Biocomplexity-Dynamic Controls On Emergent Properties of River Flood Plains

0120523标准这一生物复杂性建议的概念基础是，河流泛滥平原是区域生态组织的中心。这个系统依赖于动态的、非线性的物理和生物过程之间的相互作用，这些过程将水、热和材料(生物群、沉积物和植物生长的营养物质)、通量和保留量与河流景观变化联系起来。持续时间短、水流功率大的洪水、河道和泥沙运动、由于植被和枯木的存在而增加的粗糙度以及地下水的上涌之间的强烈相互作用，创造了复杂的、动态的资源斑块分布，我们称之为移行的栖息地镶嵌。利用这一概念基础和二十年来对美国西部河流广阔的砾石-鹅卵石泛滥平原进行的研究的影响，这一研究促进了生物多样性和复杂的食物网，这些食物网隔离和转换能源和材料。我们提出了一套工作假设，以解决这些和其他类似泛滥平原的紧急性质。我们将改进现有的三维水文模型，并将其与新的河道变化、热通量和养分循环模型集成在一个基于遥感信息的动态洪泛区生物地球化学模拟器中。我们的目标是在空间上明确地量化与栖息地动态相关的热量和营养通量。我们提出了一个教育组成部分，积极将泛滥平原研究与平头湖生物站(FLBS)的夏季学术项目、我们当地美洲原住民学院(Salish And Kotenai College)的自然资源课程以及针对环境专业人员和高中教师的年度全国研讨会联系起来。

0120523StanfordThe conceptual foundation of this biocomplexity proposal is that river flood plains are regional centers of ecological organization. This system is dependent on interactions among dynamic, nonlinear physical and biological processes linking water, heat and materials (biota, sediment, and plant-growth nutrients), flux and retention to fluvial landscape change. Strong interactions between short-duration, high stream-power floods, channel and sediment movement, increased roughness due to presence of vegetation and dead wood and upwelling of groundwater creates a complex, dynamic distribution of resource patches, which we refer to as the shifting habitat mosaic. This rnosaic promotes biodiversity and complex food webs that sequester and transform energy and materials.Using this conceptual foundation and the implications of two decades of research on expansive gravel-cobble flood plains in western USA rivers. we propose a set of workinghypotheses that address emergent properties of these and other similar flood plains. We will improve and integrate our existing 3D hydrologic model with new channel change, heat flux and nutrient cycling model in a dynamic flood plain biogeochemical simulator that is initialized from remote sensing information. The goal is spatially explicit quantification of heat and nutrient fluxes in relation to the habitat dynamics.We propose an educational component that proactively links the floodplain research with the summer academic program at the Flathead Lake Biological Station (FLBS), the natural resources curriculum of our local Native American college (Salish and Kootenai College) and an annual national workshop for environmental professionals and high school teachers.