U.S.-Sweden Cooperative Research: Microbial Ecology of Grasslands

这一为期三年的奖项支持新墨西哥州立大学的R.Peter Herman和瑞典农业科学大学的Anna Martensson在草原微生物生态方面的美国-瑞典合作研究。该奖项为位于沙漠草原上的Jornada LTER(长期生态研究)站点增加了国际维度，并允许与瑞典乌普萨拉附近的牧场进行比较研究。本研究的目的是研究：(1)与木本植物入侵草原相关的微生物群落结构和功能的变化；(2)豆科和非豆科植物之间氮素的转移以及菌根真菌在转移中的作用。调查人员将比较杜松和玫瑰灌木入侵草原和杂酚油入侵荒漠草原。他们还将研究与菌根介导的氮转移有关的问题。这个国际项目将两个长期的生态研究地点与两个独特的生态系统连接起来。它允许进行比较调查，并开发在美国和瑞典收集的长期数据集。

This three-year award supports U.S.-Sweden cooperative research on grassland microbial ecology between R. Peter Herman of New Mexico State University and Anna Martensson of the Swedish University of Agricultural Sciences. The award adds an international dimension to the Jornada LTER (Long-term Ecological Research) site on desert grasslands and allows for comparative research with pasture grasslands near Uppsala, Sweden. The objective of the research is to study: (1) changes in microbial community structure and function associated with woody plant invasion intograsslands; and (2) the transfer of nitrogen between legumes and non-legumes and the role that mycorrhizal fungi play in the transfer. The investigators will compare juniper and rose shrub invasions of pasture grasslands with creosote invasions of desert grasslands. They will also study questions related to mycorrhizae mediated nitrogen transfer. This international project connects two long-term ecological research sites with two distinctive ecosystems. It allows for comparative investigations and for the development of long-term data sets collected in the United States and Sweden.