Volatilome of Aleppo Pine litter over decomposition process

Autor: Mathieu Santonja, Justine Viros, Henri Wortham, Elena Ormeño, Catherine Fernandez, Brice Temime-Roussel
Přispěvatelé: Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE), Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), Laboratoire Chimie de l'environnement (LCE), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC), LITTERVOC project (Emission de composés organiques volatils par la litière des forêts méditerranée-nnes soumises au changement climatique) - funded by the French National program EC2CO (Ecosphère Continentale et Côtière) from CNRS and the Fédération de Recherche 3098 ECCOREV (ECosystèmes COntinentaux et Risques EnVironnementaux) - and the CORVOLIM project (Inventaire d'émissions de Composés ORganiques VOlatils par la LItière de la végétation Méditerranéenne : application à la qualité de l'air) funded by program BioDivMeX (BioDiversity of the Mediterranean experi-ment) of the meta- program MISTRALS (Mediterranean Integrated STudies at Regional And Local Scales, Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Ecology and Evolution
Ecology and Evolution, Wiley Open Access, 2021, 11 (11), pp.6862-6880. ⟨10.1002/ece3.7533⟩
Ecology and Evolution, Vol 11, Iss 11, Pp 6862-6880 (2021)
Ecology and Evolution, 2021, 11 (11), pp.6862-6880. ⟨10.1002/ece3.7533⟩
ISSN: 2045-7758
DOI: 10.1002/ece3.7533⟩
Popis: Biogenic Volatile Organic Compounds (BVOC) are largely accepted to contribute to both atmospheric chemistry and ecosystem functioning. While the forest canopy is recognized as a major source of BVOC, emissions from plant litter have scarcely been explored with just a couple of studies being focused on emission patterns over litter decomposition process. The aim of this study was to quantitatively and qualitatively characterize BVOC emissions (C1–C15) from Pinus halepensis litter, one of the major Mediterranean conifer species, over a 15‐month litter decomposition experiment. Senescent needles of P. halepensis were collected and placed in 42 litterbags where they underwent in situ decomposition. Litterbags were collected every 3 months and litter BVOC emissions were studied in vitro using both online (PTR‐ToF‐MS) and offline analyses (GC‐MS). Results showed a large diversity of BVOC (58 compounds detected), with a strong variation over time. Maximum total BVOC emissions were observed after 3 months of decomposition with 9.18 µg gDM −1 hr−1 mainly composed by terpene emissions (e.g., α‐pinene, terpinolene, β‐caryophyllene). At this stage, methanol, acetone, and acetic acid were the most important nonterpenic volatiles representing, respectively, up to 26%, 10%, and 26% of total emissions. This study gives an overview of the evolution of BVOC emissions from litter along with decomposition process and will thus contribute to better understand the dynamics and sources of BVOC emission in Mediterranean pine forests.
We investigated the evolution of the BVOC emissions from the litter of Pinus halepensis during a 15‐month field decomposition experiment. High variability of emissions over decomposition was showed using online and offline measurements performed in vitro. Major compounds observed were monoterpenes, sesquiterpenes, and methanol, and their quantity and quality (terpenic composition) varied over sampling times with a high peak after 3 months of litter decomposition and, for a lesser extent, after 6 months for terpenic emission.
Databáze: OpenAIRE
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