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Title: Strong sesquiterpene emissions from Amazonian soils
Authors: Bourtsoukidis, Efstratios
Behrendt, Thomas
Yáñez-Serrano, Ana Maria
Hel?en, Heidi
Diamantopoulos, Efstathios
Catão, Elisa Caldeira Pires
Ashworth, Kirsti
Pozzer, Andrea
Quesada, Carlos Alberto
Martins, Demétrius L.
Sá, Marta O.
Araüjo, Alessandro Carioca de
Brito, Joel F.
Artaxo, Paulo
Kesselmeier, Jürgen
Lelieveld, Jos
Williams, Jonathan C.
Keywords: Oxygen
Ribosome Rna
Rna 16s
Rna 18s
Volatile Organic Compound
Air-soil Interaction
Biogeochemical Cycle
Dry Season
Forest Canopy
Soil Microorganism
Speciation (chemistry)
Clinical Evaluation
Environmental Factor
Field Emission
Mass Fragmentography
Microbial Activity
Proton Transfer Reaction Mass Spectrometry
Rna Transcription
Soil Microflora
Soil Moisture
Spatial Soil Variability
Issue Date: 2018
metadata.dc.publisher.journal: Nature Communications
metadata.dc.relation.ispartof: Volume 9, Número 1
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. © 2018 The Author(s).
metadata.dc.identifier.doi: 10.1038/s41467-018-04658-y
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