1. College of Geography and Environmental Science, Henan University, Kaifeng, China
2. Xinyang Academy of Ecological Research, Henan Dabieshan National Field Observation and Research Station of Forest Ecosystem, Kaifeng, China
3. Henan University, Henan Key Laboratory of Integrated Air Pollution Control and Ecological Security, Kaifeng, China
4. Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Henan University, Kaifeng, China