Use of Deep-Living Planktonic Foraminifera to Probe the Past Thermocline

利用深部浮游有孔虫探测过去的温跃层

• 批准号: 8912280
• 负责人: George Lohmann
• 金额: $ 10万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-15 至 1991-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8912280&HistoricalAwards=false
• 关键词: Use; Deep; Living; Planktonic; Foraminifera

The objective of the study is to exploit the modern day relationship of the size and shape of planktonic foraminifer G. truncatulinoides to the thermocline depth as a tool for reconstructing the structure and properties of the past thermocline of the Late Pleistocene. The thermocline depth has been shown to affect the life history of this species - as it shallows it alters the shell size frequency distribution and the rate ofshell development. Funds are provided for a pilot study of one year toconcentrate on plankton tow samples to further document the relationship of shape/size of G. truncatulinoides to thermocline dymanics. Once this relationship has been fully documented only then the downcore study of the Late Pleistocene sediments would be menaingful.

本研究的目的是利用浮游有孔虫G. truncatulinoides的大小和形状与温跃层深度的现代关系，作为重建晚更新世过去温跃层结构和性质的工具。温跃层深度已被证明会影响这一物种的生活史——当它变浅时，它会改变壳的大小、频率分布和壳的发育速度。为一项为期一年的试点研究提供资金，集中研究浮游生物拖带样本，以进一步记录G. truncatulinides的形状/大小与温跃层动力学的关系。一旦这种关系被充分记录下来，那么对晚更新世沉积物的下核研究将是有意义的。