6789 Links: - https://doi.org/10.25422/azu.data.14632662