Effects of drought and recovery on soil volatile organic compound fluxes in an experimental rainforest

Giovanni Pugliese (), Johannes Ingrisch, Laura K. Meredith, Eva Y. Pfannerstill, Thomas Klüpfel, Kathiravan Meeran, Joseph Byron, Gemma Purser, Juliana Gil-Loaiza, Joost Haren, Katerina Dontsova, Jürgen Kreuzwieser, S. Nemiah Ladd, Christiane Werner and Jonathan Williams
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Giovanni Pugliese: University of Freiburg
Johannes Ingrisch: University of Freiburg
Laura K. Meredith: University of Arizona
Eva Y. Pfannerstill: Max Planck Institute for Chemistry
Thomas Klüpfel: Max Planck Institute for Chemistry
Kathiravan Meeran: Universität Innsbruck, Department of Ecology
Joseph Byron: Max Planck Institute for Chemistry
Gemma Purser: UK Centre for Ecology & Hydrology, Penicuik
Juliana Gil-Loaiza: University of Arizona
Joost Haren: University of Arizona
Katerina Dontsova: Biosphere 2, University of Arizona
Jürgen Kreuzwieser: University of Freiburg
S. Nemiah Ladd: University of Freiburg
Christiane Werner: University of Freiburg
Jonathan Williams: Max Planck Institute for Chemistry

Nature Communications, 2023, vol. 14, issue 1, 1-13

Abstract: Abstract Drought can affect the capacity of soils to emit and consume biogenic volatile organic compounds (VOCs). Here we show the impact of prolonged drought followed by rewetting and recovery on soil VOC fluxes in an experimental rainforest. Under wet conditions the rainforest soil acts as a net VOC sink, in particular for isoprenoids, carbonyls and alcohols. The sink capacity progressively decreases during drought, and at soil moistures below ~19%, the soil becomes a source of several VOCs. Position specific 13C-pyruvate labeling experiments reveal that soil microbes are responsible for the emissions and that the VOC production is higher during drought. Soil rewetting induces a rapid and short abiotic emission peak of carbonyl compounds, and a slow and long biotic emission peak of sulfur-containing compounds. Results show that, the extended drought periods predicted for tropical rainforest regions will strongly affect soil VOC fluxes thereby impacting atmospheric chemistry and climate.

Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40661-8

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DOI: 10.1038/s41467-023-40661-8

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