**Author details**

Vanda Oliveira\* and Helena Pereira Forest Research Center, School of Agriculture, University of Lisbon, Lisbon, Portugal

\*Address all correspondence to: vandaoliveira@isa.ulisboa.pt

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
