Collaborative Research: Iron-light Co-limitation in the Deep Chlorophyll Maximum of Stratified Oceanic Regimes

合作研究：分层海洋区域深部叶绿素最大值的铁-光共同限制

• 批准号: 0550798
• 负责人: Zackary Johnson
• 金额: $ 12.64万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0550798&HistoricalAwards=false
• 关键词: Collaborative; Research; Iron; light; Co; Collaborative; Research; Iron; light; Co

Researchers from Scripps Institute of Oceanography, the University of Hawaii, and Skidaway Institute of Oceanography plan to test the hypothesis that iron-light co-limitation at the deep chlorophyll maxima (DCM) is a widespread feature of oceanic stratified euphotic zones, and an important control on phytoplankton community composition and size structure. Three different types of DCM will be investigated: mesotrophic, relatively shallow maxima, deeper, chlorophyll per cell based DCM characteristic of oligotrophic gyres, and the Prochlorococcus maximum found just below the oxic/suboxic boundary in the Eastern Tropical North Pacific. To attain their goals, the scientists will carry out the following tasks during the cruises: (1) characterize water column parameters including basic hydrography, nutrient distributions, iron concentration and speciation, phytoplankton community structure, and primary productivity and photosynthetic efficiency; (2) conduct co-limitation incubation experiments at the three types of DCMs; and (3) determine picoplankton cell division and grazing rates. As regards broader impacts, the researchers plan to recruit undergraduates from both the University of California-San Diego and from an historically black college or university such as Savannah State University via the Collaborations in Integrating Research and Education Program using Research Experience for Undergraduates supplemental funds. A science teacher from California and one from Georgia will be asked to participate in research cruises using supplemental funds from Research Experiences for Teachers. Both teachers will be expected to produce educational materials based on their field experiences. One graduate student from the University of California-San Diego, one from the University of Hawaii and one from Skidaway Institute of Oceanography will be trained and supported as part of this study.

Scripps海洋学研究所，夏威夷大学和Skidaway海洋学研究所的研究人员计划检验以下假设：深层叶绿素最大值（DCM）的铁光共限制是海洋分层的兴奋区域的广泛特征，并且对Phytoplankton社区组成和尺寸结构的重要控制。 将研究三种不同类型的DCM：中嗜性，相对较浅的最大值，较深，更深的叶绿素，每个细胞基于细胞的DCM的DCM特征的贫营养陀螺症，以及在东部热带北部太平洋的脂肪核心最大值。 为了实现自己的目标，科学家将在巡航过程中执行以下任务：（1）表征水柱参数，包括基本水文，营养分布，铁浓度和物种，浮游植物群落社区结构以及初级生产力以及光合作用效率； （2）在三种类型的DCMS上进行共限制孵育实验； （3）确定皮科普兰顿细胞分裂和放牧率。 关于更广泛的影响，研究人员计划通过加州大学迭戈大学以及历史悠久的黑人学院或萨凡纳州立大学等历史悠久的黑人学院招募本科生，该合作在整合研究和教育计划的合作，利用本科生补充资金的研究经验整合研究经验。 将要求来自加利福尼亚州的一名科学老师和佐治亚州的一名科学老师使用来自教师的研究经验的补充资金参加研究巡游。 两位老师都将根据他们的现场经验生产教育材料。 一名来自加利福尼亚大学迭戈分校的研究生，夏威夷大学的一名研究生，一名来自Skidaway海洋学研究所的研究生将作为本研究的一部分进行培训和支持。