1. College of Environment and Planning Henan University Kaifeng 475004 China
2. Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions (Henan University) Ministry of Education Kaifeng 475004 China
3. Henan Key Laboratory of Integrated Air Pollution Control and Ecological Security Henan University Kaifeng 475004 China
4. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems South China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 China
5. Jigongshan National Nature Reserve Xinyang 464039 China