Universitat de Lleida
    • English
    • català
    • español
  • English 
    • English
    • català
    • español
  • Login
Repositori Obert UdL
View Item 
  •   Home
  • Recerca
  • Hortofructicultura, Botànica i Jardineria
  • Articles publicats (Hortofructicultura, Botànica i Jardineria)
  • View Item
  •   Home
  • Recerca
  • Hortofructicultura, Botànica i Jardineria
  • Articles publicats (Hortofructicultura, Botànica i Jardineria)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Phenology and plant functional type dominance drive CO2 exchange in seminatural grasslands in the Pyrenees

Thumbnail
View/Open
Postprint (755.3Kb)
Issue date
2020
Author
Ibañez, Mercedes
Altimir, Núria
Ribas Artola, Àngela
Eugster, Werner
Sebastià, Ma. T.
Suggested citation
Ibañez, Mercedes; Altimir, Núria; Ribas Artola, Àngela; Eugster, Werner; Sebastià, Ma. T.; . (2020) . Phenology and plant functional type dominance drive CO2 exchange in seminatural grasslands in the Pyrenees. The Journal of Agricultural Science, 2020, vol. 158, núm. 1-2, p. 3-14. https://doi.org/10.1017/S0021859620000179.
Impact


Web of Science logo    citations in Web of Science

Scopus logo    citations in Scopus

Google Scholar logo  Google Scholar
Share
Export to Mendeley
Metadata
Show full item record
Abstract
Understanding the mechanisms underlying net ecosystem CO2 exchange (NEE) in mountain grasslands is important to quantify their relevance in the global carbon budget. However, complex interactions between environmental variables and vegetation on NEE remain unclear; and there is a lack of empirical data, especially from the high elevations and the Mediterranean region. A chamber-based survey of CO2 exchange measurements was carried out in two climatically contrasted grasslands (montane v. subalpine) of the Pyrenees; assessing the relative contribution of phenology and environmental variables on CO2 exchange at the seasonal scale, and the influence of plant functional type dominance (grasses, forbs and legumes) on the NEE light response. Results show that phenology plays a crucial role as a CO2 exchange driver, suggesting a differential behaviour of the vegetation community depending on the environment. The subalpine grassland had a more delayed phenology compared to the montane, being more temperature than water constrained. However, temperature increased net CO2 uptake at a higher rate in the subalpine than in the montane grassland. During the peak biomass, productivity (+74%) and net CO2 uptake (NEE +48%) were higher in the subalpine grassland than in the montane grassland. The delayed phenology at the subalpine grassland reduced vegetation's sensitivity to summer dryness, and CO2 exchange fluxes were less constrained by low soil water content. The NEE light response suggested that legume dominated plots had higher net CO2 uptake per unit of biomass than grasses. Detailed information on phenology and vegetation composition is essential to understand elevation and climatic differences in CO2 exchange.
URI
http://hdl.handle.net/10459.1/69462
DOI
https://doi.org/10.1017/S0021859620000179
Is part of
The Journal of Agricultural Science, 2020, vol. 158, núm. 1-2, p. 3-14
European research projects
Collections
  • Publicacions de projectes de recerca del Plan Nacional [2661]
  • Articles publicats (Hortofructicultura, Botànica i Jardineria) [213]
  • Articles publicats (CTFC) [227]
  • Publicacions de projectes finançats per la Unió Europea [636]

Contact Us | Send Feedback | Legal Notice
© 2022 BiD. Universitat de Lleida
Metadata subjected to 
 

 

Browse

All of the repositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

Statistics

View Usage Statistics

D'interès

Política institucional d'accés obertDiposita les teves publicacionsDiposita dades de recercaSuport a la recerca

Contact Us | Send Feedback | Legal Notice
© 2022 BiD. Universitat de Lleida
Metadata subjected to