Vegetation and its relation with climate conditions near the timberline of Beitai,the Xiaowutai Mts., Northern China Handicapping male-cheaters by stable mate relationship in yellow-bellied prinia, Prinia flaviventris REVIEW OF MODELLING THE DISTRIBUTION OF PLANT SPECIES Climatic Factors for Limiting Northward Distribution of Eight Temperate Tree Species in Eastern North America Vegetation-Climate Relationship and Its Application in the Division of Vegetation Zone in China Climate-based digital simulation on spatial distribution of vegetation——A case study in Inner Mongolia