Strong sesquiterpene emissions from Amazonian soils

E. Bourtsoukidis; T. Behrendt; A. M. Yañez-Serrano; H. Hellén; E. Diamantopoulos; E. Catão; K. Ashworth; A. Pozzer; C. A. Quesada; D. L. Martins; M. Sá; A. Araujo; J. Brito; P. Artaxo; J. Kesselmeier; J. Lelieveld; J. Williams

doi:10.1038/s41467-018-04658-y

Strong sesquiterpene emissions from Amazonian soils

E. Bourtsoukidis^*, T. Behrendt, A. M. Yañez-Serrano, H. Hellén, E. Diamantopoulos, E. Catão, K. Ashworth, A. Pozzer, C. A. Quesada, D. L. Martins, M. Sá, A. Araujo, J. Brito, P. Artaxo, J. Kesselmeier, J. Lelieveld, J. Williams

^*Corresponding author for this work

Section for Environmental Chemistry and Physics

29 Citations (Scopus)

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Abstract

The Amazon rainforest is the world's largest source of reactive volatile isoprenoids to the atmosphere. It is generally assumed that these emissions are products of photosynthetically driven secondary metabolism and released from the rainforest canopy from where they influence the oxidative capacity of the atmosphere. However, recent measurements indicate that further sources of volatiles are present. Here we show that soil microorganisms are a strong, unaccounted source of highly reactive and previously unreported sesquiterpenes (C₁₅H₂₄; SQT). The emission rate and chemical speciation of soil SQTs were determined as a function of soil moisture, oxygen, and rRNA transcript abundance in the laboratory. Based on these results, a model was developed to predict soil-atmosphere SQT fluxes. It was found SQT emissions from a Terra Firme soil in the dry season were in comparable magnitude to current global model canopy emissions, establishing an important ecological connection between soil microbes and atmospherically relevant SQTs.

Original language	English
Article number	2226
Journal	Nature Communications
Volume	9
ISSN	2041-1723
DOIs	https://doi.org/10.1038/s41467-018-04658-y
Publication status	Published - 2018

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Bourtsoukidis, E., Behrendt, T., Yañez-Serrano, A. M., Hellén, H., Diamantopoulos, E., Catão, E., Ashworth, K., Pozzer, A., Quesada, C. A., Martins, D. L., Sá, M., Araujo, A., Brito, J., Artaxo, P., Kesselmeier, J., Lelieveld, J., & Williams, J. (2018). Strong sesquiterpene emissions from Amazonian soils. Nature Communications, 9, [2226]. https://doi.org/10.1038/s41467-018-04658-y

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title = "Strong sesquiterpene emissions from Amazonian soils",

abstract = "The Amazon rainforest is the world's largest source of reactive volatile isoprenoids to the atmosphere. It is generally assumed that these emissions are products of photosynthetically driven secondary metabolism and released from the rainforest canopy from where they influence the oxidative capacity of the atmosphere. However, recent measurements indicate that further sources of volatiles are present. Here we show that soil microorganisms are a strong, unaccounted source of highly reactive and previously unreported sesquiterpenes (C15H24; SQT). The emission rate and chemical speciation of soil SQTs were determined as a function of soil moisture, oxygen, and rRNA transcript abundance in the laboratory. Based on these results, a model was developed to predict soil-atmosphere SQT fluxes. It was found SQT emissions from a Terra Firme soil in the dry season were in comparable magnitude to current global model canopy emissions, establishing an important ecological connection between soil microbes and atmospherically relevant SQTs.",

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AU - Behrendt, T.

AU - Yañez-Serrano, A. M.

AU - Hellén, H.

AU - Diamantopoulos, E.

AU - Catão, E.

AU - Ashworth, K.

AU - Pozzer, A.

AU - Quesada, C. A.

AU - Martins, D. L.

AU - Sá, M.

AU - Araujo, A.

AU - Brito, J.

AU - Artaxo, P.

AU - Kesselmeier, J.

AU - Lelieveld, J.

AU - Williams, J.

PY - 2018

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Strong sesquiterpene emissions from Amazonian soils

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