植物相互作用是构建植被格局、决定生态系统功能的关键过程。环境变化背景下，长白山以泥炭藓为优势植物的许多泥炭地发生了植被演替，直叶金发藓优势度增加，植物相互作用构建该植被格局和影响碳库功能的机理尚不清楚。本项目以长白山哈泥泥炭地为研究地，以直叶金发藓和两种泥炭藓为研究物种，通过研究植被基质对苔藓植物孢子萌发与定居的影响以及植物相互作用对苔藓植物克隆扩展的影响，旨在验证植物相互作用驱动直叶金发藓种群扩展的假说，揭示植物相互作用调控长白山泥炭地植被格局的机理；通过研究植物相互作用对苔藓植物净初级生产力、植物残体分解及碳累积的影响,分析植被格局变化对泥炭地碳累积的影响；通过原位泥炭分解实验，综合多种表层泥炭测年技术，应用植物残体组成、碳累积及泥炭多酚含量等指标，构建植物相互作用强度及其衰减模型，探究植物相互作用调控长白山泥炭地碳库功能的机理，为泥炭地学和植物相互作用理论研究作出贡献。

Plant-plant interaction is a key process to construct vegetation pattern and affect ecosystem function. Under the background of environmental change,vegetation succession characterized by dominancy inrease by Polytrichum strictum happens in many peatlands dominated by Sphagnum in the Changbai Mountains region, and mechanism of plant-plant interaction mediates vegetation pattern and even carbon pool function is not clear. We select Hani Peatland in the Changbai Mountians as study site and P. strictum and two Sphagna as study species, by studying on the effect of vegetation substrate on spore germination and establishment and the effect of plant-plant interaction on clonal expansion of bryophytes, to test the hypothesis that plant-plant interaction driving the expansion of P. strictum and to uncover its mechanism to mediate vegetation pattern in Hani Peatland. By studying the effect of plant-plant interaction on net primary productivity and litter decomposition in bryophytes and carbon accumulation, analyze the effect of vegetation pattern change on carbon accumulation in the peatland. By studying on peat docomposition in situ, integrating several dating techniques, using the index including plant residue composition, carbon accumulation rate, polyphenol content, et al., we try to build plant-plant interaction intensity and its attenuation models, to look for the mechanism of plant-plant interaction mediating carbon pool function in peatlands of the Changbai Mountains and also make a contribution for theoretical research in peatland science and plant-plant interaction.