Collaborative Research: Deep Chlorophyll Layers as Export Production Zones in Lake Ecosystems

在湖泊生态系统中，深层叶绿素层作为出口生产区：水动力学和生物运输在金属动力生产的形成和维持中的重要性在清澈的湖泊和海洋中，许多微观植物生物量发生在水柱深处，即深层叶绿素层。人们对形成这些层的过程知之甚少，也不知道它们对浮游动物和鱼类的重要性。在爱达荷州锯齿山的湖泊中工作，研究人员将使用稳定同位素lsN和水质量示踪剂来确定：(1)在深层叶绿素层中支持植物生产的营养来源；(2)物理混合过程（如风、湍流）和生物过程在地层间移动营养物质的相对重要性；(3)深水植物生产有多少被转移到不同地层的无脊椎动物和鱼类。因此，这项研究将进一步加深我们对控制水生食物网生产的物理、化学和生物过程之间联系的理解。

Abstract 97-26996 Wurtsbaugh Collaborative Research: Deep chlorophyll layers as export production zones in lake ecosystems: The importance of hydrodynamics and biological transport in the formation and maintenance of metalimnetic production In clear lakes and seas, much of the microscopic plant biomass occurs deep in the water column, in strata called deep-chlorophyll layers. Little is known about the processes that form these layers, nor their importance for fueling production of zooplankton and fish. Working in lakes of the Sawtooth Mountains of Idaho, the investigators will use the stable isotope lsN and water mass tracers to determine: (1) the sources of nutrients that support plant production in the deep chlorophyll layers; (2) the relative importance of physical mixing processes (e.g. wind, turbulence) and biological processes for moving nutrients between strata, and; (3) how much of the plant production in the deep water is transferred to the invertebrates and fish in different strata. This research will thus further our understanding of linkages between physical, chemical, and biological processes that govern production in aquatic food webs.