• 责任者：Li Wei (Key Laboratory for Wetland Conservation and Vegetation Restoration ; Ministry of Environmental Protection ; Institute for Peat and Mire Research ; Northeast Normal University ; Changchun 130024 ; China) ; Bu Zhaojun
• 刊名：Journal of Mountain Research
• 出版年：2013
• 卷期：31(4)
• 页码：p.442-447
• issnNo：ISSN1008-2786
• isbnNo：CN51-1516/P

Sphagnum is the dominant and mainly peat-forming plant component in northern peatlands. The substan- tial function of carbon sequestration for peatlands is due to the slow decomposition of Sphagnum. Until now, we still know very little about the main factors that affect Sphagnum decomposition in Northern China under the current cli- mate change background. Along an altitudinal gradient, we selected Sphagnumfallax and S. palustre litter as ma- terials in two habitats hummocks and hollows of four peatlands, Jinchuan, Hani, Yuanchi and Chichi in the Chang- bai Mountains, to study the effects of warming namely altitudinal decrease, habitat and species on decomposition rate of Sphagnum litter. The results show that, slight warming promoted Sphagnum litter decomposition; the decom- position rate of S. fallax was higher than S. palustre; hollow habitats were beneficial to Sphagnum decomposition. Overall species namely intrinsic quality of litter was the main factor to affect Sphagnum decomposition. S. fallax with high nitrogen content and low C/N was more easily to decompose. Interaction between warming and species and between warming and habitat can change species and habitats effects on decomposition, and it may create a far- reaching impact on carbon sink function of peatlands.