1Institute of Environmental Research, Shandong University, Jinan 250100, China
2School of Life Sciences, Shandong University, Jinan 250100, China
3Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University,
Jinan 250100, China
Submission date: 2015-12-28
Final revision date: 2016-02-20
Acceptance date: 2016-02-20
Publication date: 2016-05-25
Pol. J. Environ. Stud. 2016;25(3):1331–1337