Funding for this research was provided by:
EEA Grants (PL_05-0096)
Polish Ministry of Sciences and Higher Education statutory grants (DS 3404)
Institute of Nature Conservation PAS, statutory founds (III.1)
Article History
Received: 17 October 2017
Accepted: 23 March 2018
First Online: 30 March 2018
Compliance with ethical standards
:
: There are no conflicts of interest between the authors, the institution and fund donors.
: The paper has been prepared and submitted in accordance with the ethical standards of the Committee on Publication Ethics (COPE). Moreover, the methodology used in this study involved only a low degree of invasiveness, so no ethical permit was required.