Dissertation Research: Evaluation of a Hypothetical Model of Local Community Assembly in a Temporally Dynamic, Species Rich Neotropical River

论文研究：对时间动态、物种丰富的新热带河流中当地社区集会假设模型的评估

• 批准号: 0107456
• 负责人: Kirk Winemiller
• 金额: $ 0.6万
• 依托单位: Texas A&M AgriLife Research
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-05-01 至 2002-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0107456&HistoricalAwards=false
• 关键词: Dissertation; Research; Evaluation; Hypothetical; Model

Evaluation of a hypothetical model of local community assembly in a temporally dynamic, species rich neotropical river DEB 0107456; PI: Kirk O. Winemiller, Co-PI: D. Albrey ArringtonAbstractResults from this study will further our understanding of biological community structure and formation. Natural communities are affected by characteristics of the environment and interactions among constituent organisms. Understanding the relative importance of these factors and their interactions is highly relevant to the preservation of healthy communities and restoration of damaged communities. Our study investigates the temporal and spatial dynamics of community assembly in a tropical floodplain river with very high biodiversity. Our previous work has demonstrated consistent patterns in local fish and invertebrate communities that depend on physical habitat complexity and seasonal dynamics. In this study, we will conduct field experiments that manipulate habitat patches with variable physical complexity to evaluate the relative importance of physical and biological factors for species colonization. Our experimental design also will allow us to determine the relative importance of stochastic and deterministic processes in the formation of local communities. In other words, we hope to determine whether or not local biological communities are simply collections of individuals and species that happened to find an available habitat patch, or if community membership results from species interactions such as competition and predation. Based on previous descriptive research, we hypothesize that nonrandom processes result in highly patterned fish and invertebrate communities during the low-water period, and that colonization of local habitats becomes more random during the annual flood period.

对时间动态的、物种丰富的新热带河流中当地群落聚集的假设模型的评估DEB 0107456；PI：Kirk O.Winemiller，Co-Pi：D.Albrey Arrington摘要这项研究的结果将进一步加深我们对生物群落结构和形成的理解。自然群落受环境特征和组成生物之间的相互作用的影响。了解这些因素的相对重要性及其相互作用对于维护健康社区和恢复受损社区具有高度相关性。本研究对生物多样性极高的热带洪泛区河流群落聚集的时空动态进行了研究。我们之前的工作表明，当地鱼类和无脊椎动物群落的模式一致，这取决于物理栖息地的复杂性和季节动态。在这项研究中，我们将进行野外实验，操纵具有不同物理复杂性的栖息地斑块，以评估物理和生物因素对物种定殖化的相对重要性。我们的实验设计还将使我们能够确定随机和确定性过程在当地社区形成中的相对重要性。换句话说，我们希望确定当地的生物群落是不是碰巧找到了可用的栖息地的个人和物种的简单集合，或者社区成员资格是否源于物种之间的相互作用，如竞争和捕食。基于以前的描述性研究，我们假设，在枯水期，非随机过程导致高度图案化的鱼类和无脊椎动物群落，而在每年的洪水期，当地栖息地的定居变得更加随机。