Long-term dynamics of dry valleys in the upper reaches of Mingjiang River, China Two-dimensional pattern analysis for dominant species and community in mountain meadow of Luya Mountain, Shanxi Province, China Spatial Distribution Patterns of Dominant Tree Species in Pinus tabulae f ormis-Quercus liaotungensis Forest in Luyashan Mountain,China The essential issues in aquatic ecological function regionalization The Regionalization Study on Vegetation of Liaoning Quantitative selection research on the evaluation indicators system for the ecological construction based on network analysis:a case study of Fujian