Linking biological drivers and water transport to understand biodiversity effects on C and N storage in soils

将生物驱动因素和水运输联系起来，了解生物多样性对土壤碳和氮储存的影响

• 批准号: 289474429
• 负责人: Professor Dr. Gerd Gleixner
• 金额: --
• 依托单位: Institut für Geowissenschaften
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/289474429?language=en
• 关键词: Linking; biological; drivers; water; transport

The need for long term observations and experiments in biodiversity research has been emphasized to better understand biodiversity ecosystem functioning (BEF) relationships. This is particular true for slowly reacting systems, such as soil and even more when investigating processes driving element dynamics in sub soils. The proposed project will therefore investigate the effect of plant diversity and composition on organic matter changes in sub soils (deeper than 40 cm) ten years after establishing the experiment. We explore the coupling of C and N soil dynamics with the water cycle in order to reveal the underlying mechanisms governing plant diversity effects on nitrogen gains, losses and redistribution along a soil depth profile. Besides understanding deeper soil processes, this work will also contribute to understand why N accumulates in the topsoil of the non fertilized Jena Experiment. Finally, in close cooperation with the other newly formed subprojects, we will explore the positive BEF relationship for soil related processes to investigate not only the effect of plant diversity on element cycles but also the shift of the related drivers over time. The last point will be strongly supported by the insights derived from the Determinants of LongTerm Biodiversity Effects on Ecosystem Functioning (DeLT BEF) Experiment, where we determine soil carbon and nitrogen stocks and storage, and soil moisture patterns in soils having different soil history.

生物多样性研究需要长期的观测和实验，以更好地了解生物多样性与生态系统功能的关系。这是特别真实的缓慢反应系统，如土壤，甚至更多时，调查过程中驱动元素的动力学在地下。因此，拟议的项目将调查植物多样性和组成对试验建立十年后底土（40厘米以上）中有机物变化的影响。我们探讨耦合的C和N土壤动态与水循环，以揭示潜在的机制，植物多样性的影响氮的收益，损失和再分配沿着土壤深度剖面。除了了解更深层次的土壤过程，这项工作也将有助于了解为什么氮积累在非施肥耶拿实验的表土。最后，与其他新成立的子项目密切合作，我们将探索土壤相关过程的正BEF关系，不仅调查植物多样性对元素循环的影响，还调查相关驱动因素随时间的变化。最后一点将得到来自长期生物多样性对生态系统功能影响的决定因素（DeLT BEF）实验的有力支持，在该实验中，我们确定了具有不同土壤历史的土壤中的碳和氮储量和储存以及土壤水分模式。