Funding for this research was provided by:
National Natural Science Foundation of China (31770419, 31801976, 31971402)
university student innovation and entrepreneurship training programs of Jilin provincial (202010205057)
Natural Science Foundation of Changchun Normal University
Received: 28 August 2020
Accepted: 12 May 2021
First Online: 29 May 2021
: The present study complies with the current laws of China. Fieldwork was carried out under the permission from the Zuojia Nature Reserve, Jilin, China. Experimental procedures were permitted by National Animal Research Authority in Northeast Normal University (Approval Number: NENU-20080416) and the Forestry Bureau of Jilin Province of China (Approval Number: 178).
: Not applicable.
: The authors declare that they have no competing interests.