Species-, Community-, and Ecosystem-Level Consequences of the Interactions Among Multiple Resources

多种资源之间相互作用的物种、群落和生态系统层面的后果

• 批准号: 0108960
• 负责人: Edward Rastetter
• 金额: $ 41.79万
• 依托单位: Marine Biological Laboratory
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-15 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0108960&HistoricalAwards=false
• 关键词: Species; Community; Ecosystem; Level; Consequences

All plants need to acquire at least 15 elements from their environment including carbon, nitrogen, phosphorus and sulphur. In addition to these element resources, plants also require light and water. Although the relative requirement for these resources by plants remains relatively constant, their relative availability in the environment can vary drastically in both space and time. Plants must therefore adjust to this variability in resource availability to maintain a balanced nutrition. The relative success of various species in making this adjustment will in part determine the productivity of the ecosystem, the composition of the plant community, the species diversity, the rates of nutrient cycling, and the rate of CO2 storage or loss. In this grant, a theoretical foundation is established for understanding the complex interactions among multiple resources and the consequences of these interactions on species, on communities of plants, and on ecosystem processes like nutrient cycling and carbon sequestration. The theory is then tested using data from the Arctic Tundra Long-Term Ecological Research (LTER) site in northern Alaska.

所有植物都需要从环境中获取至少15种元素，包括碳、氮、磷和硫。除了这些元素资源，植物还需要光和水。虽然植物对这些资源的相对需求量保持相对恒定，但它们在环境中的相对可得性在空间和时间上都可能发生巨大变化。因此，植物必须适应这种资源可用性的变化，以保持营养平衡。不同物种在进行这种调整时的相对成功程度将在一定程度上决定生态系统的生产力、植物群落的组成、物种多样性、养分循环的速度以及二氧化碳储存或损失的速度。在这项资助中，为理解多种资源之间复杂的相互作用以及这些相互作用对物种、植物群落和营养循环和碳封存等生态系统过程的影响奠定了理论基础。然后，该理论将使用位于阿拉斯加北部的北极苔原长期生态研究（LTER）站点的数据进行测试。