Funding for this research was provided by:
University of Valladolid and Banco Santander (Predoctoral Grant)
Mediterranean Regional Office of the European Forest Institute (Short Scientific Visit)
Ministerio de Economía y Competitividad (AGL2011-29701-C02-02, AGL2014-51964-C2-1-R)
Article History
Received: 22 December 2017
Accepted: 13 February 2019
First Online: 10 April 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.