Temporal Variations in Molecular Records of Sea Surface Temperatures & Plankton Productivity: Assessment of High Resolution Signals in Sediment Trap Particulates, etc.

海面温度分子记录的时间变化

• 批准号: 9303672
• 负责人: Simon Brassell
• 金额: $ 12.42万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-05-01 至 1995-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9303672&HistoricalAwards=false
• 关键词: Temporal; Variations; Molecular; Records; Sea

Temporal Variations of Molecular Records of Sea Surface Temperatures & Plankton Productivity: Assessment of High Resolution signals in Sediment Trap particulates, etc. This research is determining the temporal variability in alkenone production and in the alkenone unsaturation index (UK37) used in the evaluation of sea surface temperature (SST) variations. Analyses are being done on sediment trap materials collected in the Gulf of California at 2 week intervals during the period August 1990 to February 1993. The samples provide an opportunity to test fluctuations in UK37 through multiple nutrient and plankton productivity cycles (including bloom periods of Emiliania huxleyi) over an annual temperature range of ca. 15 Degree C and to directly compare the molecular temperature values with measured SST. Thus, the proposed study will test the veracity of UK37, as defined for normal marine conditions in Pacific waters, over multiple seasonal oscillations and through a broad temperature range. The investigation is also evaluating the molecular record of marine plankton biomass and their diversity through multiple seasonal cycles. The concentration profiles observed for biologically specific compounds will be compared with independent plankton counts obtained from concurrent micropaleontological studies on the same samples by other investigators. Thus, molecular trends will be tested as signals of temporal variability in plankton population dynamics. The analyses will enhance the of molecular signals of environmental and climatic change in the sediment record.//

海面温度和浮游生物生产力分子记录的时间变化：沉积物捕集器颗粒等中高分辨率信号的评估。这项研究正在确定用于评估海洋的烯酮生产和烯酮不饱和指数（UK37）的时间变化表面温度（SST）变化。 正在对 1990 年 8 月至 1993 年 2 月期间在加利福尼亚湾每隔两周收集的沉积物捕集材料进行分析。这些样本提供了一个机会，通过多个养分和浮游生物生产力周期（包括艾米利亚的水华期）来测试 UK37 的波动。 huxleyi）的年温度范围为约。 15 摄氏度并直接将分子温度值与测得的 SST 进行比较。 因此，拟议的研究将测试 UK37 的准确性，根据太平洋水域正常海洋条件的定义，在多个季节性振荡和广泛的温度范围内。 该调查还评估了海洋浮游生物生物量的分子记录及其在多个季节周期中的多样性。 观察到的生物特异性化合物的浓度分布将与其他研究人员对相同样品同时进行的微型古生物学研究获得的独立浮游生物计数进行比较。 因此，分子趋势将作为浮游生物种群动态的时间变异信号进行测试。 这些分析将增强沉积物记录中环境和气候变化的分子信号。//