Understanding the contribution of functional traits of individual fungal taxa to ecosystem functions under different land use scenarios (FunTrait)

了解不同土地利用情景下单个真菌类群的功能特征对生态系统功能的贡献（FunTrait）

• 批准号: 325088078
• 负责人: Dr. Stefan Hempel
• 金额: --
• 依托单位: Arbeitsgruppe Ökologie der Pflanzen
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/325088078?language=en
• 关键词: Understanding; contribution; functional; traits; individual

The functional significance of fungi in soil based ecosystem services, such as soil structure formation, nutrient cycling, and plant productivity, is widely acknowledged. However, a comprehensive link between individual fungal taxa and ecosystem services is currently impossible, due to a lack of knowledge of functional traits of these taxa. We propose to engage in large scale, high throughput culturing of saprobic fungi from the very intensive (VI) grassland plots of the Biodiversity Exploratories. After identification, we will screen these cultures for enzymatic activities related to the degradation of complex organic compounds and nutrient cycling in the soil. This trait information will then be linked and upscaled to molecular diversity assessments of fungi in all experimental grassland plots (EP) in order to obtain community weighted mean trait values. We will test whether these mean values can be used as predictors for ecosystem functions measured in situ in the field. Subsequently, we will analyze how redundant the fungal species diversity is in terms of ecosystem services and test whether this degree of redundancy varies along the land use gradient. Finally, by integrating community composition and trait data for a major part of the soil organism diversity in a collaborative work project, we will synthesize the knowledge on the importance of soil organism diversity and identity in ecosystem functioning. This will allow us to generate a comprehensive overview of the soil functions provided by a wider range of soil organisms and their vulnerability to land use intensification.

真菌在土壤结构形成、养分循环和植物生产力等土壤生态系统服务中的功能重要性得到了广泛的认可。然而，由于缺乏对单个真菌分类群的功能特征的了解，目前不可能在这些分类群与生态系统服务之间建立全面的联系。我们建议从生物多样性探索实验室非常密集的(VI)草原地块进行大规模、高产量的腐生真菌培养。鉴定后，我们将筛选这些培养物与土壤中复杂有机化合物的降解和养分循环有关的酶活性。然后，这些特征信息将与所有试验性草原地块(EP)中真菌的分子多样性评估相联系并进行升级，以获得群落加权平均特征值。我们将测试这些平均值是否可以用作现场测量的生态系统功能的预测因子。随后，我们将分析真菌物种多样性在生态系统服务方面的冗余度，并测试这种冗余度是否随着土地利用梯度的变化而变化。最后，通过在一个协作项目中集成土壤生物多样性的主要部分的群落组成和特征数据，我们将综合关于土壤生物多样性和特性在生态系统功能中的重要性的知识。这将使我们能够对更广泛的土壤生物提供的土壤功能及其对土地利用集约化的脆弱性进行全面的概述。