Grassland Community Coalescence and Diversity Across Gradients of Nitrogen Eutrophication: the Interplay of Species Pools, Niche Determinism and Neutral Processes

氮富营养化梯度下的草原群落合并和多样性：物种库、生态位决定论和中性过程的相互作用

• 批准号: 0614488
• 负责人: Bryan Foster
• 金额: --
• 依托单位: University of Kansas Center for Research Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0614488&HistoricalAwards=false
• 关键词: Grassland; Community; Coalescence; Diversity; Across

Understanding factors that regulate the composition and diversity of communities is a key aim in ecology, but is also necessary to anticipate and mediate impacts of environmental change on ecosystems. A long-term field experiment will be established to investigate the role of seed availability, local ecological interactions and chance factors in governing the dynamics of grassland communities along gradients of nitrogen fertilization. Experimental communities will be planted to establish a variety of initial conditions with respect to species diversity, composition and abundance. Once established, these communities will be exposed to varying levels of nitrogen fertilization to evaluate the extent to which fates of species and changes in the community are predictable based upon functional traits and initial population sizes of species. The project will contribute to understanding of community formation along gradients of nitrogen availability, but also yield information applicable to grassland management and restoration. This project will contribute to education and training of female graduate students and undergraduates from University of Kansas (KU) and Haskell Indian Nations University. Minority students will present at meetings of the Ecological Society and the Society for Advancement of Chicanos and Native Americans. The project will be integrated into an existing public outreach program run by the KU Field Station.

了解调节社区组成和多样性的因素是生态学的关键目的，但对于预测和调解环境变化对生态系统的影响也是必要的。将建立一个长期的现场实验，以研究种子可用性，局部生态相互作用和机会因素在管理氮肥梯度沿草地群落动态方面的作用。将种植实验性群落，以建立有关物种多样性，组成和丰度的各种初始条件。建立后，这些社区将暴露于不同水平的氮肥，以评估基于功能性状和物种的初始种群规模，物种的命运和社区变化是可以预测的。该项目将有助于了解沿氮的可用性梯度的社区形成，但也会产生适用于草地管理和恢复的信息。该项目将有助于堪萨斯大学（KU）和Haskell印度国家大学的女研究生和本科生的教育和培训。少数族裔学生将在生态学会和奇卡诺斯和美洲原住民促进协会的会议上介绍。该项目将集成到由KU现场站开设的现有公共外展计划中。