CRB: Granivores, Herbivores, and the Composition of Experimental Grass and Forb Communities

CRB：食草动物、食草动物以及实验草和杂草群落的组成

• 批准号: 9903873
• 负责人: Henry Howe
• 金额: $ 8.5万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-01-01 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9903873&HistoricalAwards=false
• 关键词: CRB; Granivores; Herbivores; Composition; Experimental

9903873HoweTallgrass prairie on fertile, well-watered soils represents North America's most endangered major ecosystem with much of it converted to agriculture. This study proposes to continue an experiment testing for the effects of birds, mammals and planting density on the succession and community composition of synthetic tallgrass communities. In this expanded study, experiments are planned that will test for indirect effects of the small vertebrates through competition and facilitation among plant species. Since early results demonstrated that the voles had dramatic impacts on the legume species, it is predicted that some interactions among plants may be mediated through soil nitrogen. This will be tested using path analysis to test for ongoing effects of herbivory and granivory and to test apart causes and consequences of plant-plant interactions that is being driven by the vertebrates. It is hoped that managers, conservationists and restorationists in management of the surviving tallgrass prairie remnants will use information garnered from this experiment.

9903873 HoweTallgrass草原肥沃，土壤水分充足，是北美最濒危的主要生态系统，其中大部分已转化为农业。本研究拟继续进行鸟类、哺乳动物和种植密度对人工高秆草群落演替和群落组成的影响试验。在这项扩大的研究中，计划进行实验，通过植物物种之间的竞争和促进来测试小型脊椎动物的间接影响。由于早期的研究结果表明，田鼠对豆科植物物种有显着的影响，它是预测，植物之间的一些相互作用可能是通过土壤氮介导的。这将使用路径分析进行测试，以测试食草动物和granivory的持续影响，并测试由脊椎动物驱动的植物-植物相互作用的原因和后果。人们希望管理者、自然资源保护者和生态学家在管理幸存的高草草原遗迹时能利用从这个实验中获得的信息。