About the Authors

Ramón Perea

Affiliation Departamento de Silvopascicultura, ETSI, Montes, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain

Martin Venturas

Affiliation Departamento de Silvopascicultura, ETSI, Montes, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain

Luis Gil

luis.gil@upm.es

Affiliation Departamento de Silvopascicultura, ETSI, Montes, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LG RP. Performed the experiments: RP MV. Analyzed the data: RP LG MV. Wrote the paper: RP LG MV. Some figures: MV.