Data for "Ecosystem fluxes during drought and recovery in an experimental forest"
datasetposted on 03.06.2021, 23:24 by Laura MeredithLaura Meredith, S. Nemiah LaddS. Nemiah Ladd, Christiane Werner
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.
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.
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Biochemical link between plant volatile organic compound (VOC) emissions and CO2 metabolism - from sub-molecular to ecosystem scales
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