Zooplankton Variability and Particulate Fluxes at Station ALOHA: A Contribution to the Hawaii Ocean Time-Series (HOT)Program

该项目的总体目标是促进 对海洋中随时间变化的地球化学通量的理解 通过增加浮游动物采样组件， 夏威夷海洋时间序列（HOT）计划。前三年 该项目的沉积物收集器数据显示， 年际模式的输出通量，不能充分 这可以用初级生产力的同时变化来解释。以来 大型浮游动物和微浮游生物参与了 从地表沃茨中产生的有机物质 巨大的，快速下沉的粪便碎片和活跃的垂直 迁移，我们建议利用这个机会来测试 假设观察到的季节和年际变化， 沉积物捕获通量与发生的模式有关， 浮游动物研究计划将包括：（1）确定 浮游动物群落生物量结构由干重， 碳和氮分析的大小分级网收集; (2)估计移徙的相对幅度， 非洄游性浮游动物的昼夜比较 渔获量：（3）评估浮游动物作用的相对变化 作为初级生产者的直接消费者， 分析;和（4）估计，从微观分析，模式 浮游动物排泄物对出口的直接贡献 通量

The general objective of this project is to contribute to the understanding of time-varying biogeochemical fluxes in the oceanic subtropical Pacific by adding a zooplankton sampling component to the Hawaii Ocean Time-series (HOT) Program. The first three years of sediment trap data from this Program have revealed seasonal and interannual patterns in export fluxes that cannot be adequately explained by concurrent variations in primary productivity. Since large zooplankton and micronekton are implicated in the export of organic material from surface waters by virtue of their production of large, rapidly sinking fecal debris and active vertical migrations, we propose to use this opportunity to test the hypothesis that observed seasonal and interannual variability in sediment trap flux are related to patterns in the occurrence of zooplankton. The research program will include: (1) determining the community biomass structure of zooplankton from dry weights, carbon, and nitrogen analyses of size-fractionated net collections; (2) estimating the relative magnitudes of migrating and nonmigrating zooplankton from comparison of day- and night-time catches: (3) assessing relative changes in the role of zooplankton as direct consumers of primary producers from bulk gut fluorescence analyses; and (4) estimating, from microscopical analyses, patterns in the direct contribution of zooplankton fecal material to export flux.