Abstract:
It is crucial to understand the effects of climate change on the distribution of plant species for the conservation of biodiversity. Theeffects of climate change on the distribution of dove trees (Davidia involucrata Baill) in China were analyzed using the CART (classification and regression tree) niche model under climate change scenarios A1, A2, B1 and B2. The results showed that climate change in China will cause a large decrease inthe current suitable distribution region of dove trees, while it will cause an increase in new suitable or total suitable distribution regions of the plant. The suitable distribution region of dove trees will decrease over the period 1991-2100. It will decrease highest under the A1 scenario and lowest under the B1 scenario among the four climate change scenarios A1, A2, B1 and B2. Additionally, following climate change, some regions in the east, south, north, north-east andsouth-east of the current distribution region of dove trees will reduce, while new expanding distribution regions of the plant will expand towards the west or south-west of its current distribution region. Therefore, the current suitable distribution region of dove trees will be fragmented following climate change. Additionally, the effect of changing the annual mean air temperature in China on the distribution region of dove trees will be higher than that of changing annual precipitation in China.