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Volatilome of Aleppo Pine litter over decomposition process

Citation

Viros, Justine et al. (2022), Volatilome of Aleppo Pine litter over decomposition process, Dryad, Dataset, https://doi.org/10.5061/dryad.sf7m0cg5w

Abstract

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 on-line (PTR-ToF-MS) and off-line 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.h-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 non-terpenic 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.

Funding

FR ECCOREV, Award: LITTERVOC project

MISTRALS, Award: CORVOLIM project

Centre National de la Recherche Scientifique, Award: LITTERVOC project

FR ECCOREV, Award: LITTERVOC project

MISTRALS, Award: CORVOLIM project