Resilience of grassland plant communities as influenced by root herbivores under different land use intensities

不同土地利用强度下根部食草动物对草原植物群落恢复力的影响

• 批准号: 107723990
• 负责人: Professor Dr. Florian Jeltsch
• 金额: --
• 依托单位: Arbeitsgruppe Funktionelle Biodiversität
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/107723990?language=en
• 关键词: Resilience; grassland; plant; communities; influenced

Ecosystem resilience is an essential factor underlying the sustained production of natural resources and ecosystem services in complex systems faced with uncertainty and surprise. Root herbivory can have a significant impact on grassland productivity and biodiversity under constant conditions. However, there are yet no studies focusing on non-equilibrium conditions such as disturbances, short-term stresses or nutrient pulses. Our study aims at assessing the role of root herbivory in plant community resilience after various disturbances and stresses under different land use intensities. We expect the strength and direction of the root herbivore impact on plant community resilience to depend on land use type and intensity. We will determine the root herbivore impact on plant community recovery in controlled greenhouse experiments and monitor plant and root herbivore abundance and community composition after disturbance/stress in field surveys. In addition, we will develop and apply process-based simulation models of both, root herbivores and plant communities. These models will be coupled to systematically investigate the role of plant-herbivore interactions for the resilience of grassland systems. The land use gradient of the Biodiversity Exploratories provides excellent conditions for investigating the role of plant-herbivore interactions for the resilience of relevant types of managed grasslands in Europe under a wide range of abiotic and biotic conditions. We believe that the combination of empirical field work, controlled greenhouse experiments, and ecological modeling provides the most suitable approach to elucidate how the impact of root herbivory on plant community resilience changes under different land use scenarios.

生态系统的复原力是在面临不确定性和突发性的复杂系统中持续生产自然资源和生态系统服务的一个基本因素。在恒定条件下，根系食草动物对草地生产力和生物多样性有显著影响。然而，目前还没有研究集中在非平衡条件，如干扰，短期应力或养分脉冲。本研究旨在评估不同土地利用强度下，根系植食性在植物群落遭受各种干扰和胁迫后恢复力中的作用。我们预计根草食动物对植物群落恢复力的影响的强度和方向取决于土地利用类型和强度。我们将确定根草食动物对植物群落恢复的影响，在受控温室实验和监测植物和根草食动物的丰度和群落组成后，干扰/应力在实地调查。此外，我们将开发和应用基于过程的模拟模型，根食草动物和植物群落。这些模型将被耦合到系统地研究植物-草食动物相互作用的草地系统的弹性的作用。生物多样性探索站的土地利用梯度为研究植物-草食动物相互作用对欧洲各种非生物和生物条件下相关类型管理草原的恢复力的作用提供了极好的条件。我们认为，经验性的实地工作，控制温室实验和生态模拟相结合，提供了最合适的方法来阐明根草食植物群落的弹性变化的影响下，不同的土地利用方案。