SGER: Regulation of Metal Bioavailability in Floodplain Continuum by Carbon and Sulfur Cycling

在匈牙利Tisza河洪泛区的一个洪泛区，我们测量了污染物、微生物活动和群落结构的空间变异性，以寻找土壤微生物活动与重金属（Pb、Zn、Cu、Cd和As）的原位浓度在不同尺度上的关系，包括溶液和固相。随机模型将用于研究金属对植物的可利用性。在二零零零至零一年度的主要洪水期间，洪泛区上游水库的溢流曾不时向洪泛区排放重金属废物。来自佐治亚大学、加州大学河滨分校和俄克拉何马州立大学的研究人员正在与德布勒森大学和匈牙利科学院的同事合作，评估微生物群落和营养物质之间的相互作用如何调节金属动力学，并评估由此产生的长期生态影响。这项工作将特别为理解微生物组合和碳硫化合物在整个洪泛区土壤类型和氧化还原电位异质性背景下对金属动力学的作用提供数据。结果将纳入SREL和匈牙利外联方案，以支持各级的研究和教育。

0322042AdrianoThe spatial variabilities of contaminants, microbial activity, and community structure are being measured at a floodplain site on the Tisza River floodplain in Hungary in a search for relationships over a variety of scales between soil microbial activity and in situ concentrations of heavy metals (Pb, Zn, Cu, Cd & As), both in solution and as bound to solid phases. Stochastic modeling will be used to study metal availability to plants. The floodplain has experienced episodic discharges of heavy metal wastes from overflows from upstream storage reservoirs during major flood events in 2000-01. Researchers from the Univ. of Georgia, UC-Riverside and Oklahoma State are working in cooperation with colleagues from Debrecen Univ. and the Hungarian Academy of Science to assess how metal dynamics is being regulated by interactions between microbial communities and nutrients (C & S) and to evaluate resulting long-term ecological effects. The work would specifically generate data for understanding the role of microbial assemblages and carbon and sulfur compounds on metal dynamics in the context of heterogeneities in soil type and redox potential across the floodplain. Results will be integrated into the SREL and the Hungarian outreach programs to support research and education at all levels.