TY  - JOUR
AU  - Llusia, Joan
AU  - Asensio, Dolores
AU  - Sardans, Jordi
AU  - Filella, Iolanda
AU  - Peguero, Guille
AU  - Grau, Oriol
AU  - Ogaya, Roma
AU  - Gargallo-Garriga, Albert
AU  - Verryckt, Lore T.
AU  - Van Langenhove, Leandro
AU  - Brechet, Laëtitia M.
AU  - Courtois, Elodie A.
AU  - Stahl, Clément
AU  - Janssens, Ivan A.
AU  - Penuelas, Josep
PY  - 2021//
TI  - Contrasting nitrogen and phosphorus fertilization effects on soil terpene exchanges in a tropical forest
JO  - Science of the Total Environment
SP  - 149769
VL  - 802
PB  - Elsevier
N2  - 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 μg 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 μg m-2 h-1) and P (sesquiterpenes: 210 μg 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.
UR  - http://dx.doi.org/10.1016/j.scitotenv.2021.149769
N1  - exported from refbase (http://php.ecofog.gf/refbase/show.php?record=1033), last updated on Wed, 20 Jul 2022 11:49:49 -0300
ID  - Llusia_etal2021
ER  -