Influence of nutrient stoichiometry on pelagic ecosystem dynamics in the Peru upwelling zone (B02)

营养化学计量对秘鲁上升流区中上层生态系统动态的影响（B02）

• 批准号: 58774940
• 金额: --
• 依托单位: GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/58774940?language=en
• 关键词: Influence; nutrient; stoichiometry; pelagic; ecosystem

Building on previous work on the interactions between oxygen minimum zone (OMZ)-influenced (low N:P) stoichiometry and ecosystem processes, in Phase 3 we propose to test new hypotheses about channelling of excess P into dissolved organic phosphorus, the relation between oligotrophy and diazotrophy, and the role of zooplankton stoichiometry. We will approach this by means of (1) a large-scale in-situ mesocosm experiment in the OMZ region off Peru, (2) determination of N2 fixation and key ecosystem and biogeochemical quantities during a cruise in the Peruvian OMZ, and (3) optimality-based ecosystem modelling in 0D, 1D, and global 3D settings.

基于以前的工作之间的相互作用的氧气最小区（OMZ）的影响（低N：P）的化学计量和生态系统过程中，在第3阶段，我们提出了测试新的假设，多余的P到溶解的有机磷，寡养和重氮营养之间的关系，以及浮游动物的化学计量的作用。我们将通过（1）在秘鲁外的OMZ区域进行大规模原位围隔实验，（2）在秘鲁OMZ巡航期间确定N2固定和关键生态系统和生物地球化学量，以及（3）在0D，1D和全球3D设置中基于最优性的生态系统建模。