Development and application of CSI-AA biogeochemistry reconstructions in deep-sea corals to study decadal-centennial variability in the North Pacific

深海珊瑚 CSI-AA 生物地球化学重建的开发和应用，以研究北太平洋的十年至百年变化

• 批准号: 1635527
• 负责人: Thomas Guilderson
• 金额: $ 68.74万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-15 至 2022-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1635527&HistoricalAwards=false
• 关键词: Development; application; CSI; AA; biogeochemistry

Oceanic biological-ecosystem variability reflects dynamic physical processes in the ocean. This research aims to use newly-developed, state-of-the-art analyses of the chemical composition of deep-sea corals to examine how biogeochemical changes and shifts in plankton populations are related to environmental changes over the past few centuries. The project focuses on the Northeast Pacific Arc, which includes the Gulf of Alaska and the California Current System (CCS). Here instrumental records of sea surface temperature, sea level pressure, and coastal surface temperature reveal a consistent pattern of multi-decadal-scale changes in the North Pacific Basin. Funding supports training of one graduate student, one postdoctoral fellow, and offers research experiences for UCSC undergraduates, community college students, and high school students. The research team has partnered with the UCSC Seymour Marine Discovery Center to establish a new permanent exhibit highlighting deep-sea corals and climate-related ecosystem change. The central goal of this research is to couple high resolution records of past environments derived from deep-sea proteinaceous corals together with new compound-specific amino acid isotope (CSI-AA) measurements to create reconstructions of both biogeochemical change (e.g., source of nitrogen) and basic plankton ecosystem shifts crossing the Northeast Pacific Arc. Using sediment trap and live-collected samples, the research team will develop a more intimate understanding of, and establish explicit links between export production and the CSI-AA baseline values and patterns recorded in proteinaceous deep-sea corals. They will apply this knowledge to provide new insight into the underlying mechanisms of North East Pacific ecosystem change over the last 300-500 years. Overarching questions guiding this research are: 1) Are there structural, secular, long-term changes in NE Pacific Arc food webs beyond the Pacific Decadal Oscillation?, 2) If yes, how are these reflected in the community structure at the base of the food web?, and 3) How has community structure and sources of nitrate at the base of the food-web shifted in response to these changes?

海洋生物生态系统的变异性反映了海洋的动态物理过程。这项研究旨在利用新开发的、最先进的深海珊瑚化学成分分析方法来研究过去几个世纪中浮游生物种群的生物地球化学变化和变化与环境变化之间的关系。该项目重点关注东北太平洋弧，其中包括阿拉斯加湾和加利福尼亚海流系统（CCS）。这里海面温度、海平面压力和沿海表面温度的仪器记录揭示了北太平洋盆地多年代际尺度变化的一致模式。资金支持培训一名研究生、一名博士后，并为 UCSC 本科生、社区学院学生和高中生提供研究经验。该研究团队与加州大学圣迭戈分校西摩海洋探索中心合作，建立了一个新的永久性展览，重点展示深海珊瑚和与气候相关的生态系统变化。这项研究的中心目标是将来自深海蛋白质珊瑚的过去环境的高分辨率记录与新的化合物特异性氨基酸同位素（CSI-AA）测量结合起来，以重建横跨东北太平洋弧的生物地球化学变化（例如氮源）和基本浮游生物生态系统的变化。利用沉积物捕集器和现场采集的样本，研究小组将对出口生产与蛋白质深海珊瑚记录的 CSI-AA 基线值和模式有更深入的了解，并在它们之间建立明确的联系。他们将运用这些知识为过去 300-500 年东北太平洋生态系统变化的潜在机制提供新的见解。指导这项研究的首要问题是：1）太平洋年代际振荡之外的东北太平洋弧食物网是否存在结构性、长期的、长期的变化？2）如果有，这些变化如何反映在食物网底部的群落结构中？3）食物网底部的群落结构和硝酸盐来源如何随着这些变化而变化？

项目成果

Amino acid δ13C and δ15N patterns from sediment trap time series and deep-sea corals: Implications for biogeochemical and ecological reconstructions in paleoarchives

沉积物捕获时间序列和深海珊瑚的氨基酸 δ13C 和 δ15N 模式：对古档案中生物地球化学和生态重建的影响

• DOI: 10.1016/j.gca.2020.12.012
• 发表时间: 2021
• 期刊: Geochimica et Cosmochimica Acta
• 影响因子: 5
• 作者: Shen, Yuan;Guilderson, Thomas P.;Sherwood, Owen A.;Castro, Carmen G.;Chavez, Francisco P.;McCarthy, Matthew D.
• 通讯作者: McCarthy, Matthew D.

Calibrating amino acid δ 13 C and δ 15 N offsets between polyp and protein skeleton to develop proteinaceous deep-sea corals as paleoceanographic archives

校准息肉和蛋白质骨架之间的氨基酸 δ 13 C 和 δ 15 N 偏移，以开发蛋白质深海珊瑚作为古海洋档案

• DOI: 10.1016/j.gca.2017.09.048
• 发表时间: 2018
• 期刊: Geochimica et Cosmochimica Acta
• 影响因子: 5
• 作者: McMahon, Kelton W.;Williams, Branwen;Guilderson, Thomas P.;Glynn, Danielle S.;McCarthy, Matthew D.
• 通讯作者: McCarthy, Matthew D.

Investigating preservation of stable isotope ratios in subfossil deep-sea proteinaceous coral skeletons as paleo-recorders of biogeochemical information over multimillennial timescales

研究亚化石深海蛋白质珊瑚骨骼中稳定同位素比率的保存，作为数千年时间尺度生物地球化学信息的古记录器

• DOI: 10.1016/j.gca.2022.09.023
• 发表时间: 2022
• 期刊: Geochimica et Cosmochimica Acta
• 影响因子: 5
• 作者: Glynn, Danielle S.;McMahon, Kelton W.;Sherwood, Owen A.;Guilderson, Thomas P.;McCarthy, Matthew D.
• 通讯作者: McCarthy, Matthew D.