Dissertation Research: Spatially Autocorrelated Environmental Heterogeneity: Within-Population Effects in Danthonia spicata

论文研究：空间自相关环境异质性：丹松草的种群内效应

• 批准号: 9623772
• 负责人: Katherine Gross
• 金额: $ 0.95万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-15 至 1999-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9623772&HistoricalAwards=false
• 关键词: Dissertation; Research; Spatially; Autocorrelated; Environmental

9623772 Gross Environments differ in both the level and spatial scale of heterogeneity in resources. Plants can respond to this variation either by individually buffering environmental changes without decreasing their reproductive success or by avoiding exposure to the negative portion of environmental variation through seed dispersal. If an individual cannot buffer or avoid deleterious environmental change then its performance will decline. Research funded by this award will address whether genetic variation exists within plant populations for either buffering capacity or avoidance of environmental heterogeneity. The native grass, Danthonia spicata, will be used as a model system. Field experiments will assess the magnitude and scale of environmental variation experienced by several grass genotypes and a greenhouse study will test whether the same genotypes vary in their ability to buffer variation in one key growth resource, soil nitrogen. Fitness consequences of differences among individuals in buffering capacity will be tested. Understanding the ability of species to respond to environmental variation through joint response of multiple traits should be helpful in predicting how native plant populations will cope with environmental degradation.

小行星9623772 不同的环境在资源异质性的水平和空间尺度上都不同。 植物可以通过单独缓冲环境变化而不降低其繁殖成功率或通过种子传播避免暴露于环境变化的负面部分来应对这种变化。 如果一个人不能缓冲或避免有害的环境变化，那么他的表现就会下降。 该奖项资助的研究将解决植物种群内是否存在遗传变异，以缓冲能力或避免环境异质性。 本地草，蒲公英，将被用作一个模型系统。 田间实验将评估几种草基因型所经历的环境变化的幅度和规模，温室研究将测试相同的基因型是否在缓冲一个关键生长资源土壤氮的变化方面存在差异。 将测试个体之间缓冲能力差异的健身后果。了解物种通过多种性状的联合反应来应对环境变化的能力，应该有助于预测本地植物种群将如何科普环境退化。