Response of Larix chinensis forest ecosystem to climate change based on BiomeBGC model and tree rings

In this paper,the Biome-BGC model was used to simulate net primary productivity（NPP）of the Larix chinensis forest ecosystem during 1960-2013.The relationship between the NPP value and climatic factors,as well as the response of Larix chinensis radial growth to climate change were analyzed.The results showed that the average NPP of Larix chinensis on the northern slope of Mt.Taibai was 305.33 g C m-2a-1and 320.71 g C m-2a-1on the southern slope during 1960-2013years.The NPP values of both the northern and southern slopes increased.The rate increase of the northern slope(0.47 g C m-2a-1)was lower than that of the southern slope(1.29 g C m-2a-1).However,the range of NPP fluctuation was larger at the lower limit of the distribution of Larix chinensis.The NPP value of Larix chinensis on the northern slope decreased gradually with the increase in altitude.On the northern slope,the NPP amplitude at low altitude was higher than that at high altitude,whereas the southern slope showed no obvious change.The simulated NP