The Formation and Influence of Spatially Structured Trophic Interactions in Primary Succession at Mount St. Helens

圣海伦斯山初级演替中空间结构营养相互作用的形成及其影响

• 批准号: 0089843
• 负责人: John Bishop
• 金额: $ 29.78万
• 依托单位: Washington State University
• 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: 2001-08-15 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0089843&HistoricalAwards=false
• 关键词: Formation; Influence; Spatially; Structured; Trophic

Research will examine on how trophic interactions (i.e., feeding relationships) influence succession using a natural biological invasion in which a native plant (lupine) and its associated specialist herbivores are recolonizing Mount St. Helens. Efforts will quantify the extent to which spatial variation in the dynamics of trophic interactions influences the pace and pattern of primary succession. This will afford a unique opportunity to unravel complex connections between consumer-resource interactions over a large landscape. Indeed, the Mount St. Helens landscape provides a unique but fleeting opportunity to study an herbivore-mediated transition between successional phases. Three questions will be answered in detail. First, do resource or consumer gradients associated with patches of lupine drive spatially structured herbivore dynamics during primary succession? Second, do lupines and lupine herbivory affect the community dynamics of plants? Third, how is this complex tritrophic reinvasion progressing and influencing primary succession? The detailed investigations will constitute a key case study of how sequential spatial advance of components of a parasitoid-herbivore-plant system can influence the dynamics of species change at the landscape scale of analysis.

研究将利用自然生物入侵来研究营养相互作用（即喂养关系）如何影响演替，其中本土植物（羽扇豆）及其相关的专业食草动物正在圣海伦斯山重新定居。 我们将努力量化营养相互作用动态的空间变化对初级演替的速度和模式的影响程度。 这将为揭示大范围内消费者与资源交互之间的复杂联系提供独特的机会。 事实上，圣海伦斯山的景观提供了一个独特但短暂的机会来研究食草动物介导的演替阶段之间的过渡。 三个问题将得到详细解答。 首先，与羽扇豆斑块相关的资源或消费者梯度是否会在初级演替过程中驱动空间结构的食草动物动态？ 其次，羽扇豆和羽扇豆食草会影响植物的群落动态吗？ 第三，这种复杂的三营养再入侵是如何进展并影响初级演替的？ 详细的调查将构成一个关键案例研究，研究寄生类-草食动物-植物系统组成部分的连续空间推进如何影响景观分析尺度上的物种变化动态。