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

摘要 97-27058 Schladow 合作研究：在湖泊生态系统中作为输出生产区的叶绿素深层：在形成和维持变水生产中流体动力学和生物运输的重要性 在清澈的湖泊和海洋中，许多微观植物生物量存在于水柱深处，在称为深层叶绿素层的地层中。人们对形成这些层的过程知之甚少，也不知道它们对促进浮游动物和鱼类生产的重要性。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和水体示踪剂来确定：（1）支持植物在叶绿素深层生产的营养物质来源;（2）物理混合过程的相对重要性（例如风、湍流）和在地层之间移动营养物的生物过程;（3）深水中的植物生产有多少转移到不同地层中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 97-27058 Schladow 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.