@Article{Llusia_etal2021,
author="Llusia, Joan
and Asensio, Dolores
and Sardans, Jordi
and Filella, Iolanda
and Peguero, Guille
and Grau, Oriol
and Ogaya, Roma
and Gargallo-Garriga, Albert
and Verryckt, Lore T.
and Van Langenhove, Leandro
and Brechet, La{\"e}titia M.
and Courtois, Elodie A.
and Stahl, Cl{\'e}ment
and Janssens, Ivan A.
and Penuelas, Josep",
title="Contrasting nitrogen and phosphorus fertilization effects on soil terpene exchanges in a tropical forest",
journal="Science of the Total Environment",
year="2021",
publisher="Elsevier",
volume="802",
pages="149769",
abstract="Production, emission, and absorption of biogenic volatile organic compounds (BVOCs) in ecosystem soils and associated impacts of nutrient availability are unclear; thus, predictions of effects of global change on source-sink dynamic under increased atmospheric N deposition and nutrition imbalances are limited. Here, we report the dynamics of soil BVOCs under field conditions from two undisturbed tropical rainforests from French Guiana. We analyzed effects of experimental soil applications of nitrogen (N), phosphorus (P), and N + P on soil BVOC exchanges (in particular of total terpenes, monoterpenes, and sesquiterpenes), to determine source and sink dynamics between seasons (dry and wet) and elevations (upper and lower elevations corresponding to top of the hills (30 m high) and bottom of the valley). We identified 45 soil terpenoids compounds emitted to the atmosphere, comprising 26 monoterpenes and 19 sesquiterpenes; of these, it was possible to identify 13 and 7 compounds, respectively. Under ambient conditions, soils acted as sinks of these BVOCs, with greatest soil uptake recorded for sesquiterpenes at upper elevations during the wet season (-282 $\mu$g m-2 h-1). Fertilization shifted soils from a sink to source, with greatest levels of terpene emissions recorded at upper elevations during the wet season, following the addition of N (monoterpenes: 406 $\mu$g m-2 h-1) and P (sesquiterpenes: 210 $\mu$g m-2 h-1). Total soil terpene emission rates were negatively correlated with total atmospheric terpene concentrations. These results indicate likely shifts in tropical soils from sink to source of atmospheric terpenes under projected increases in N deposition under global change, with potential impacts on regional-scale atmospheric chemistry balance and ecosystem function.",
optnote="exported from refbase (http://php.ecofog.gf/refbase/show.php?record=1033), last updated on Wed, 20 Jul 2022 11:49:49 -0300",
doi="10.1016/j.scitotenv.2021.149769"
}