Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Heterogeneous responses to ozone and nitrogen alter the species composition of Mediterranean annual pastures
Year:2016
Research Areas
  • Natural sciences and health sciences
Information
Abstract
Air pollution represents a threat to biodiversity throughout the world and particularly in the Mediterranean area, where high tropospheric ozone (O3) concentrations and atmospheric nitrogen (N) deposition are frequently recorded. Mediterranean annual pastures are among the most important ecosystems in southern Europe due to their high biodiversity and extension. Aiming to study the responses of these communities to the main atmospheric pollutants in the Mediterranean region, an experimental study was performed in an open-top chamber (OTC) facility. A mixture of six species representative of annual pastures was grown under field conditions inside the OTC. Plants were exposed for 39 days to four O3 treatments and three doses of N. The species responded heterogeneously to both factors. Legumes did not react to N but were very sensitive to O3: Trifolium species responded negatively, while Ornithopus responded positively, taking advantage of the greater sensitivity of clovers to O3. The grasses and the herb were more tolerant of O3 and grasses were the most responsive to N. Significant interactions between factors indicated a loss of effectiveness of N in O3-polluted atmospheres and an ability of O3 to counterbalance the damage induced by N input, but both effects were dependent on O3 and N levels. The inclusion of plant competition in the experimental design was necessary to reveal results that would otherwise be missed, such as the positive growth responses under elevated O3 levels. Surprisingly, competition within the legume family played the most important role in the overall response of the annual community to O3. Both tropospheric O3 and N deposition should be considered important drivers of the structure and biodiversity of Mediterranean annual pastures.
International
Si
JCR
Si
Title
Oecologia
ISBN
0029-8549
Impact factor JCR
3,093
Impact info
Datos JCR del año 2014
Volume
10.1007/s00442-016-3628-z
Journal number
From page
1
To page
13
Month
SIN MES
Ranking
Participants
  • Autor: Hector Calvete Sogo (UPM)
  • Autor: Ignacio Gonzalez Fernandez
  • Autor: Javier Sanz
  • Autor: Susana Elvira
  • Autor: Rocio Alonso
  • Autor: Hector Garcia Gomez (UPM)
  • Autor: Miguel Angel Ibañez Ruiz (UPM)
  • Autor: Victoria Bermejo Bermejo
Research Group, Departaments and Institutes related
  • Creador: Departamento: Economía Agraria, Estadística y Gestión de Empresas
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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