EGU2020-20289
https://doi.org/10.5194/egusphere-egu2020-20289
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Effects of prescribed burning on soil fertility and carbon dynamics in pre-littoral Mediterranean mountain pastures

José Manjón-Cabeza1, Mercedes Ibáñez1, Antonio Rodríguez1, Maria Josep Broncano2, Josepa Plaixats3, and Maria Teresa Sebastià1
José Manjón-Cabeza et al.
  • 1University of Lleida, School of Agrifood and Forestry Science and Engineering, Department of Horticulture, Fruit Growing Botany and Gardening, Spain (jose.manjon-cabeza@hbj.udl.cat)
  • 2Ecological and Forestry Applications Research Centre
  • 3Autonomous University of Barcelona, Department of Animal and Food Science,

Prescribed burning is a management tool used in the last years to prevent the invasion of woody vegetation in pastureland, decreasing the risk of extensive wildfires in vulnerable areas. Nevertheless, the effect of this practice in the soil is not yet fully understood, and more information is needed to ameliorate management practices. In order to understand how prescribed fire affect soil fertility, and the carbon (C) and nitrogen (N) cycles in pastures invaded by shrubs in Mediterranean areas, we carried out an experiment in Montseny, an acidic pre-littoral mountain range northern Barcelona (NE Iberian Peninsula). This area has experienced a decrease in traditional sheep stocks and therefore pastures endure strong shrub encroachment. We wanted to know: 1) what are the effects of prescribed burning on soil fertility in acidic Mediterranean pastures? and 2) are there legacy effects of the previous vegetation patches on the soil C and N cycles after prescribed burning? To answer those questions, we sampled soils before and after prescribed burning of a pasture heavily invaded by shrubs. Soils were sampled under six canopy types: Erica scoparia-dominated patches, Calluna vulgaris-dominated patches, Cytisus scoparius-dominated patches, Pteridium aquilinum-dominated patches and Cladonia-dominated biological crusts. The exact soil sampling point was recorded by a highly precise GPS, and each point resampled few days and six months after burning. As expected, soil fertility parameters varied with burning, including losses in soil phosphorus and nitrogen. In addition, several soil C and N parameters responded to the previous vegetation patches, including shifts in soil C and N concentration.

How to cite: Manjón-Cabeza, J., Ibáñez, M., Rodríguez, A., Broncano, M. J., Plaixats, J., and Sebastià, M. T.: Effects of prescribed burning on soil fertility and carbon dynamics in pre-littoral Mediterranean mountain pastures, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-20289, https://doi.org/10.5194/egusphere-egu2020-20289, 2020

Comments on the presentation

AC: Author Comment | CC: Community Comment | Report abuse

Presentation version 2 – uploaded on 06 May 2020 , no comments
Updated Version
Presentation version 1 – uploaded on 04 May 2020 , no comments