Plant nutrient responses

植物养分反应

• 批准号: 531337869
• 负责人: Privatdozentin Dr. Christiane Roscher
• 金额: --
• 依托单位: Department Physiologische Diversität
• 依托单位国家: 德国
• 项目类别: Research Units
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/531337869?language=en
• 关键词: Plant; nutrient; responses

Plant tissue nutrient concentrations and ratios are important predictors of ecosystem processes and ecological interactions. The overall objective of this project is to study the effects of plant diversity on the temporal dynamics of plant nutrient responses, including their stability as temporal long-term invariability, resistance during and recovery after environmental perturbations. The project is organized in three work packages: (1) We will analyze the time-series data of community-level elemental concentrations, ratios and stocks of carbon (C), nitrogen (N), phosphorus (P) and potassium (K) in plant aboveground biomass of the Main Experiment. We aim to identify the drivers underlying diversity effects on plant community nutrient responses and their temporal variability by incorporating data on changes in plant community composition, soil characteristics and environmental changes. (2) We will collect leaf material of all sown species in the plant communities of the Main Experiment to study specific-specific concentrations of C, N, P and K. Using these data, we intend to decompose the importance of plant community composition versus the importance of intraspecific variation in leaf nutrient concentrations for the community means and diversity of plant tissue elemental concentrations in the long-term biodiversity experiment, which cannot be disentangled alone with community-level data. (3) We will study the species-specific uptake of isotopic tracers (15N, 13C) and carbon and nitrogen concentrations in plant aboveground biomass during the drought and re-wetting phase of the ResCUE Experiment to assess how plant and functional trait diversity buffer against the decline in community-level C and N uptake during drought and promote increased community-level C and N uptake when plant communities recover during re-wetting. We will analyze how plant species assigned to different functional groups and distinguished by different functional traits related to drought resistance vary in their C and N uptake during the drought and re-wetting phase. At the community level, we will also measure concentrations of P and K in aboveground plant material in both phases of the ResCUE Experiment to directly evaluate how climate events influence plant diversity effects on community-level concentrations, ratios and pools of different nutrients.

植物组织养分浓度和比率是生态系统过程和生态相互作用的重要预测指标。该项目的总体目的是研究植物多样性对植物营养反应的时间动态的影响，包括它们作为时间长期不可分割性，在环境扰动后恢复性的稳定性。该项目由三个工作包进行组织：（1）我们将分析碳（C），氮（N），磷（P）和钾（K）在主要实验的植物中的碳（C），氮（N），磷（P）和钾（K）的时间序列数据。我们旨在通过纳入有关植物社区组成，土壤特征和环境变化的数据来确定对植物社区养分反应及其时间变异性的驱动因素及其时间变异性的影响。 （2）我们将收集主要实验植物群落中所有播种物种的叶子材料，以研究特异性浓度的C，N，P和K。使用这些数据，我们打算分解植物社区组成的重要性，而植物内养分中种内变异的重要性与植物元素浓度在植物元素浓度中的重要性，该植物元素浓度在植物元素的群体中，该植物元素浓度无法进行植物性元素的群体，该植物元素均不能在植物性元素中，该植物元素均无生物的生物生物效率，该植物元素均无作用的生物生物效率，该植物元素均无层面的生物效率，该植物元素均无作用的生物效率，该实验是在植物性群体中，该植物浓度是在植物性浓度的含量。 数据。 （3）我们将研究同位素示踪剂（15N，13C）的物种特异性吸收，以及在干旱和救援实验中重新润湿阶段的植物植物中的碳和氮浓度，以评估植物和功能性状性能多样性在社区级别的境地下降，并在培养过程中的培养过程中如何在社区中培养和培养社区中的培训中，并在培养过程中进行了培养，并在培养过程中进行了培养，并在培养过程中进行了培养，并在越来越多。我们将分析分配给不同功能组的植物物种，并在干旱和重新润湿阶段在其C和N摄取中以与干旱抗旱性相关的不同功能性状区分。在社区一级，我们还将在救援实验的两个阶段中测量地上植物材料中P和K的浓度，以直接评估气候事件如何影响植物多样性对不同营养素的浓度，比率和池的影响。