Collaborative Research on Bloom Dynamics and Food Web Structure in the Ross Sea: Vertical Flux of Carbon and Nitrogen

罗斯海水华动力学和食物网结构的合作研究：碳和氮的垂直通量

• 批准号: 9317598
• 负责人: Vernon Asper
• 金额: $ 26.18万
• 依托单位: University of Southern Mississippi
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-01 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9317598&HistoricalAwards=false
• 关键词: Collaborative; Research; Bloom; Dynamics; Food

9317598 Asper The growing season for phytoplankton in polar oceans is short, but intense. There is an increasing body of evidence that in many Antarctic habitats, the most active period may be very early in the season, a period that has not been emphasized in previous investigations. This project is part of an interdisciplinary program that focuses on the dynamics of the spring phytoplankton bloom in a highly productive subsystem of the Antarctic, the Ross Sea. The overall program will test hypotheses related to the initiation of the phytoplankton bloom shortly after the onset of ice melt, the mechanisms controlling phytoplankton growth and productivity in spring, the implications and short-term fate of high productivity in spring, and the transition from spring to midsummer conditions. This component will focus on the collection of vertical flux samples which will be analyzed for carbon, nitrogen and total mass flux and also provided to the other investigators for their specific analyses. Profiles of the abundance of large aggregates in the water column using a non- contact photographic method will be made. These data will be used to complement other particle determinations, to investigate the role of these aggregates in particle flux and to determine the mechanisms of particle export as a function of season and phytoplankton species. The end result will be a better understanding of the bloom processes and significant contributions to the data base on aggregates and export mechanisms in this environment.

9317598阿斯珀极地海洋中浮游植物的生长季节很短，但很激烈。 越来越多的证据表明，在许多南极栖息地，最活跃的时期可能是季节的早期，这是以前的调查中没有强调的时期。 该项目是一个跨学科计划的一部分，该计划的重点是南极罗斯海一个高产子系统中春季浮游植物水华的动态。 整个计划将测试有关的假设开始后不久，冰融化的浮游植物水华，控制浮游植物生长和生产力的机制，在春季，高生产力的影响和短期的命运，从春季到盛夏的过渡条件。 这一部分将侧重于收集垂直通量样本，分析这些样本的碳、氮和总质量通量，并提供给其他调查人员进行具体分析。 将使用非接触式摄影方法制作水柱中大聚集体丰度的剖面图。 这些数据将被用来补充其他粒子的测定，调查这些聚集在粒子通量的作用，并确定作为季节和浮游植物物种的功能的粒子出口的机制。 最终的结果将是更好地了解开花过程，并在此环境中的聚合和出口机制的数据库的重大贡献。