Structure and Survival Analysis of Tsuga chinensis Populations in Taoyuandong National Nature Reserve, Hunan Province Responses of the Tree-Ring of Abies faxoniana and Tsuga chinensis to Climate Factors in Sub-Alpine in Western Sichuan Photosynthesis and Antioxidant Defense Strategies in Overwintering Plants of Tsuga chinensis and Cyclobalanopsis stewardiana Metal element contents of Tsuga chinensis var. tchekiangensis in different community types and its relationship with soil nutrient factors in eastern China Applying BioMod for ModelEnsemble in Species Distributions: a Case Study for Tsuga chinensis in China Regenerative condition and analysis of spatial distribution pattern of two relic plants in Mao’ershan Mountain, China