Funding for this research was provided by:
Alexander S. Onassis Public Benefit Foundation (no number)
"Heracleitus II" Research Funding Programme of the EU Social Fund and Greek national funds (no number)
Text and Data Mining valid from 2018-02-17
Received: 15 July 2017
Revised: 21 November 2017
Accepted: 7 January 2018
First Online: 17 February 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities and are mentioned in the acknowledgements, if applicable. This study has been approved by the Greek Ministry of Education, Lifelong Learning and Religious Affairs, through the acceptance of a Ph.D. project proposal. The locations studied are not privately owned nor protected in any way.