Marine Primary Producers >20uM from the Eastern Equatorial Pacific: Quantitative Estimates and Taxonomic Analysis for U.S. JGOFS

海洋初级生产者

• 批准号: 9115605
• 负责人: Greta Fryxell
• 金额: $ 19.36万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-10-15 至 1995-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115605&HistoricalAwards=false
• 关键词: Marine; Primary; Producers; & gt

The 20 um size fraction of marine phytoplankton sinks faster than smaller components and is an important size fraction to consider in global flux out of the euphotic zone through the oceanic water column to the sediments. In order to understand the abundance and biomass of the 20 um phytoplankton in the equatorial Pacific, multiple opening and closing net collections as well as water bottle samples will be studied through this program from the seasonal JGOFS EQPAC cruises. The priority will be to 2 seasonal time-series cruises within 20 north and south of the equator in the area known to have the greatest flux of material to the sediments. The netplankton will be concentrated from different strata by a multiple opening and closing new system deployed at depths chosen to complement a similar zooplankton sampling scheme as well as to concentrate phytoplankton from the upper surface layers and just below the euphotic zone in a depth region identified as very active biogeochemically. The seasonal survey cruises will allow meridional interpretations of the larger phytoplankton from water bottle samples and vertical net hauls. The larger diatoms and dinoflagellates are excellent indicators of the different water masses encountered, and the life histories and vertical zonation of the more heavily silicified diatom species found in equatorial water will be used to test a possible relationship between degree of silicification and growth-limiting conditions seen in higher latitude waters.

20微米大小的海洋浮游植物下沉得更快 比更小的组件，是一个重要的大小部分， 考虑全球通量出真光层通过 海洋水柱到沉积物。 为了解 20 μ m浮游植物的丰度和生物量 赤道太平洋，多次开闭净集 以及水瓶样品将通过这一研究 季节性JGOFS EQPAC巡航计划。优先事项将 是2个季节性的时间序列巡航20北和南 在已知有最大流量的地区的赤道 材料的沉积物。浮游生物会聚集在 从不同的阶层由多重开合新 系统部署在选定的深度，以补充类似的 浮游动物采样方案以及集中 浮游植物从上表面层和下面的 被确定为非常活跃的深度区域中的透光带 地球化学 季节性调查巡航将允许 水中大型浮游植物的空间解释 瓶子样品和垂直网牵引。 较大的硅藻和 腰鞭毛虫是不同水域的极好指示器 质量遇到的，和生活史和垂直地带性 在赤道地区发现的硅化程度更高的硅藻物种中， 水将被用来测试程度之间的可能关系 硅化和生长限制条件， 纬度沃茨。