Response of element cycles in a tropical mountain rain forest to environmental and land-use change

热带山地雨林元素循环对环境和土地利用变化的响应

• 批准号: 36022684
• 负责人: Professor Dr. Wolfgang Wilcke
• 金额: --
• 依托单位: Institut für Geographie und Geoökologie (IFGG)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/36022684?language=en
• 关键词: Response; element; cycles; tropical; mountain

The north Andean forest is affected by climate-driven acid and base depositions and will experience increasing N input in the future. Based on our knowledge of element cycling in the Reserva Biologica San Francisco, we aim at developing scenarios of possible responses of the study forest to expected environmental change. We will evaluate the available data series and complete the parameterization of a catchment-based hydrologic model (CATFLOW). We will assume the joint change scenarios of the Research Unit. The developed scenarios will be validated by continuing the Long-term Ecosystem Study and the Nutrient Management Experiment (NUMEX). The Long-term Ecosystem Study was established in 1998. For >11 years, a unique data set of weekly records of all major water and element fluxes has been collected. In the interdisciplinary NUMEX experiment, established in 2007, we continuously add N, P, N+P, and Ca twice per year to native forest in a block design at ca. 2000 m a.s.l. to explore the forest response to low-level nutrient input. For the next phase, a joint 15N pulse chasing experiment will be conducted to further explore the fate of added N. We contribute by setting up a complete flux budget of the applied isotope label.

北安第斯森林受到气候驱动的酸和碱沉积的影响，并将在未来经历不断增加的N输入。根据我们的知识，在储备生物旧金山弗朗西斯科的元素循环，我们的目标是在开发的研究森林的可能响应的情况下，预期的环境变化。我们将评估可用的数据系列并完成基于流域的水文模型（CATFLOW）的参数化。我们将假设研究股的联合变化情景。将通过继续进行长期生态系统研究和养分管理实验来验证所制定的设想方案。长期生态系统研究于1998年成立。11年多来，收集了所有主要水和元素通量的每周记录的独特数据集。在2007年建立的跨学科NUMEX实验中，我们以块设计每年两次连续添加N，P，N+P和Ca到天然林中。海拔2000米探讨森林对低水平养分输入的响应。在下一阶段，将进行联合15N脉冲追踪实验，以进一步探索添加N的命运。我们的贡献，建立一个完整的流量预算的应用同位素标签。