Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (ComparCE-2, KE 2149/2-1)
Natural Environment Research Council (NE/P019749/1, NE/P019951/1)
Text and Data Mining valid from 2018-06-14
First Online: 14 June 2018
Compliance with Ethical Standards
: The authors state that they have no financial or personal relationships with any third party whose interests could be positively or negatively influenced by the article’s content.