Beryllium Biochemistry in a Forested Ecosystem

大气中铍的高沉降率具有生物毒性，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，缅因州很可能很快也会经历类似的后果。一个国际专家研究小组将通过审查森林生态系统中的铍生物地球化学，对铍的命运和运输的生物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和国际合作旅行提供资金；捷克人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进行配对研究，开发进入、通过和流出流域的铍通量的化学时间序列，其中一个流域正在用硫酸铵人工酸化。研究评价了森林地表、流域和凋落物中总BE和7Be的通量。在酸性排放事件发生前后，正在对河流中的植被和沉积物进行评估，以评估临时交换池。

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.