Resilience of invertebrate communities in grassland soils

RESOILIENCE以新出现的复原力问题为基础，将其作为制定可持续管理战略不可或缺的先决条件。最终目标是在最高水平的基础研究中填补关于土壤无脊椎动物群落的弹性和抵抗力的知识空白。主要目标是(1)探索创新途径，从机械上理解土壤群落对管理干扰的结构和功能反应，以及(2)深入了解在可变土壤环境中控制无脊椎动物群落组装的过程。着眼于DFG生物多样性探索实验室草原上发生的一系列管理强度，我们希望通过将我们在2009年和2011年BE工作期间采集的样本与2018年新收集的样本进行比较，来利用大规模长期方法的独特机会。复杂的野外和微观世界实验，挑出了群落从土壤干扰中恢复的关键方面，通过旨在具体说明、扩展和验证结果来补充这一方法。创新的RESOILIENCE概念框架的主要元素是基于特征的组装分析、干扰诱导组装过程的时间维度(连续组装)和暂态种群动态。确定的参数包括土壤动物的所有相关分类群(主要在物种一级)、食物网结构、消费者同位素特征、土壤过程(例如温室气体释放、C和N周转)以及微生物多样性和生物量(PLFA)。一个固有的目标是使用RESOILIENCE的新方法来改进统计工具和开发先进的衡量标准来分析和量化土壤生物群的恢复。

RESOILIENCE builds on the emerging issue of resilience as an indispensable prerequisite for developing sustainable management strategies. The ultimate goal is to fill the knowledge gap regarding the resilience and resistance of soil invertebrate communities at the highest level of basic research. Major aims are (1) to explore innovative routes toward a mechanistic understanding of the structural and functional response of edaphic communities to management disturbances, and (2) to obtain a deep insight into the processes controlling the assembly of invertebrate communities in variable soil environments. Focusing on the range of management intensities occurring at the grasslands of the DFG Biodiversity Exploratories, we want to exploit the unique opportunity of a large-scale long-term approach by comparing our samples taken during our BE work in 2009 and 2011 to samples newly collected in 2018. Sophisticated field and microcosm experiments, which single out crucial aspects of community recovery from soil disturbance, complement this approach by are aiming at specifying, extending and validating the results. Major elements of the innovative RESOILIENCE conceptual framework are trait-based assembly analyses, temporal dimensions of disturbance induced assembly processes (‘successional assembly’), and transient population dynamics. Parameters determined include all relevant taxa of the soil fauna (mostly at the species level), food web structure, consumer isotopic signatures, soil processes (e.g. GHG release, C and N turnover) as well as microbial diversity and biomass (PLFA). An inherent objective is to use the novel approach of RESOILIENCE for refining statistical tools and developing advanced metrics to analyse and quantify the recovery of soil biota.