Funding for this research was provided by:
Helmholtz-Zentrum für Umweltforschung
National Natural Science Foundation of China (51708264)
Text and Data Mining valid from 2018-10-17
Received: 10 July 2018
Revised: 17 September 2018
Accepted: 8 October 2018
First Online: 17 October 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.