Soil volatile organic compound emissions in response to soil warming and nitrogen deposition

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Biogenic volatile organic compounds (VOCs) play crucial roles in ecosystems at multiple scales, ranging from mediating soil microbial interactions to contributing to atmospheric chemistry. However, soil VOCs and how they respond to environmental change remains understudied. We aimed to assess how 2 abiotic global change drivers, soil warming and simulated nitrogen (N) deposition, impact soil VOC emissions over time in a temperate forest. We characterized the effect of warming, N deposition, and their interaction on the composition and emissions of soil VOCs during the growing season of 2 consecutive years. We found that chronic warming and N deposition enhanced total VOC emissions at certain times of the year (as high as 332.78 mg m-2 h-1), but that overall VOC composition was not strongly affected by these global change treatments. However, certain compounds, particularly sesquiterpenoids and alkanes, were sensitive to these treatments, with their emissions increasing under both chronic warming and N deposition. Moreover, specific signature VOCs-α-pinene, β-thujone, β-caryophyllene, and 2,4-dimethylheptane-were consistently found under chronic warming and N deposition. This suggests that emissions of specific VOC classes/compounds may increase under global change.

OriginalsprogEngelsk
Artikelnummer65
TidsskriftElementa
Vol/bind10
Udgave nummer1
Antal sider11
ISSN2325-1026
DOI
StatusUdgivet - 2022

Bibliografisk note

CENPERMOA[2022]
Funding Information:
The Soil Warming ⨯ Nitrogen Addition Study at Harvard Forest is maintained with support from the NSF Long Term Ecological Research (LTER; DEB-1832110, 1832110) and Long-Term Research in Environmental Biology (LTREB; DEB-1456610, 1949958) Programs. Postdoctoral fellowship support to ALR-O was provided by the New Hampshire Agricultural Experiment Station (NH-AES) and the Diversity and Innovation Scholars Program at the University of New Hampshire. CLD-M, MK, and RR were supported by the Danish Council for Independent Research | Natural Sciences (DFF–4181-00141) and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No 771012).

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Copyright: © 2022 The Author(s)

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