Leaf And Stem Functional Tarits Of Superior Woody Species And Their Influencing Factors In Northeast China's Forests

Plant functional traits' variation reflects the rules that how plants respond and adapt to the environment, and plants' evolution. In this study, leaf and stem C, N and P concentration, N:P, C:N ratio, SLA and stem tissue density were measured to analysis plant functional traits and their drivers among 52 superior woody species from 7 sites in Northeast China's Forest. The main results are as follows:(1) There were internal relations among leaf and stem functional traits, these correlations were consistent with previous studies. Each pair functional traits (e.g. leaf N concentration and stem N concentration) were respectively positively correlated. The plant functional traits varied among different research areas, life forms, forest types.(2)The Correlation relationships between leaf or stem functional traits and warmth index, annual rainfall, average low temperature in winter, annual temperature were consistent.(3)Explanatory of climate factors to plant functional traits:warmth index was the most important climate variable among four climate variables. The explanatory power of annual temperature was modest. The explanatory power of climate on SLA and leaf (stem) C concentration were stronger than other functional traits. The explanatory power of climate on leaf functional traits was stronger than on stem functional traits.(4)According to the study on influencing factors(climate, soil, species identity factors) of plant functional traits of 44 superior woody species(74 population) in Changbai mountain, Gehe, Liangshui, Maoer Mountain, most leaf and stem functional traits were modestly correlated with soil nutrients. General linear models were used to partition variation in leaf and stem functional traits, of the total variation, the explanatory power of species identity was strongest, next is climate, the explanatory power of soil nutrient is modest.