The Impact of Macrozooplankton on the Measurement of Inorganic and Organic Nitrogen Cycling in Marine Microbial Food Webs

大型浮游动物对海洋微生物食物网中无机和有机氮循环测量的影响

• 批准号: 9116251
• 负责人: Patricia Glibert
• 金额: $ 27.92万
• 依托单位: University of Maryland Center for Environmental Sciences
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1995-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9116251&HistoricalAwards=false
• 关键词: Impact; Macrozooplankton; Measurement; Inorganic; Organic

Although our understanding of the complexity of the microbial food web has increased tremendously over the past several years, there has been little appreciation to date of the effects of trophic dynamics on the regenration of nitrogen. Dr. Glibert's work to date leads us to believe that total nitrogen regeneration in a natural food web is greater than that contributed by the component popultions, and that this effect is a nonlinear function of macrozooplankton density. This hypothesis has important consequences for how we measure the regeneration of nitrogen, and implies that commonly-used size-fractionation techniques may lead to underestimates of total regeneration. If the magnitude of this bias is large, even if only under certian conditions, then our perspective of the balance between "new" and "regenerated" nitrogen may also be biased. In these studies Dr. Glibert and collaborators will use several newly-developed techniques to determine the magnitude of the effect of these interactions under a range of conditions and the major processes contributing to this effect. The significance of these studies lies in elucidating the complex role of macrozooplankton in controlling the regeneration of nitrogen and how their interactions with other components of the plankton food web regulate the flow of nitrogen.

尽管我们对微生物的复杂性的理解 在过去的几年里， 多年来，人们对这一问题的认识很少。 营养动态对氮素再生的影响。 格利伯特博士迄今为止的工作使我们相信， 天然食物网中的氮再生大于 这是由人口组成的， 影响是大型浮游动物密度的非线性函数。 这一假设对我们如何衡量 氮的再生，并意味着通常使用的 尺寸分级技术可能会导致低估 完全再生 如果这种偏差的幅度很大， 即使只是在某些条件下，那么我们对 “新的”和“再生的”氮之间的平衡也可 有偏见。 在这些研究中，Glibert博士和合作者将 使用几种新开发的技术来确定 在一定范围内，这些相互作用的影响程度 条件和主要过程有助于这种效果。 这些研究的意义在于阐明 大型浮游动物在控制 氮的再生以及它们与其他生物的相互作用 浮游生物食物网的组成部分调节着 氮气