Recovery mechanisms of above and belowground diversity and function of grassland, following reduction in intensity of land use: RecovFun

减少土地利用强度后草地地上和地下多样性和功能的恢复机制：RecovFun

• 批准号: 512303510
• 负责人: Dr. Ute Hamer
• 金额: --
• 依托单位: Institut für Landschaftsökologie
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/512303510?language=en
• 关键词: Recovery; mechanisms; above; belowground; diversity

We require efficient and cost-effective ecosystem restoration measures to halt the ongoing degradation of European grasslands' biodiversity, functions, and services through land-use intensification. Land-use extensification might be the directest restoration approach for European grasslands as it follows the idea that re-establishment of land-use intensities of a target reference grassland system will lead to the natural recovery of species-rich plant communities, their functions and services. However, the mechanisms, timeframes, and potential underlying extensification as restoration measure to combat grassland degradation are unclear, limiting the ability of policymakers to decide when its use as a tool for ecosystem restoration to improve grassland diversity, and function, and service provisioning is appropriate. The ReCovFun project proposes a novel holistic framework and novel approaches to fill these knowledge gaps: uncovering the potential and mechanisms of land-use extensification as a grassland restoration tool; and building scenarios and management guidelines of when extensification is suitable to restore grassland diversity, trophic interactions, functioning and service provisioning. To reach these aims one needs to overcome three challenges – the objectives of the RecovFun project: i) identification of extensification potential against a holistic set of restoration goals; ii) assessment of mechanisms underlying extensification effects on grassland multitrophic diversity, functions, and services; and iii) building of scenarios and management guidelines for optimal benefits of management extensification as a grassland restoration tool. Preliminary results highlight, that shifts in nutrient-cycling processes and associated interactions between plant and soil communities play a central role in shaping land-use effects on grassland ecosystems. The RecovFUN project hence uncovers extensification mechanisms by quantifying associated shifts in environmental conditions i.e., nutrient, light, and microsite availability, then assessing responses of plant and soil microbial communities, their functional traits, and interactions to these shifts, and identifying its consequences for soil nutrient cycling and biomass production. The novel multi-site experiments (REX, LUX) of land-use reduction in grasslands within the Biodiversity Exploratories (BE) project will serve as an ideal platform to assess extensification mechanisms and its potential as a grassland restoration tool. The major value-added by RecovFun to the outlined BE aims lies in i) contribution to the mechanistic understanding of relationships between land use, biodiversity, and functioning, ii) integration of investigated mechanisms into the socio-cultural and stakeholder-related context of grassland restoration, and iii) data synthesis opportunities by transferring established mechanisms for plant-soil interactions to other organism groups and associated functions and services.

我们需要有效和具有成本效益的生态系统恢复措施，以阻止欧洲草原的生物多样性、功能和服务因土地利用集约化而不断退化。土地利用扩展可能是欧洲草原最直接的恢复方法，因为它遵循的理念是，重新建立目标参考草地系统的土地利用强度将导致物种丰富的植物群落及其功能和服务的自然恢复。然而，作为对抗草地退化的恢复措施的机制、时间框架和潜在的潜在扩展尚不清楚，这限制了决策者决定何时将其作为生态系统恢复工具来改善草地多样性、功能和服务提供的能力。ReCovFun项目提出了一个全新的整体框架和新方法来填补这些知识空白：揭示土地利用扩展作为草地恢复工具的潜力和机制；并建立适宜扩展的情景和管理指南，以恢复草地的多样性、营养相互作用、功能和服务供应。为了达到这些目标，我们需要克服三个挑战——RecovFun项目的目标：1)根据一组整体恢复目标确定扩展潜力；Ii)草地多营养多样性、功能和服务的扩展效应机制评估；(3)构建管理扩展作为草地恢复工具的最佳效益情景和管理指南。初步结果表明，养分循环过程的变化以及植物和土壤群落之间相关的相互作用在形成草地生态系统的土地利用效应中起着核心作用。RecovFUN项目通过量化环境条件的相关变化，即养分、光照和微站点可用性，然后评估植物和土壤微生物群落的反应、它们的功能特征和对这些变化的相互作用，并确定其对土壤养分循环和生物量生产的影响，从而揭示了扩展机制。在生物多样性探索（BE）项目中，新的草地土地利用减少的多站点实验（REX， LUX）将为评估扩展机制及其作为草地恢复工具的潜力提供一个理想的平台。RecovFun对BE目标的主要价值在于：1)促进了对土地利用、生物多样性和功能之间关系的机制理解；2)将所调查的机制整合到草地恢复的社会文化和利益相关者相关背景中；3)通过将植物-土壤相互作用的既定机制转移到其他生物群体及其相关功能和服务中，提供了数据合成机会。