Beryllium Biochemistry in a Forested Ecosystem

森林生态系统中的铍生物化学

• 批准号: 9725705
• 负责人: Stephen Norton
• 金额: $ 6万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-03-01 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725705&HistoricalAwards=false
• 关键词: Beryllium; Biochemistry; Forested; Ecosystem

9725705 Norton High rates of atmospheric deposition of beryllium are toxic biologically and are exacerbated by synergistic interaction with aluminum. The Czech Republic is experiencing growing problems, and similar consequences may well soon be experienced in Maine. An expert international research team would pursue parallel pilot studies into the biogeochemical controls on Be fate and transport by examining beryllium biogeochemistry in forested ecosystems. This project funds the work in Maine and travel for international collaboration; the Czechs are supporting the work in their country. The plan for the pilot study is to develop chemical time series for beryllium fluxes into, through, and out of watersheds in a paired study in the Bear Brook Watershed where one watersheds is being artificially acidified with ammonium sulfate. The study evaluates the fluxes of total BE and 7Be at the forest floor, leaving the watersheds, and in litter fall. Be in stream vegetation and sediment is being evaluated before and after acidic discharge events to assess temporary exchangeable pools.

小行星9725705 铍在大气中的高沉积率具有生物毒性，并因与铝的协同作用而加剧。 捷克共和国正在经历越来越多的问题，缅因州很可能很快就会经历类似的后果。 一个国际专家研究小组将通过审查森林生态系统中铍的地球化学作用，对铍的归宿和迁移的地球化学控制进行平行的试点研究。 该项目为缅因州的工作提供资金，并为国际合作提供旅行;捷克人正在支持他们国家的工作。 试点研究的计划是，在贝尔布鲁克流域的一个流域正在用硫酸铵人工酸化的配对研究中，为铍流入、通过和流出流域制定化学时间序列。 这项研究评估了总BE和7 Be在森林地面的通量，离开流域，并在凋落物。 在酸性排放事件之前和之后，正在评估溪流植被和沉积物中的Be，以评估临时可交换池。