CRB: The Effects of Barley Yellow Dwarf Virus on Introduced and Native Grass Species in California and Implications for Restoration

CRB：大麦黄矮病毒对加利福尼亚州引进和本土草种的影响及其恢复的意义

• 批准号: 9983373
• 负责人: Carolyn Malmstrom
• 金额: $ 29.9万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-01-15 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9983373&HistoricalAwards=false
• 关键词: CRB; Effects; Barley; Yellow; Dwarf

Malmstrom AbstractCRB: The effects of barley yellow dwarf virus on introduced and native grass species in California and implications for restorationOver the last two centuries, introduced plant species have become notable components of many American grasslands, sometimes altering grassland properties and reducing forage quality. The California grasslands are one system in which species composition has been profoundly transformed, in this case from a system dominated by native perennial grasses to one dominated by exotic annuals and now threatened by noxious weeds such as the yellow star thistle. Current efforts to improve the quality of California grasslands include a focus on restoring populations of native perennial grasses. However, restoring native grass populations has not always been straightforward. Evidence suggests that a common cereal virus, barley yellow dwarf virus (BYDV), is a widespread ecological agent in these grasslands and may play a notable role in influencing the population dynamics of the native and annual species. This work investigates interactions between native and introduced grasses and BYDV, and examines the hypothesis that BYDV places a stronger limitation on the persistence of native perennial populations than on those of the introduced annuals. The work will provide valuable insight into the role of plant viruses in natural communities, an area in which current understanding is poor. The information gained about BYDV in particular will be relevant to the many grasslands around the world in which BYDV is common. For California, this work will be the first investigation of a widespread ecological agent that has hitherto been overlooked in analysis of grassland and rangeland dynamics. For grassland and range managers, this work will help assess the trajectories of native grass populations under BYDV pressure and will help evaluate the feasibilit

Malmstrom AbstractCRB：大麦黄矮病毒对加州引进和本地草种的影响及其对牧草的影响在过去的两个世纪里，引进的植物物种已成为许多美国草地的重要组成部分，有时会改变草地特性并降低牧草质量。 加州草原是一个物种组成发生了深刻变化的系统，在这种情况下，从以本地多年生禾本科植物为主的系统变成了以外来一年生植物为主的系统，现在受到黄星星蓟等有毒杂草的威胁。 目前改善加州草地质量的努力包括重点恢复本地多年生牧草的种群。 然而，恢复原生草种群并不总是那么简单。有证据表明，一种常见的谷物病毒，大麦黄矮病毒（BYDV），是一个广泛的生态代理在这些草原，并可能发挥显着的作用，影响本地和一年生物种的种群动态。 这项工作调查本地和引进的草和BYDV之间的相互作用，并检查假设BYDV地方一个更强的本地多年生种群的持久性比那些引进的一年生植物的限制。 这项工作将为植物病毒在自然群落中的作用提供有价值的见解，这是一个目前了解不多的领域。 特别是获得的关于BYDV的信息将与BYDV常见的世界各地的许多草原相关。 对于加州，这项工作将是第一次调查一个广泛的生态代理人，迄今被忽视的草地和牧场动态分析。 对于草地和牧场管理者来说，这项工作将有助于评估在BYDV压力下本地草种群的轨迹，并将有助于评估