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首页> 外文期刊>Limnology >Multilayer biological structure and mixing in the upper water column of Lake Biwa during summer 2008
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Multilayer biological structure and mixing in the upper water column of Lake Biwa during summer 2008

机译：2008年夏季琵琶湖上水柱的多层生物结构和混合

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We carried out a 24-h station experiment at Lake Biwa (Japan) to measure mixing events and concurrent biological signals using a free-fall microstructure profiler (TurboMAP-L), conventional hydrographic measurement device (F-probe), and the Tracker acoustic profiling system (TAPS). A clearly defined three-layer physical system was observed. Two layers were actively mixed: the surface-mixed layer and the subsurface-mixed layer. Both winds and night-time convection create the surface-mixed layer, and vertical shear due to a counterclockwise gyre maintains turbulence in the subsurface mixing layer. A strongly stratified layer between these two mixing layers is almost turbulence free, so no material flux is expected. A local oxygen maximum layer, a local oxygen minimum layer, and layers of increased chlorophyll and zooplankton abundance are all located in this strongly stratified layer. The data show the intricate influence of physical processes on the structure of biological systems and their combined influence on biogeochemical and trophic transfers in aquatic systems.
机译：我们在日本琵琶湖进行了24小时站内实验，以使用自由落体微结构轮廓仪（TurboMAP-L），常规水文测量仪（F-probe）和Tracker声学仪测量混合事件和同时发生的生物信号配置文件系统（TAPS）。观察到清晰定义的三层物理系统。主动混合两层：表面混合层和次表面混合层。风和夜间对流都会形成表面混合层，逆时针旋转产生的垂直剪切力会在地下混合层中保持湍流。这两个混合层之间的强分层层几乎没有湍流，因此不会产生材料通量。局部最大氧层，局部最小氧层以及叶绿素和浮游动物丰度增加的层均位于该强烈分层的层中。数据显示了物理过程对生物系统结构的复杂影响，以及它们对水生系统中生物地球化学和营养传递的综合影响。

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