Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Both altitude and vegetation affect temperature sensitivity of soil organic matter decomposition in Mediterranean high mountain soils
Year:2014
Research Areas
  • Agriculture,
  • Engineering
Information
Abstract
The aim of this work was to study the sensibility to warming of soil organic matter (SOM) decomposition in Mediterranean high mountain areas. Thus, we investigated the effects of temperature, C availability and vegetation in a Mediterranean high-mountain area in relation to SOM de composition atterns. Along an altitudinal gradient (from 2100 to 2380 m a.s.l.) in Central Spain mountains, we assessed the altitudinal shifts in soil organic C (SOC), soil nitrogen (N), dissolved organic carbon (DOC), microbial biomass C (MBC),microbial respiration, microbial respiration sensitivity to temperature (Q10) and C availability index (CAI). Furthermore, we tested the differences in SOM decomposition rates between grasslands and shrub vegetation. SOC, DOC, N content, MBC, microbial respiration and CAI decreased, while Q10 increased with increasing altitude. In the grassland, MBC and microbial respiration were positively correlated to SOM. Q10 was positively correlated to pH and negatively correlated to substrate-induced microbial respiration. Soils below shrubs showed lower microbial respiration rates, lower CAI, and higher Q10 than soils belowgrassland. However MBC, DOC and soil N contentwere higher below shrubs. The results suggest that a rise in temperature would enhance SOM decomposition rates in grasslands more dramatically at higher altitudes, since they are more sensitive to temperature increases. The SOC accretion observed below shrubs may be due to the lower respiration rate of soil microorganisms, possibly determined by lower C substrate availability below shrubs. This result suggests a higher recalcitrance of shrub litter compared to grassland litter. Nevertheless, SOC in shrubland may be released at a higher rate due to its higher temperature sensitivity
International
Si
JCR
Si
Title
Geoderma
ISBN
0016-7061
Impact factor JCR
2,509
Impact info
Volume
237-238
Journal number
From page
1
To page
8
Month
SIN MES
Ranking
Participants
  • Autor: Alba Gutiérrez-Girón
  • Autor: Eugenio Díaz-Pinés
  • Autor: Agustin Rubio Sanchez (UPM)
  • Autor: Rosario Gavilán
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Calidad de Suelos y Aplicaciones medioambientales
  • Departamento: Sistemas y Recursos Naturales
S2i 2021 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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