Plant - soil fauna interactions: soil feedback mechanisms in grassland of different diversity

植物-土壤动物相互作用：不同多样性草地的土壤反馈机制

• 批准号: 172023813
• 负责人: Professor Dr. Nico Eisenhauer
• 金额: --
• 依托单位: Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/172023813?language=en
• 关键词: Plant; soil; fauna; interactions; feedback

Recent long-term studies in temperate grassland suggest that aboveground plant diversity loss leads to belowground extinction cascades and pronounced deterioration of fundamental belowground functions after a distinct time-lag. These findings suggest that the negative diversity loss – function relationship is driven to a large extent by soil feedback mechanisms. The main task of the present proposal is to disentangle the mechanisms underlying the plant diversity effects observed in the first eight years of the Jena Experiment by focusing on soil feedback mechanisms shaping the diversity – functioning relationship. Being involved and constituting fundamental parts in all major experiments the proposed project has five major goals: (1) Investigate effects of plant trait diversity as well as trait- and plant-specific impacts on soil microorganisms and soil fauna. (2) Investigate the role of belowground resources for the diversity – function relationship. (3) Follow the effects of plant species and functional group diversity on long-term changes in soil microorganisms and soil fauna. (4) Investigate changes in soil microorganisms and soil fauna of plant communities of different diversity invaded by plants. (5) Investigate the role of soil fauna for plant succession and aboveground multitrophic interactions in a plant diversity gradient. Overall, the project integrates belowground biota as response variables and driving forces of plant communities of different diversity and aims at a more comprehensive and mechanistic understanding of aboveground – belowground interrelationships.

近年来对温带草原的长期研究表明，地上植物多样性的丧失导致地下植物的级联灭绝，并在一定的时滞后导致地下基本功能的明显退化。这些结果表明，多样性损失-函数负关系在很大程度上是由土壤反馈机制驱动的。本研究的主要任务是通过关注土壤反馈机制形成多样性-功能关系，解开耶拿实验前8年观察到的植物多样性效应的机制。该项目涉及并构成了所有重大实验的基础部分，主要有五个目标：(1)研究植物性状多样性的影响以及性状和植物特异性对土壤微生物和土壤动物的影响。(2)探讨地下资源在多样性-功能关系中的作用。(3)跟踪植物物种和功能群多样性对土壤微生物和土壤动物长期变化的影响。(4)研究植物入侵不同多样性植物群落土壤微生物和土壤动物的变化。(5)研究土壤动物对植物演替和地上多营养相互作用在植物多样性梯度中的作用。总体而言，该项目将地下生物群作为不同多样性植物群落的响应变量和驱动力，旨在更全面、更机械地了解地上和地下的相互关系。