Nutrition and Growth of Large Marine Phytoplankton Species and Their Role in New Production

大型海洋浮游植物的营养和生长及其在新生产中的作用

• 批准号: 8818619
• 负责人: Joel Goldman
• 金额: $ 22.94万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-01-15 至 1991-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8818619&HistoricalAwards=false
• 关键词: Nutrition; Growth; Large; Marine; Phytoplankton

A major challenge in contemporary biological oceanography is to reconcile the opposing arguments that nutrient regeneration in the euphotic zone of the open ocean is highly efficient, while at the same time new production is fare greater than previously believed. One hypothesis is that two separate biological systems operate side by side: one composed of small microbes that regenerate most of the nutrients and contribute little to new production and another composed of large phytoplankton species that are ever present in background numbers and that grow rapidly in response to episodic inputs of nutrients at low light levels at the base of the euphotic zone and then sink out quickly. The former system is well studied, but the latter is not. The goal of this research is to study the growth and to gauge the role of large phytoplankton species in new production at very low irradiance. The results will provide a basis for assessing the potential for large phytoplankton species contributing greatly to new production while going unnoticed because of the episodic nature of their growth and sinking.

当代生物海洋学的一个主要挑战是 调和对立的论点，营养再生， 开阔海洋的真光层效率很高， 与此同时，新的产量比以前更高 相信。 一种假设是两种不同的生物 系统并行运作：一个由小微生物组成， 它们能再生大部分营养物质， 新的生产和另一个组成的大型浮游植物 在背景数字中存在的物种， 生长迅速，响应于低浓度营养素的间歇性输入， 在透光层底部的光线水平， 快 前一种系统研究得很好，但后一种系统 没有 这项研究的目的是研究生长， 衡量大型浮游植物物种在新生产中的作用 在非常低的辐射下。 研究结果将为 评估大型浮游植物物种的潜力 对新的生产做出了巨大的贡献， 因为它们的成长和衰落具有阶段性。