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的分子​​记录的时间变化：评估沉积物陷阱颗粒中的高分辨率信号等。这项研究确定了烷酮产生的时间变异性以及用于评估海面温度（SST）变异的烷酮不饱和指数（UK37）。 在1990年8月至1993年2月期间，对加利福尼亚湾收集的沉积物陷阱材料进行了分析。这些样品提供了一个机会，为在UK37通过多种养分和浮游生物生产率周期（包括艾米利亚尼亚Huxleyi的Bloom时期）（包括CA的年度温度范围）测试UK37的波动。 15度C，并直接将分子温度值与测得的SST进行比较。 因此，拟议的研究将测试为太平洋水域，多个季节性振荡和较大温度范围的正常海洋条件定义的UK37的准确性。 该研究还评估了通过多个季节性周期的海洋浮游生物生物量的分子记录及其多样性。 将观察到的生物学特异性化合物观察到的浓度曲线与其他研究者对同一样品的同一微生物学研究获得的独立浮游生数进行比较。 因此，分子趋势将作为浮游生物人群动态的时间变异的信号进行测试。 分析将增强沉积物记录中环境和气候变化的分子信号。///