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Seasonal and diurnal variations of plant isoprenoid emissions from two dominant species in Mediterranean shrubland and forest submitted to experimental drought
Mu, Zhaobin (Centre de Recerca Ecològica i Aplicacions Forestals)
Llusià Benet, Joan (Centre de Recerca Ecològica i Aplicacions Forestals)
Liu, Daijun (Centre de Recerca Ecològica i Aplicacions Forestals)
Ogaya Inurrigarro, Romà (Centre de Recerca Ecològica i Aplicacions Forestals)
Asensio Abella, Ma. Dolores (Centre de Recerca Ecològica i Aplicacions Forestals)
Zhang, Chao (Centre de Recerca Ecològica i Aplicacions Forestals)
Peñuelas, Josep (Centre de Recerca Ecològica i Aplicacions Forestals)

Date: 2018
Abstract: We tested the effect of increasing drought conditions in the Mediterranean Basin on isoprenoid emissions for the coming decades by analyzing their effect experimentally on the dominant Mediterranean species Erica multiflora in a Garraf shrubland and Quercus ilex in a Prades forest in Catalonia (Spain). Drought was simulated in Garraf using automatically sliding curtains to decrease the amount of soil moisture by 5% and in Prades by partial rainfall exclusion and runoff exclusion for a 25% decrease. We measured photosynthetic rates (A), stomatal conductance (gs) and rates of isoprenoid emission in the morning and at midday for four seasons and determined the relationship of emission rates with environmental conditions. Terpenes were emitted by both species, but only E. multiflora emitted isoprene. α-Pinene and limonene were the most abundant terpenes. Isoprenoid emissions increased with air temperature and generally decreased as the amount of soil moisture increased. The results of this study suggest that higher isoprenoid emissions can be expected in the warmer and drier conditions predicted for the coming decades in the Mediterranean region.
Note: Número d'acord de subvenció EC/FP7/610028
Note: Número d'acord de subvenció MINECO/CGL2016-79835-P
Note: Número d'acord de subvenció AGAUR/2014/SGR-274
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Language: Anglès.
Document: article ; recerca ; acceptedVersion
Subject: Mediterranean ecosystems ; Experimental drought ; Seasonal variations ; Diurnal variations ; BVOC emissions ; Isoprenoids ; Erica multiflora ; Quercus ilex
Published in: Atmospheric environment, Vol. 191 (Oct. 2018) , p. 105-115, ISSN 1352-2310

DOI: 10.1016/j.atmosenv.2018.08.010


Available from: 2020-10-30
Postprint

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
Articles > Research articles
Articles > Published articles

 Record created 2018-12-05, last modified 2019-01-01



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