**Author details**

Constanze Pietsch Zurich University of Applied Sciences (ZHAW), Institute of Natural Resource Sciences (IUNR), Wädenswil, Switzerland

\*Address all correspondence to: constanze.pietsch@zhaw.ch

© 2019 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.
