Equipment: MRI: Track 1: Acquisition of an isotope ratio mass spectrometer for biogeochemical and ecological education and research in an era of global change

设备： MRI：轨道 1：采购同位素比质谱仪，用于全球变化时代的生物地球化学和生态教育和研究

• 批准号: 2320674
• 负责人: Alyson Santoro
• 金额: $ 63.77万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-10-01 至 2026-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2320674&HistoricalAwards=false
• 关键词: Equipment; MRI; Track; Acquisition; isotope

This award will expand the analytical capability of the University of California, Santa Barbara Marine Science Institute (MSI) to include advanced chemical analyses of the greenhouse gas nitrous oxide (N2O) and small organic molecules through the acquisition of a new stable isotope ratio mass spectrometer and three supporting peripheral instruments. Currently, these measurements can only be made in a small number of laboratories. The MSI Analytical Laboratory, where the new instrumentation will be housed, is a facility with a 45-year history of successful operation staffed by two full-time professional technicians. This acquisition will catalyze cross-department interactions and interdisciplinary environmental science by facilitating a space where faculty and students from across campus using similar methods can interact without being siloed by departments. UCSB is both an Hispanic-Serving Institution (HSI) and an Asian American, Native American and Pacific Islander-Serving Institution (AANAPISI), with several active undergraduate research initiatives that reflect this unique status. The instrumentation will contribute significantly to improving STEM education at both the undergraduate and graduate levels across campus and ensure that students are trained to be competitive in the global STEM workforce. UCSB leads two marine NSF Long-Term Ecological Research (LTER) programs: Santa Barbara Coastal (SBC) and Mo’orea Coral Reef (MCR). The new instrumentation will allow LTER researchers to tackle numerous questions at the leading edge of ecological and biogeochemical global change research. Through the SBC-LTER, researchers will use compound-specific isotope analyses (CSIA) of amino acids to further unravel kelp forest food webs by determining the sources of primary production supporting reefs. These measurements will also provide insights into how material flows, food web structure, and trophic cascades are impacted by fishing and long-term increases in non-native and southern-affinity species following ocean heat waves. Researchers with the MCR-LTER will use CSIA in amino acids to create improved spatial and temporal models of land-based runoff to better understand how anthropogenic nutrient inputs control reef dynamics. N2O isotopomer analysis in combination with 15N tracer experiments will allow tracking the sources of N2O, a powerful greenhouse gas, that are emitted to the atmosphere in coastal upwelling systems. Sulfur isotopes will enable ground-breaking research on marine organic matter sulfurization, which may contribute to carbon preservation and sequestration in the ocean. Hydrogen isotope capability will facilitate tracing the fate of cyanobacterial hydrocarbons using CSIA. Finally, in terrestrial aquatic ecosystems, researchers will quantify the degree to which organic matter degradation is conducted through microbial metabolism versus direct photooxidation.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该合同将扩大加州大学圣巴巴拉海洋科学研究所的分析能力，通过购置一台新的稳定同位素比质谱仪和三台辅助外围仪器，对温室气体一氧化二氮和小有机分子进行先进的化学分析。目前，这些测量只能在少数实验室进行。MSI分析实验室将安置新仪器，该实验室拥有45年的成功运营历史，由两名全职专业技术人员组成。此次收购将促进跨部门的互动和跨学科的环境科学，促进空间，教师和学生从校园使用类似的方法可以互动，而不是由部门孤立。UCSB既是一个西班牙裔服务机构（HSI）和亚裔美国人，美洲原住民和太平洋岛民服务机构（AANAPISI），有几个活跃的本科生研究计划，反映了这种独特的地位。该仪器将大大有助于改善整个校园的本科和研究生阶段的STEM教育，并确保学生经过培训，在全球STEM劳动力中具有竞争力。UCSB领导着两个海洋NSF长期生态研究（LTER）计划：圣巴巴拉海岸（SBC）和莫雷阿珊瑚礁（MCR）。新的仪器将使LTER研究人员能够解决生态和地球化学全球变化研究前沿的许多问题。通过SBC-LTER，研究人员将使用氨基酸的化合物特异性同位素分析（CSIA），通过确定支持珊瑚礁的初级生产来源，进一步解开海带森林食物网。这些测量还将深入了解物质流、食物网结构和营养级联如何受到海洋热浪后捕捞和非本地和南方物种长期增加的影响。MCR-LTER的研究人员将使用氨基酸中的CSIA来创建改进的陆基径流的空间和时间模型，以更好地了解人为营养物质输入如何控制珊瑚礁动态。N2 O同位素分析结合15 N示踪剂实验将允许跟踪N2 O的来源，N2 O是一种强大的温室气体，在沿海上升流系统中排放到大气中。硫同位素将使对海洋有机物硫化的突破性研究成为可能，这可能有助于海洋的碳保存和封存。氢同位素能力将有助于使用CSIA追踪蓝藻碳氢化合物的命运。最后，在陆地水生生态系统中，研究人员将量化有机物降解通过微生物代谢与直接光氧化进行的程度。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。