大兴安岭林区的河谷洼地、山麓缓坡地带,乃至宽缓的分水岭岭背上,都有面积不等、程度不同的沼泽地,并堆积了厚约0.5—1米的泥炭层,成为我国一个重要的泥炭沼泽区,这里的沼泽类型多样,既有富营养型的苔草、苔草——小叶樟草本沼泽,也有贫营养型的泥炭藓沼泽,还有在国内难以见到的中——贫营养型木本沼泽,即兴安落叶松——杜香——泥炭藓沼泽和丛桦——苔草沼泽。沼泽分布受地形条件严格限制,依山傍水,多呈不连续的斑块 Daxinganling forest valley depression, foothill gentle slope belt, and even the broad watershed Ridge, have different sizes and degrees of wetlands, and the accumulation of about 0.5-1 meters thick peat layer, has become an important Peat swamp area, where the swamps of various types, both eutrophic Carex, Carex - Campylobacter swamp, but also the poor nutrient-rich peat moss marsh, but also difficult to see in the domestic - poor nutrition Type woody swamp, improvised larch - Du Xiang - peat bog moss and Cong birch - moss marsh. Marsh distribution by the terrain conditions are strictly limited, Yishanbangshui, mostly discontinuous plaques