The Carbon Isotopic Composition of Epibenthic Foraminifera: Carbon Flux and Drift Sedimentation

表底有孔虫碳同位素组成：碳通量和漂移沉积

• 批准号: 0221176
• 负责人: Daniel McCorkle
• 金额: $ 26.86万
• 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: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2005-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0221176&HistoricalAwards=false
• 关键词: Carbon; Isotopic; Composition; Epibenthic; Foraminifera

The proposal requests support to investigate the influence of surface ocean productivity on the carbon isotopic composition of the benthic foraminifer Cibicidoides wuellerstorfi. Analyses of live (stained) benthic foraminifers in 12 NE Atlantic drift sediment sites and 12 continental margin sites in the NW Atlantic to test the hypothesis that high accumulation rates and/or strong seasonality in phytodetritus flux results in anomalously low delta 13C values in C. wuellerstorfi. The NE Atlantic and NW Atlantic sites have high accumulation rates but the seasonal variation in phytodetritus flux is much higher in the NE Atlantic sites. The occurrence and frequency of benthic foraminifer "phytodetritus species" (Epistominella exigua and Alabaminella weddellensis ) in fossil assemblages will be tested as an indicator of "altered" C. wuellerstorfi carbon isotope values.

该提案要求支持调查表层海洋生产力对底栖有孔虫Cibicidoides wuellerstorfi碳同位素组成的影响。 分析了12个东北大西洋漂流沉积物地点和12个西北大西洋大陆边缘地点的活（染色）底栖有孔虫，以检验植物碎屑通量的高积累率和/或强季节性导致C. wuellerstorfi。 东北大西洋和西北大西洋的网站有很高的积累率，但在植物碎屑通量的季节变化是更高的东北大西洋网站。 化石组合中底栖有孔虫“植屑物种”（Epistominella exigua和Escheraminella weddellensis）的出现和频率将作为“改变的”C的指示器进行测试。wuellerstorfi碳同位素值。