Biologically- induced Mixing of Stratified Waters by Swimming Zooplankton

游泳浮游动物生物诱导的分层水混合

• 批准号: 193232038
• 负责人: Professor Dr. Andreas Lorke
• 金额: --
• 依托单位: Bundesanstalt für Wasserbau (BAW)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/193232038?language=en
• 关键词: Biologically; induced; Mixing; Stratified; Waters

Swimming of aquatic organisms is associated with the generation of velocity fluctuations and fluid mixing. Such biologically-generated flows are not only important for the organisms itself, by affecting nutrient uptake, predator-prey interactions, and the perception of hydrodynamic and chemical signals, an ongoing scientific debate also concerns their importance for the vertical mass and heat transport on basin-scales. In this project we will quantify the fluid transport associated with swimming zooplankton in density-stratified waters. Although zooplankton belongs to the smallest motile organisms in aquatic ecosystems, their contribution to biomixing are expected to be important because they occur in high densities and many zooplankton species perform a diel vertical migration. Using volumetric particle image velocimetry for characterizing the flow field, in combination with laser-induced fluorescence for measuring scalar transport and fluxes, we will quantify the biologically-induced mixing due to individuals, groups of interacting organisms, and vertically migrating zooplankton, in a series of laboratory experiments.

水生生物的游动与速度波动和流体混合的产生有关。这种生物产生的流动不仅对生物本身很重要，通过影响营养吸收，捕食者-猎物相互作用以及对流体动力学和化学信号的感知，正在进行的科学辩论也关注它们对流域尺度上垂直质量和热量传输的重要性。在这个项目中，我们将量化与浮游动物在密度分层沃茨中的流体输送。虽然浮游动物属于水生生态系统中最小的能动生物，但它们对生物混合的贡献预计是重要的，因为它们以高密度出现，许多浮游动物物种进行昼夜垂直迁移。使用体积粒子图像测速的流场特征，结合激光诱导荧光测量标量运输和通量，我们将量化的生物诱导的混合由于个人，相互作用的生物体群体，和垂直迁移的浮游动物，在一系列的实验室实验。

项目成果

Direct observation of biomixing by vertically migrating zooplankton

通过垂直迁移浮游动物直接观察生物混合

• DOI: 10.4319/lo.2014.59.3.0724
• 发表时间: 2014
• 期刊: Limnology and Oceanography
• 影响因子: 4.5
• 作者: A. Lorke

Zooplankton induced currents and fluxes in stratified waters

分层水中浮游动物感应电流和通量

• DOI: 10.2166/wqrjc.2012.135
• 发表时间: 2012
• 期刊: Water Quality Research Journal of Canada
• 影响因子: 2
• 作者: A. Lorke