Current ozone levels threaten gross primary production and yield of Mediterranean annual pastures and nitrogen modulates the response

Calvete Sogo, Hector and Elvira, S. and Sanz, Javier and González-Fernández, I. and García Gómez, Hector and Sánchez Martín, Laura and Alonso, R. and Bermejo, V. (2014). Current ozone levels threaten gross primary production and yield of Mediterranean annual pastures and nitrogen modulates the response. "Atmospheric Environment", v. 95 ; pp. 197-206. ISSN 1352-2310. https://doi.org/10.1016/j.atmosenv.2014.05.073.

Description

Title: Current ozone levels threaten gross primary production and yield of Mediterranean annual pastures and nitrogen modulates the response
Author/s:
  • Calvete Sogo, Hector
  • Elvira, S.
  • Sanz, Javier
  • González-Fernández, I.
  • García Gómez, Hector
  • Sánchez Martín, Laura
  • Alonso, R.
  • Bermejo, V.
Item Type: Article
Título de Revista/Publicación: Atmospheric Environment
Date: 2014
ISSN: 1352-2310
Volume: 95
Subjects:
Faculty: E.U.I.T. Agrícolas (UPM)
Department: Química y Tecnología de Alimentos
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Pastures are among the most important ecosystems in Europe considering their biodiversity and dis- tribution area. However, their response to increasing tropospheric ozone (O 3 ) and nitrogen (N) deposi- tion, two of the main drivers of global change, is still uncertain. A new Open-Top Chamber (OTC) experiment was performed in central Spain, aiming to study annual pasture response to O 3 and N in close to natural growing conditions. A mixture of six species of three representative families was sowed in the fi eld. Plants were exposed for 40 days to four O 3 treatments: fi ltered air, non- fi ltered air (NFA) repro- ducing ambient levels and NFA supplemented with 20 and 40 nl l � 1 O 3 . Three N treatments were considered to reach the N integrated doses of “ background ” , þ 20 or þ 40 kg N ha � 1 . Ozone signi fi cantly reduced green and total aboveground biomass (maximum reduction 25%) and increased the senescent biomass (maximum increase 40%). Accordingly, O 3 decreased community Gross Primary Production due to both a global reduction of ecosystem CO 2 exchange and an increase of ecosystem respiration. Nitrogen could partially counterbalance O 3 effects on aboveground biomass when the levels of O 3 were moderate, but at the same time O 3 exposure reduced the fertilization effect of higher N availability. Therefore, O 3 must be considered as a stress factor for annual pastures in the Mediterranean areas.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainCSD2008-00040UnspecifiedUnspecifiedUnspecified
Government of SpainCGL2009-13188-C03-02UnspecifiedUnspecifiedUnspecified
FP7282910ECLAIRENATURAL ENVIRONMENT RESEARCH COUNCILEffects of Climate Change on Air Pollution Impacts and Response Strategies for European Ecosystems
Madrid Regional GovernmentS2009AGR-1630UnspecifiedUnspecifiedUnspecified

More information

Item ID: 35158
DC Identifier: http://oa.upm.es/35158/
OAI Identifier: oai:oa.upm.es:35158
DOI: 10.1016/j.atmosenv.2014.05.073
Official URL: https://www.sciencedirect.com/science/article/pii/S1352231014004397?via%3Dihub
Deposited by: Memoria Investigacion
Deposited on: 30 Sep 2015 10:25
Last Modified: 14 May 2019 11:37
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