Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Soil organic matter dynamics after afforestation of mountain grasslands in both a Mediterranean and a temperate climate
Year:2016
Research Areas
  • Soil science,
  • Meditarranean forest
Information
Abstract
We studied the effect ofmountain grassland afforestation with conifer trees (Pinus sylvestris, Picea abies and Pinus cembra) on soil organic matter (SOM) cycling and carbon (C) isotopic composition in two contrasting climate areas using a regional approach. Seventeen paired sites (each containing at least 40 years prior afforested and grassland plots) were investigated in themountains of Central Spain and Western Austria. Topsoil CO2 effluxes were monitored under standard- ized conditions for sixmonths as a proxy for soil organic carbon (SOC) mineralisation. The bulk C and nitrogen (N) concentrations and their isotopic composition in the soil and in the plants were assessed. The soil C:N ratio was consistently greater after afforestation in both regions, which in Spain was caused by a significant decrease in N concentration. No consistent effect was found on mineralisation rates due to vegetation change. Afforestation produced a more consistent soil 13C enrichment in the Spanish than in the Austrian sites. Our work strongly suggests that increasing altitude in Mediterranean mountain grasslands alleviates water limitation, favouring both plant growth and SOM decomposition, and ultimately accelerating C cycling. In contrast, temperate grassland areas at high altitudes were associated with severe temperature limitations, which constrained SOM transformation processes. In spite of the impact of afforestation on soil biogeochem- ical processes, C concentrations were marginally affected. We therefore conclude that grassland conver- sion to coniferous forests does not enhanced C seques- trationin themineral soil, for at least 40 years after land- use change.
International
Si
JCR
Si
Title
Biogeochemistry
ISBN
0168-2563
Impact factor JCR
3,407
Impact info
Datos JCR del año 2015
Volume
131
10.1007/s10533-016-0278-5
Journal number
From page
267
To page
280
Month
SIN MES
Ranking
Participants
  • Autor: Carlos Ortiz Oñate (UPM)
  • Autor: Eduardo Vazquez Garcia (UPM)
  • Autor: Agustin Rubio Sanchez (UPM)
  • Autor: Marta Benito Capa (UPM)
  • Autor: Andreas Schindlbacher (Research and Training Centre for Forests, Natural Hazards and Landscape - BFW)
  • Autor: Robert Jandl (Research and Training Centre for Forests, Natural Hazards and Landscape - BFW)
  • Autor: Klaus Butterbach-Bahl (Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology)
  • Autor: Eugenio Díaz-Pinés López de los Mozos (Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Sistemas y Recursos Naturales
  • Departamento: Producción Agraria
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)