Scientific significance of the forest vegetation ecotone between Daxing'an Mountains and xiaoxing'an Mountains to study of Global climate change

摘要

Daxing'an Mountains and xiaoxing'an Mountains are the two regions of the highest latitudes in China. The Tem- perature increase is most obvious there in the last hundred years, compared with other regions of China. The forest vegetation ecotone between Daxing'an Mountains and xiaoxing'an Mountains is located between the latitude 48°and 53°N and longitude 123°and 128°E. This ecotone is of great importance in study of global climate change due to its transitional feature of broad- leaf-coniferous mixed forest and boreal forest. The location, geomorphology, climate, soil and vegetation types of the ecotone are introduced in this paper.