Growth response of two coexisting species to climate change in broadleaved Korean pine forests in Changbai Mountain, northeastern China.

In this paper,dendrochronology method was used to reveal the dynamic response way of different species爷radial growth to climate change. Group-species Pinus koraiensis and pioneer-species Populus davidiana were selected in Changbai Mountain of northeastern China. The results showed that radial growth of P. koraiensis was significantly positive with the temperature and precipitation in previous winter (P 0.05). Pioneer-species P. davidiana was significantly negative with precipitation in the end of current growing season. In the extreme year,warm and wet winter as well as warm growing season intensified the narrow ring formation of P. koraiensis. The ring-width of P. davidiana was controlled by precipitation in previous and temperature in current spring. The results added the evidence that there was specific response way of trees to climate factors. With the change of climate factors,the positive effect of spring precipitation on P. koraiensis and the limit function of minimum temperature on two species were enhanced. It may lead to the suitable region reduction of P. koraiensis in Changbai Mountain of northeastern China.