泥炭沼泽植物功能多样性与生态系统功能关系及机理研究

项目名称： 泥炭沼泽植物功能多样性与生态系统功能关系及机理研究

项目编号： No.31470018

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 生物科学

项目作者： 王平

作者单位： 东北师范大学

项目金额： 30万元

中文摘要： 本项目拟以我国东北山地草本泥炭沼泽生态系统为实验对象，选择不同环境条件下的多种群落类型，研究植物功能多样性与生态系统功能（群落生产力和枯落物分解）的关系。该项目拟确定影响泥炭沼泽生态系统功能的植物功能多样性指标；确定质量比假说和多样性假说在泥炭沼泽生态系统中的适用条件；从功能多样性角度丰富生物多样性-生态系统功能关系理论。该项目的研究工作有助于深入认识生物多样性-生态系统功能关系及作用机制，推动多样性理论和群落构建理论等群落生态学的理论研究。此外，泥炭沼泽群落植物功能多样性与生态系统功能关系及机理研究，对阐明和预测植物如何通过性状组合，直接和间接驱动泥炭沼泽生态系统功能响应全球气候和土地利用方式变化具有重要意义，也对管理和恢复退化沼泽植被等方面起到积极的实践指导作用。

中文关键词： 群落结构；物种多样性；结构方程模型；功能性状；质量比假说

英文摘要： This project will be conducted in herbaceous communities distributed in mountain peatlands of northeastern China. The relationship of plant functional diversity and ecosystem function (productivity and litter decomposition) of herbaceous peatlands will be determined among different types of peatland communities in various environments. The functional diversity indices (functional richness, functional evenness and functional divergence) will be calculated based on the species richness and 11 plant traits in each community, in which the productivity (aboveground, belowground and total) and litter decomposition rate (weight loss and carbon, nitrogen, phosphorus) will be measured in 2 or 3 continuous years. The water level and temperature will be automatically recorded by instruments, and nutrients of water and soil will be collected to analyze the effect of ibiotic factors on the functional diversities, ecosystem functions and their relationships. The aims of this project are (1) to determine whether the functional diversity could explain more variance of ecosystem function than species diversity in peatland ecosystem; (2) to try to clarify whether the application of mass ratio hypothesis and diversity hypothesis in peatland ecosystem is affected by the heterogeneity of environment and/or dominant species among d

英文关键词： community structure；species diversity；structural equation modeling；functional trait；mass ratio hypothesis