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.

该奖项将扩大加州大学圣巴巴拉分校海洋科学研究所(MSI)的分析能力，通过获得一台新的稳定同位素比质谱仪和三台辅助外围仪器，包括对温室气体一氧化二氮(N2O)和小有机分子的高级化学分析。目前，这些测量只能在少数实验室进行。MSI分析实验室是新仪器的所在地，是一个拥有45年成功运行历史的设施，配备了两名全职专业技术人员。这项收购将促进跨部门的互动和跨学科的环境科学，通过促进一个空间，在这个空间中，来自校园的教师和学生可以使用类似的方法进行互动，而不会被部门孤立。UCSB既是一个为拉美裔美国人服务的机构(HSI)，也是一个为亚裔美国人、土著美国人和太平洋岛民服务的机构(AANAPISI)，其几个活跃的本科生研究计划反映了这种独特的地位。该工具将大大有助于改善整个校园的本科生和研究生水平的STEM教育，并确保学生接受培训，使其在全球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)项目：圣巴巴拉海岸(SBC)和莫雷亚珊瑚礁(MCR)。新的仪器将使LTER研究人员能够解决生态和生物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定同位素分析(CSIA)，通过确定支持珊瑚礁的初级生产力的来源，进一步揭开海藻森林的食物网。这些测量还将深入了解捕捞和海洋热浪后非本土和南方亲和性物种的长期增加如何影响物质流动、食物网络结构和营养级联。MCR-LTER的研究人员将在氨基酸中使用CSIA来创建改进的陆地径流空间和时间模型，以更好地了解人为营养输入如何控制珊瑚礁动态。N2O同位素分析结合15N示踪剂实验将能够追踪沿海上升流系统排放到大气中的N2O的来源，这是一种强大的温室气体。硫同位素将使对海洋有机物质硫化的开创性研究成为可能，这可能有助于海洋中的碳保存和固存。氢同位素能力将有助于利用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通过微生物新陈代谢与直接光氧化进行降解的程度。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。